ipv6 cisco live
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IPv6 Troubleshooting
BRKRST-2302
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Agenda
Definition
Service Level Agreement 5 9s 4 9s 3 9s
IPv6 addressing refresher
Troubleshooting approach in LAN/WAN environment
Troubleshooting FHRP
Troubleshooting IPv6 routingOSPFv3,EIGRPv6,mBGPTroubleshooting tunnels
Troubleshooting 6PE,6VPE
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Definition and Purpose
A systematic search for the source of a problem so that it can be solved
To ensure that the system is available and operating in an effective and effimanner as required in accomplishing its specified objective
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Avail abi li ty Down t ime / yr. Down t ime /month Down t
90% ("one nine") 36.5 days 72 hours 16.8
99.9% ("three nines") 8.76 hours 43.2 minutes 10.1
99.95% 4.38 hours 21.56 minutes 5.04
99.99% ("four nines") 52.56 minutes 4.32 minutes 1.0199.999% ("five nines") 5.26 minutes 25.9 seconds 6.05
99.9999% ("six nines") 31.5 seconds 2.59 seconds 0.60
High Availability - challenges
http://en.wikipedia.org/wiki/High_availability
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Back 2 the Hex - IPv6 addressing refreshe
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Aggregatable Global Unicast Address Allocation Mechanism
The strip from 0000:: to ffff::
The first 16 bits of the total 128 bits
0000:: - loopback and unspecified
0001 IANA Registry ISP
0010 - 2000::/3 - 2001::/16 - 2001::/23 - 2001::/32 - 2001::/48
00110100
0101
ffff::
Typicaallocat
Allocation fromRegistries to ISP
ARINAPNICAFRINICLACNICRIPE
Note Enterprises can get PI prefix from ARIN
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IPv6 Site Addressing Common Misconcepti
ExampleAllocated prefix is 2001:0db8:1234::/48
That means 16 bits are available to generate 64 K subnets from the alloc
You have 2001:0db8:1234: 0001::/64 , 2001:0db8:1234: 000your subnet prefixes
2001:0db8:1234::/48 - 2001:0db8:1234: 0000 ::/64
to
2001:0db8:1234: ffff ::/64
65535Not ho
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A Typical IPv6 Interface on a Router
R1#sh ipv6 interface
Ethernet0/0 is up, line protocol is up
IPv6 is enabled, link-local address is FE80::A8BB:CCFF:FE00
Global unicast address(es):
2001:DB8:1234:5678:A8BB:CCFF:FE00:A00
Joined group address(es):
FF02::1
FF02::2
FF02::1:FF00:A00
All Nodes Multicast Address
All Routers Mul ticast Address
Solicited Node Multicast Add
Valid only on t
Reachable Glo
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Dual StackIPv4 and IPv6
IPv6-router#sh run int gigabitEthernet 2/2
Building configuration...
interface GigabitEthernet2/2
ip address 192.168.1.1 255.0.0.0
ipv6 address 2001:DB8:1234:5678::/64 eui-64end
Nodes IPv4 a
Stack
Note Nexus OS follows secondary address CLI for now. Multiplecan be assigned to a single interface. In IPv6 no concept of secondary
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Let The Trouble Shooting Begin
Connectivity
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A Peek Inside the IPv6 Basic HeaderTrafficClass
Destination Add
Source Address
Payload Length
Version
R10#debug ipv6 icmp
R10#ping 2001:DB8:ABCD:BCDF:A8BB:CCFF:FE00:3200
Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to 2001:DB8:ABCD:BCDF:A8BB:CCFF:FE00:3200,timeout is 2 seconds !!!!!Success rate is 100 percent (5/5), round-trip min/avg/max = 40/53/72 ms
Mar 23 20:31:28.495: IPv6: nexthop FE80::A8BB:CCFF:FE00:1400,Mar 23 20:31:28.495: IPV6: source 2001:DB8:1020:1020:A8BB:CCFF:FE00:A00 (local)Mar 23 20:31:28.495: dest 2001:DB8:ABCD:BCDF:A8BB:CCFF:FE00:3200 (Ethernet0/0)Mar 23 20:31:28.495: traffic class 0, flow 0x0, len 100+0, prot 58, hops 64, originating
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ICMPv6 ND Message Types Captured
Router solicitation (ICMPv6 type 133)
Mar 24 23:07:32.721: ICMPv6-ND: Received RS on Ethernet1/0 fromFE80::A8BB:CCFF:FE00:2801
Router advertisement (ICMPv6 type 134)Mar 24 22:59:17.205: ICMPv6-ND: Sending RA to FF02::1 on Ethernet1/0
Neighbor solicitation (ICMPv6 type 135)
Mar 24 22:58:29.417: ICMPv6-ND: Received NS for FE80::A8BB:CCFF:FE00:A00 on from FE80::A8BB:CCFF:FE00:1400
Neighbor advertisement (ICMPv6 type 136)Mar 24 22:58:29.417: ICMPv6-ND: Sending NA for FE80::A8BB:CCFF:FE00:A00 on E
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Stateless Address Assignment Through RA(Router Advertisement)
R20#sh runBuilding configuration...
Current configuration : 89 bytes!interface Ethernet0/0no ip addressipv6 address 2001:DB8:1234:5678::/64end
R10#sh runBuilding configuration...
Current configuration interfaceEthernet0/0no ip addressipv6 address autoconfigipv6 enable
end
What is
missing
Router R20 Will Not Send Any Prefix and as a Result Router R10 Will Not Receive Any Global Prefix
R20
R10
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IPv6 Unicast Address Configuration
1. Configure IPv6 unicast routing globally
IPv6-router(config)#ipv6 unicast-routing2. On the interface, a global unicast address can be configured using sta
(router advertisements),stateful (DHCP) or administrator assigned
stateless
IPv6-router(config-if)#ipv6 address autoconfigadmin assignedIPv6-router(config)#int gigabitEthernet 2/2IPv6-router(config-if)# ipv6 address 2001:0db8:1234:5678::/64 eui-64IPv6-router(config-if)#end
Yes, you
configur
Required Steps
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Debug Captures of SLAAC
R10#
*Feb 2 22:18:25.455: ICMPv6-ND: Sending RS onEthernet0/0
*Feb 2 22:18:25.475: ICMPv6-ND: Received RAfrom FE80::A8BB:CCFF:FE00:1400 on Ethernet0/0
*Feb 2 22:18:25.475: ICMPv6-ND: Sending NS for2001:DB8:1234:5678:A8BB:CCFF:FE00:A00 onEthernet0/0
*Feb 2 22:18:25.475: ICMPv6-ND:Autoconfiguring2001:DB8:1234:5678:A8BB:CCFF:FE00:A00 onEthernet0/0
R20#
*Feb 2 22:14:01.107: ICMPv6-ND: Senon Ethernet0/0
*Feb 2 22:14:01.107: ICMPv6-ND: M
*Feb 2 22:14:01.107: ICMPv6-ND: p2001:DB8:1234:5678::/64 onlink autoco
PPPOE - IPv6CP does not support negotaddresses. you have to use SLAAC or DH
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Interface Now Has a Global AddressR10#show ipv6 interface ethernet 0/0
Ethernet0/0 is up, line protocol is up
IPv6 is enabled, link-local address is FE80::A8BB:CCFF:FE00:A00
Global unicast address(es):
2001:DB8:1234:5678:A8BB:CCFF:FE00:A00, subnet is 2001:DB8:1234:5678::/64 [PRE]
Joined group address(es):
FF02::1
FF02::2
FF02::1:FF00:A00
MTU is 1500 bytes
ICMP error messages limited to one every 100 milliseconds
ICMP redirects are enabled
ND DAD is enabled, number of DAD attempts: 1
ND reachable time is 30000 milliseconds
ND advertised reachable time is 0 milliseconds
ND advertised retransmit interval is 0 milliseconds
ND router advertisements are sent every 200 seconds
ND router advertisements live for 1800 seconds
Hosts use stateless autoconfig for addresses.
On P2P serial links, wDAD kicks in and intenot process IPv6 packdisable DAD to get ar
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/64 Requirement for autoconfig
R10#Mar 17 19:28:45.119: ICMPv6-ND: Sending RA to FF02::1 on Ethernet1/0Mar 17 19:28:45.119: ICMPv6-ND: MTU = 1500Mar 17 19:28:45.119: ICMPv6-ND: prefix = 2001:DB8:1040:1040::/96 onlink auto
*Mar 1 18:28:24.775: ICMPv6: Received ICMPv6 packet from FE80::A8BB:CCFF:FE00:A01, typ
R40#show ipv6 interface eth 1/0Ethernet1/0 is up, line protocol is up
IPv6 is enabled, link-local address is FE80::A8BB:CCFF:FE00:2801 No Virtual link-local address(es): No global unicast address is configured
e1/0R40
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/64 Requirement for autoconfigR10#sh run int eth 1/0
Building configuration...
interface Ethernet1/0no ip addressno ip directed-broadcastipv6 address 2001:DB8:1040:1040::/96
endR10(config-if)#ipv6 address 2001:DB8:1040:1040::/64 eui
R10(config-if)#Mar 17 19:37:44.795: ICMPv6-ND: Adding prefix 2001:DB8:1040:1040::/64 to Ethernet1/0Mar 17 19:37:44.795: ICMPv6-ND: Sending NS for 2001:DB8:1040:1040:A8BB:CCFF:FE00:A01 on Ethernet1/0Mar 17 19:37:45.815: ICMPv6-ND: DAD: 2001:DB8:1040:1040:A8BB:CCFF:FE00:A01 is unique.Mar 17 19:37:45.815: ICMPv6-ND: Sending NA for 2001:DB8:1040:1040:A8BB:CCFF:FE00:A01 on Ethernet1/0
Mar 17 19:37:45.815: ICMPv6-ND: Address 2001:DB8:1040:1040:A8BB:CCFF:FE00:A01/64 is up on Ethernet1/0
R40#*Mar 1 18:43:56.427: ICMPv6: Received ICMPv6 packet from FE80::A8BB:CCFF:FE00:1400, type 134R40#show ipv6 interface eth1/0Ethernet1/0 is up, line protocol is up
IPv6 is enabled, link-local address is FE80::A8BB:CCFF:FE00:2801 No Virtual link-local address(es):Global unicast address(es):
2001:DB8:1040:1040:A8BB:CCFF:FE00:2801, subnet is 2001:DB8:1040:1040::/64
e1/0R40
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Neighbor Relationship Using Link Local Addr
R20#sh ipv6 routers
Router FE80::A8BB:CCFF:FE00:A00 on Ethernet0/0, last updateHops 64, Lifetime 1800 sec, AddrFlag=0, OtherFlag=0, MTU=1
Reachable time 0 msec, Retransmit time 0 msec
Router FE80::A8BB:CCFF:FE00:2800 on Ethernet0/0, last updat
Hops 64, Lifetime 1800 sec, AddrFlag=0, OtherFlag=0, MTU=1Reachable time 0 msec, Retransmit time 0 msec
R20#
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Neighbor cache
Router# show ipv6 neighbors ethernet 2
IPv6 Address Age Link-layer Addr State Interface
2000:0:0:4::2 0 0003.a0d6.141e REACH Ethernet2
FE80::203:A0FF:FED6:141E 0 0003.a0d6.141e REACH Ethernet2
3001:1::45a - 0002.7d1a.9472 REACH Ethernet
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show ipv6 neighbors
Age
Time (in minutes) since the address was confirmed to be reachable. A hyphen (-) indicatentry.
Link-layer Addr
MAC address. If the address is unknown, a hyphen (-) is displayed.
State
The state of the neighbor cache entry. Following are the states for dynamic entries in theneighbor discovery cache:
show ipv6 neighbors (continued)
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show ipv6 neighbors (continued)
INCMP (Incomplete)Address resolution is being performed on the entry. A neighbsolicitation message has been sent to the solicited-node multicast address of the target
corresponding neighbor advertisement message has not yet been received.
REACH (Reachable)Positive confirmation was received within the last Reachablemilliseconds that the forward path to the neighbor was functioning properly. While instate, the device takes no special action as packets are sent.
STALEMore than ReachableTime milliseconds have elapsed since the last positiveconfirmation was received that the forward path was functioning properly. While in Sthe device takes no action until a packet is sent.
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Show ipv6 neighbors (continued)
DELAYMore than ReachableTime milliseconds have elapsed since the last positive cwas received that the forward path was functioning properly. A packet was sent within thDELAY_FIRST_PROBE_TIME seconds. If no reachability confirmation is received wiDELAY_FIRST_PROBE_TIME seconds of entering the DELAY state, send a neighbor message and change the state to PROBE.
PROBEA reachability confirmation is actively sought by resending neighbor solicitatevery RetransTimer milliseconds until a reachability confirmation is received
????Unknown state.
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Show ipv6 neighbors (static entries)
Following are the possible states for static entries in the IPv6 neigdiscovery cache:
INCMP (Incomplete)The interface for this entry is down.
REACH (Reachable)The interface for this entry is up.
Note Reachability detection is not applied to static entries in the Ineighbor discovery cache; therefore, the descriptions for the INC(Incomplete) and REACH (Reachable) states are different for dynand static cache entries.
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Neighbor stats = arp sum
R10#sh ipv6 neigh stat
IPv6 ND StatisticsEntries 1, High-water 2, Gleaned 0, Scavenged 1, Static 0Entry States
INCMP 0 REACH 1 STALE 0 GLEAN 0 DELAY 0 PROBE 0Resolutions
Requested 2, timeouts 0, resolved 1, failed 0In-progress 0, High-water 1, Throttled 0, Data discards 0
NUD
Requested 0, timeouts 0, resolved 0, failed 0in-progress 1, high-water 2, throttled 0, current queue 0, queue high-water 0
For cache use
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Good Neighbors
Nx7010-# show ipv6 neighbor vrf CiscoLive_2012
Flags: # - Adjacencies Throttled for GleanG - Adjacencies of vPC peer with G/W bit
IPv6 Adjacency Table for VRF CiscoLive_2012Total number of entries: 10Address Age MAC Address Pref Source Interfacfe80::222:55ff:fe79:2c42 2d02h 0022.5579.1c42 50 icmpv6 Vlan351fe80::20c:bdff:fe02:abf1 1d21h 000c.bd02.abf1 50 icmpv6 Vlan2012106:abbc:d00d:801::2 2d02h 0022.4579.1c42 50 icmpv6 Vlan50
N7K-7009-3# show ipv6 icmp neig
Flags: + - Adjacencies synced via CF# - Adjacencies Throttled for Gl
ICMPv6 Adjacency Table for VRF dAddress Age MAC Addres
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Common issue Router Hardening ?6CE_1#show ipv6 neighborsIPv6 Address Age Link-layer Addr State Inter2001:DB8:1234:5678:A8BB:CCFF:FE00:1400 0 - INCMP Et0/
6VPE_1#sh run int eth 0/0Building configuration...
Current configuration : 187 bytes!
interface Ethernet0/0no ip addressipv6 address 2001:DB8:1234:5678::/64 eui-6ipv6 traffic-filter ciscolive2012 inipv6 traffic-filter ciscolive2012 outipv6 nd ra suppress
End
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ICMPv6 needs free but controlled flow6VPE_1#show ipv6 access-listIPv6 access list ciscolive2012
deny icmp any any (114 matches) sequence 50 permit ipv6 any any (3 matches) sequence 60
6CE_1#
*Mar 29 19:00:12.415: ICMPv6: Received ICMP unreachable code 1 fromFE80::A8BB:CCFF:FE00:1400
6VPE_1(config-ipv6-acl)#no deny icmp any any
6CE_1#show ipv6 neighborsIPv6 Address Age Link-layer Addr State In2001:DB8:1234:5678:A8BB:CCFF:FE00:1400 0 aabb.cc00.1400 REACH EFE80::A8BB:CCFF:FE00:1400 0 aabb.cc00.1400 REACH
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Testing Connectivity on Link Local AddreDirectly connected IPv6 hosts do not need global unicast prefixes assigned and caneach other on link local addresses (FE80::/10). However, an output interface needs to bespecified as all the interfaces have the same fe80::/10 prefix
FE80::A8BB:CCFF:FE00:A00
FE80::A8BB
R1#ping FE80::A8BB:CCFF:FE00:1400Output Interface: ethernet0/0Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to FE80::A8BB:CCFF:FEseconds:Packet sent with a source address of FE80::A8BB:CCFF:FE!!!!!Success rate is 100 percent (5/5), round-trip min/avg/max =
R1#
R2
No packet loss as in IPv4.FF02:0:0:0:0:1:FF/104based Neighbor discovery
R1
Testing Connectivity on Global Prefixes
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Testing Connectivity on Global Prefixes
Global prefixes reachability does not need output interface specified
R1
R2
2001:DB8:1234:5678:A8B
2001:DB8:1234:5678:A8BB:CCFF:FE00:A00
R1#ping 2001:DB8:1234:5678:A8BB:CCFF:FE00:1
Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to2001:DB8:1234:5678:A8BB:CCFF:FE00:1400, time!!!!!Success rate is 100 percent (5/5), round-trip min/avg/msR1#
"Unreach" counter corresponds to"Destination Unreachable Message "
R1
Testing Connectivity on Global Prefixes
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Testing Connectivity on Global Prefixes
IPv6: Packets addressed to unused addresses in P2P links are pingponge
R1
R2 ping-pong issue identified in RFC 6164. for XR See CSCtf64096 . IOS/XE a
/127 issue
:0 and :1 are the addresses Not :1 and :2
/126 issue
A P fi
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Anycast Prefixes
R10
R20
R20#sh run int eth 0/0Building configuration...
Current configuration : 129 bytes!interface Ethernet0/0
ipv6 address2001:DB8:1230:1230::/64 anycast
R30#sh run int eth 0/0Building configuration...
Current configuration : 129 by!interface Ethernet0/0
ipv6 address2001:DB8:1230:1230::/64 any
Anycast suffix required
Anycast addresswill never be thesource. Assigned on Routers only
A B h i
I i i ll l R30
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Anycast Behavior
R10#ping 2001:DB8:1230:1230::
Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to 2001:DB8:1230:1230::, timeout is 2 seconds:!!!!!Success rate is 100 percent (5/5), round-trip min/avg/max = 20/44/132 msR10#R10#ping 2001:DB8:1230:1230::Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to 2001:DB8:1230:1230::, timeout is 2 seconds:....!Success rate is 20 percent (1/5), round-trip min/avg/max = 1060/1060/1060 msR10#ping 2001:DB8:1230:1230::Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to 2001:DB8:1230:1230::, timeout is 2 seconds:!!!!!Success rate is 100 percent (5/5), round-trip min/avg/max = 20/45/128 msR10#
R10
R20
Initially only R30responds
R2aft
NeighborDiscoveryBased in LAN
Anycast Interfaces back t6CE 1#sh run int eth 0/0
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y6CE_1#sh run int eth 0/0Building configuration...
Current configuration : 90 bytes!interface Ethernet0/0no ip addressipv6 address 2001:DB8:1234:5678::/64 anycast
end
6VPE_1#show ipv6 interfaceEthernet0/0 is up, line protocol is up
IPv6 is enabled, link-local address is FE80::A8BB:CCFF:FE00:1400 No Virtual link-local address(es):Global unicast address(es):
2001:DB8:1234:5678::, subnet is 2001:DB8:1234:5678::/64 [ANY ND DAD is enabled, number of DAD attempts: 1
A t N ighb C h t ggl
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Anycast Neighbor Cache struggle
6CE_1#show ipv6 neighborsIPv6 Address Link-layer Addr State 2001:DB8:1234:5678:A8BB:CCFF:FE00:1400 0 - INCMP
*Mar 28 22:20:30.971: ICMPv6-ND: INCMP -> DELETE: 2001:DB8:1234:5678:A8BB:CCFF:FE
6CE_1#show ipv6 neighborsIPv6 Address Age Link-layer Addr State Interfac
FE80::A8BB:CCFF:FE00:1400 7 aabb.cc00.1400 STALE Et0/0
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FHRP Diving Catches
FHRP: HSRP The Required Steps
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q pR10
R20
IPv6 hosts learn of available IPv6 routers through IPv6 neighbor discoveryRA messages. These are multicast periodically, or may be solicited by hosts. HSRP is dto provide only a virtual first hop for IPv6 hosts.
R10(config-if)#standby ipv6 ?
X:X:X:X::X IPv6 link-local addressautoconfig Obtain address using autoconfiguration
R10(config-if)#standby ipv6 FE80::A8BB:CCFF:FE00:A00% HSRP version 2 is required for IPv6 support
R10(c onfig-if)#standby ipv6 FE80::A8BB:CCFF:FE00:A00% Address already in-use
Use a different Laddress or use thoption
FHRP: HSRP
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FHRP: HSRPR10
R20
R10#sh run int eth 0/0Building configuration...
Current configuration : 191 bytes!interface Ethernet0/0ipv6 address 2001:DB8:1230:1230::/64 eui-64ipv6 enablestandby version 2standby 0 ipv6 autoconfigstandby 0 priority 200standby 0 preempt
end
R20#sh run intBuilding confi
Current config!interface Etherno ip address
ipv6 address2001:DB8:123ipv6 enablestandby versiostandby 0 ipv6standby 0 priostandby 0 pree
end
R10(config-if)#00:11:40: %HSRP-5-STATECHANGE: Ethernet0/0 Grp 0 state Speak -> Standby
00:11:40: %HSRP-5-STATECHANGE: Ethernet0/0 Grp 0 state Standby -> Active
FHRP: HSRP Validation
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R10#show standbyEthernet0/0 - Group 0 (version 2)State is Active
4 state changes, last state change 01:00:16Virtual IP address is FE80::5:73FF:FEA0:0Active virtual MAC address is 0005.73a0.0000
Local virtual MAC address is 0005.73a0.0000 (v2 IPv6 default)
Hello time 3 sec, hold time 10 sec Next hello sent in 1.820 secs
Preemption enabledActive router is localStandby router is FE80::A8BB:CCFF:FE00:1400, priority 150 (expires in 8.920 secPriority 200 (configured 200)IP redundancy name is "hsrp-Et0/0-0" (default)
FHRP: HSRP ValidationR10
R20
FHRP: HSRP Validat
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R10
R20
R30#ping ipv6Target IPv6 address: FE80::5:73FF:FEA0:0Repeat count [5]: 10000Datagram size [100]:Timeout in seconds [2]:Extended commands? [no]:
Sweep range of sizes? [no]:Output Interface: ethernet0/0Type escape sequence to abort.Sending 10000, 100-byte ICMP Echos to FE80::5:73FF:FEA0:0, timeout is 2 seconds:Packet sent with a source address of FE80::A8BB:CCFF:FE00:1E00!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!R10(config)#int eth 0/0R10(config-if)#shutR10(config-if)#00:25:42: %HSRP-5-STATECHANGE: Ethernet0/0 Grp 0 state Active -> InitR10(config-if)#00:25:44: %LINK-5-CHANGED: Interface Ethernet0/0, changed state to administratively down00:25:45: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet0/0, changed state to downR10(config-if)#no shutR10(config-if)#00:25:58: %LINK-3-UPDOWN: Interface Ethernet0/0, changed state to up00:25:59: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet0/0, changed state to up00:26:00: %HSRP-5-STATECHANGE: Ethernet0/0 Grp 0 state Listen -> Active
Virtual IPv6address
Global V
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OSPFv3 Pit Falls
OSPFv3 Header and Hello Packet
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OSPFv3 Header and Hello Packet
Rtr Pri
Neighbor ID
HelloInterval RouterDeadIntervalDesignated Router
Backup Designated Router
Interface IDOptions
Version Type
Instance ID
Router ID Area ID
Packet Length
Checksum
Basic Header16 Bytes
Hel
Not Network Mask
OSPFv3 Configuration Needs
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e0/0e0/0
R10#sh run intBuilding configuration...
Current configuration : 137
ipv6 unicast-routing!interface Ethernet0/0
ipv6 address 2001:DB8:12
ipv6 ospf 124 area 0
ipv6 router ospf 124router-id 0.0.10.0log-adjacency-changes
R20#sh run int eth 0/0Building configuration
Current configuration : 137 bytes
ipv6 unicast-routing!interface Ethernet0/0
ipv6 address 2001:DB8:1240:1240::/64 eui-64ipv6 ospf 124 area 0
ipv6 router ospf 124router-id 0.0.20.0log-adjacency-changes
R20(config)#ipv6 router ospf 124*Feb 5 04:06:07.314: %OSPFv3-4-NORTRID: OSPFv3 process 124 could not pick a rou
please configure manuallyR20(config-rtr)#router-id 0.0.20.0
Process ID need not matchbetween Neighbors
R10e0/0e0/0
R20
OSPFv3-Related Multicast Group
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OSPFv3 Related Multicast Group
R10#sh ipv6 interface eth 0/0
Ethernet0/0 is up, line protocol is upIPv6 is enabled, link-local address is FE80::A8BB:CCFF:FE0Global unicast address(es):
2001:DB8:1240:1240:A8BB:CCFF:FE00:A00, subnet is2001:DB8:1240:1240::/64 [EUI]
Joined group address(es):FF02::1FF02::2FF02::5FF02::6
AllSPFRouters
AllDRouters
Common Indicators
Remembe
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Common Indicators
R20#sh ipv6 ospf interfaceEthernet0/0 is up, line protocol is up
Link Local Address FE80::A8BB:CCFF:FE00:1400, Interface ID 2Area 0, Process ID 124, Instance ID 0, Router ID 20.20.20.20 Network Type BROADCAST, Cost: 10Transmit Delay is 1 sec, State BDR, Priority 1Designated Router (ID) 10.10.10.10, local address FE80::A8BB:CCFF:FE00:A00Backup Designated router (ID) 20.20.20.20, local address FE80::A8BB:CCFF:FE00:1400Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
Hello due in 00:00:00Index 1/1/1, flood queue length 0
Next 0x0(0)/0x0(0)/0x0(0)Last flood scan length is 0, maximum is 2Last flood scan time is 0 msec, maximum is 0 msec
Neighbor Count is 2, Adjacent neighbor count is 2Adjacent with neighbor 40.40.40.40Adjacent with neighbor 10.10.10.10 (Designated Router)
Suppress hello for 0 neighbor(s)
multiple ininterface ainstance ID
Timersmatchneighb
show ipv6 ospf
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show ipv6 ospf
R20#show ipv6 ospfRouting Process "ospfv3 124" with ID 0.0.20.0It is an area border routerSPF schedule delay 5 secs, Hold time between two SPFs 10 secsMinimum LSA interval 5 secs. Minimum LSA arrival 1 secsLSA group pacing timer 240 secsInterface flood pacing timer 33 msecsRetransmission pacing timer 66 msecs
Number of external LSA 0. Checksum Sum 0x0 Number of areas in this router is 2. 2 normal 0 stub 0 nssa
Area BACKBONE(0) Number of interfaces in this area is 1SPF algorithm executed 11 times
Number of LSA 10. Checksum Sum 0x567F6 Number of DCbitless LSA 0 Number of indication LSA 0 Number of DoNotAge LSA 0Flood list length 0
database database: Summary
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database database: SummaryProcess 124 database summary
LSA Type Count Delete Maxage
Router 6 0 0 Network 1 0 0Link 7 0 0Prefix 4 0 0Inter-area Prefix 4 0 0Inter-area Router 0 0 0
Type-7 External 0 0 0Unknown 0 0 0Type-5 Ext 0 0 0Unknown AS 0 0 0Total 22 0 0
Mismatched Hello Parameters R30#sh run int serial 3/0Building configuration
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R50S3/0S2/0
R20#sh run int serial 3/0Building configuration...
Current configuration : 137 bytes
ipv6 unicast-routing!interface serial3/0ipv6 address 2001:DB8:1223:1223::/64 eui-64ipv6 ospf 124 area 0
Ipv6 ospf network point-to-multipoint
R20#
Building configuration...
Current configuration : 17ipv6 unicast-routing!interface serial0/0ipv6 address 2001:DB8:12ipv6 ospf 124 area 0
R30#R20#sh ipv6 ospf interface ser 3/0Serial2/0 is up, line protocol is upLink Local Address FE80::A8BB:CCFF:FE00:140Area 1, Process ID 124, Instance ID 0, Router ID 2 Network Type POINT_TO_MULTIPOINT, Cost: 4
Transmit Delay is 1 sec, State POINT_TO_MULTIPTimer intervals configured, Hello 30, Dead 120, W
Hello due in 00:00:20Index 1/1/2, flood queue length 0
Next 0x0(0)/0x0(0)/0x0(0)Last flood scan length is 0, maximum is 0Last flood scan time is 0 msec, maximum is 0 msec
Neighbor Count is 0, Adjacent neighbor count is 0Suppress hello for 0 neighbor(s)
Interface- Networktype mismatch
R20
R20#Mismatched Hello Parameters
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0*Feb 5 20:47:21.205: OSPFv3: Rcv hello from 50.50.50.50 area 1 from Serial3/0 FE80::A8BB:CCFF:FE00:3200
*Feb 5 20:47:21.205: OSPFv3: Mismatched hello parameters from FE80::A8BB:CCFF:FE00:3200
After matching/rectifying the network types on the interfaces
R20#*Feb 5 20:52:35.369: %OSPFv3-5-ADJCHG: Process 124, Nbr 50.50.50.50 on Serial3/0 from DOWN to INIT, Re
R20#*Feb 5 20:52:38.961: %OSPFv3-5-ADJCHG: Process 124, Nbr 50.50.50.50 on Serial3/0 from INIT to 2WAY, 2-W
*Feb 5 20:52:38.961: %OSPFv3-5-ADJCHG: Process 124, Nbr 50.50.50.50 on Serial3/0 from 2WAY to EXSTART*Feb 5 20:52:38.981: %OSPFv3-5-ADJCHG: Process 124, Nbr 50.50.50.50 on Serial3/0 from EXSTART to EXCH Negotiation Done*Feb 5 20:52:39.105: %OSPFv3-5-ADJCHG: Process 124, Nbr 50.50.50.50 on Serial3/0 fromEXCHANGE to LOADING, Exchange Done
*Feb 5 20:52:39.105: %OSPFv3-5-ADJCHG: Process 124, Nbr 50.50.50.50 on Serial3/0 fromLOADING to FULL, Loading Done
IP MTU Mismatch
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interface Ethernet0/0ipv6 address 2001:DB8:1020:1020::/64 eui-64ipv6 mtu 1400
ipv6 ospf 124 area 0
*Feb 15 18:20:04.332: OSPFv3: Rcv DBD from 40.40.40.40 on Ethernet0/0 seq 0x260x0013 flag 0x7 len 28 mtu 1400 state EXCHANGE*Feb 15 18:20:04.332: OSPFv3: Nbr 40.40.40.40 has smaller interface MTU
Ensure identical MTU on both ends of the link
*Feb 15 18:31:56.888: %OSPFv3-5-ADJCHG: Process 124, Nbr 40.40.40.40 on Ethfrom EXSTART to EXCHANGE, Negotiation DoneR20(config-if)#*Feb 15 18:32:01.916: %OSPFv3-5-ADJCHG: Process 124, Nbr 40.40.40.40 on Ethfrom EXCHANGE to LOADING, Exchange Done*Feb 15 18:32:01.916: %OSPFv3-5-ADJCHG: Process 124, Nbr 40.40.40.40 on Ethfrom LOADING to FULL, Loading Done
e0/0R10
passive-interface Default
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p
ipv6 router ospf 124router-id 0.0.0.10
log-adjacency-changes passive-interface default
R40e1/0e1/0
R10(config-rtr)#no passive-interface ethernet 1/0R10(config-rtr)#
*Feb 8 18:28:08.757: %OSPFv3-5-ADJCHG: Process 124, Nbr 40.40.40.40 on Ethernet1/0 LOADING to FULL, Loading Done
R10
Area Type Mismatch
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yp
R10#
ipv6 router ospf 124router-id 10.10.10.10log-adjacency-changesarea 2 nssa
R40e1/0e1/0
R40#ipv6 router ospf 1router-id 40.40.4log-adjacency-ch
area 2 nssa *Feb 8 18:32:20.237: OSPFv3: Hello fromFE80::A8BB:CCFF:FE00:2801 with mismatched NSSA option bit
*Feb 8 18:35:29.268: %OSPFv3-5-ADJCHG: Process 124, Nbr 40.40.40.40 on Ethernet1/0 from LOADING to FULL, Loading Done
Changearea type
ABR
R10
The Routing Table
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R10#sh ipv6 route ospfIPv6 Routing Table - 13 entriesCodes: C - Connected, L - Local, S - Static, R - RIP, B - BGP
U - Per-user Static routeI1 - ISIS L1, I2 - ISIS L2, IA - ISIS interarea, IS - ISIS summaryO - OSPF intra, OI - OSPF inter, OE1 - OSPF ext 1, OE2 - OSPF exON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2
OI 2001:DB8:2030:2030::/64 [110/122]
via FE80::A8BB:CCFF:FE00:1400, Ethernet0/0OI 2001:DB8:2050:2050::/64 [110/58]via FE80::A8BB:CCFF:FE00:1400, Ethernet0/0
OI 2001:DB8:2323:2323::/64 [110/122]via FE80::A8BB:CCFF:FE00:1400, Ethernet0/0
Link loca
Loopback Interface Behavior
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R50#show ipv6 ospf interface lo 0Loopback0 is up, line protocol is up
Link Local Address FE80::A8BB:CCFF:FE00:3200, Interface ID 20Area 1, Process ID 124, Instance ID 0, Router ID 50.50.50.50 Network Type LOOPBACK, Cost: 1Loopback interface is treated as a stub Host
O 2001:DB8:ABCD:BCDF:A8BB:CCFF:FE00:3200/128 [110/10]
R50#R50(config-if)#ipv6 ospf network point-to-point
R50(config-if)#endR50#show ipv6 ospf interface lo 0Loopback0 is up, line protocol is up
Link Local Address FE80::A8BB:CCFF:FE00:3200, Interface ID 20Area 1, Process ID 124, Instance ID 0, Router ID 50.50.50.50 Network Type POINT_TO_POINT, Cost: 1
OI 2001:DB8:ABCD:BCDF::/64 [110/59]
Routing ta
Instance ID: No Support at This Time
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Router#sh run interface ethernet 0/0Building configuration...Current configuration : 156 bytes!
interface Ethernet0/0ipv6 address 2001:DB8:1234:5678::/64 eui-64ipv6 ospf 1 area 0 instance 1Router(config)#int eth 0/0
Router(config-if)#ipv6 ospf 2 area 0 instance 2
Router#sh run interface etheBuilding configuration...
Current configuration : 156 b
!interface Ethernet0/0ip address 12.12.12.1 255.2ipv6 address 2001:DB8:123ipv6 ospf 2 area 0 instance 2
Just over writes theconfiguration
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EIGRPv6 challenges
Prerequisites for EIGRPv6
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EIGRPv6 available since 02/06 in 12.4.x.T trains
FF02::A multicast address is used for updates
A 32 bit IPv4 router ID must be defined
No Shut command applied to EIGRP process
Interfaces need to be applied with IPv6 EIGRP command to be advertised in to EIGRPv6
Recall Hex A isDecimal 10
Neighbor Process
Hello
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R10#sh runBuilding configuration...
Current configuration : 127 bytes
ipv6 router eigrp 124router-id 10.10.10.10shutdown
!interface Ethernet0/0ipv6 address 2001:DB8:1020:1020::/64 eui-64ipv6 eigrp 124ipv6 ospf 124 area 0
end
R40#sh runBuilding conf
Current confi
ipv6 router eirouter-id 10.no shutdown
interface Etheipv6 address
2001:DB8:40ipv6 eigrp 12end
R40#
R10(config)#ipv6 router eigrp 124R10(config-rtr)#no shutR10(config-rtr)#*Feb 12 20:16:22.640: %DUAL-5-NBRCHANGE: IPv6-EIGRP(0) 124: NeighborFE80::A8BB:CCFF:FE00:2800 (Ethernet0/0) is up: new adjacency
Interfaces neednot be on thesame subnet
e0/0e0
R10
EIGRPv6-Enabled Interface
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R40#show ipv6 interface ethernet 0/0Ethernet0/0 is up, line protocol is up
IPv6 is enabled, link-local address is FE80::A8BB:CCFF:FE00:2800 No Virtual link-local address(es):Global unicast address(es):
2001:DB8:1240:1240:A8BB:CCFF:FE00:2800, subnet is2001:DB8:1240:1240::/64 [EUI]
Joined group address(es):FF02::1FF02::2FF02::5FF02::AFF02::1:FF00:2800
This interface has joined theEIGRPv6 multicast group
EIGRPv6 Neighbor
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R40# show ipv6 eigrp neighbors
IPv6-EIGRP neighbors for process 124H Address Interface Hold Uptime SRTT RTO Q Seq(sec) (ms) Cnt Num
0 Link-local address: Et0/0 12 00:03:01 23 200 0 3FE80::A8BB:CCFF:FE00:A00
Count down before declaring neighbor down
Neighbor Discovered Since Neighbor Response Time
Wait time before next Xmission if no
Neighbor-Changes Messages-What Do They Mean ?
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What Do They Mean ?
Peer restartedneighbor reset relationship; why did relationbounce?
New adjacencynew neighbor relationship with this neighboinitial startup or after recovering from a neighbor that went do
Holding time expiredNo EIGRP packets from this neighborthe duration of the hold time; typically 15 seconds (180 secon
for low-speed NBMA)Retry limit exceededneighbor didn
t acknowledge a rpacket after at least 16 retransmissions
EIGRP Topology
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R10#show ipv6 eigrp topology
IPv6-EIGRP Topology Table for AS(124)/ID(10.10.10.10)Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,
r - reply Status, s - sia Status
P 2001:DB8:1010:1010::/64, 1 successors, FD is 128256via Connected, Loopback0
P 2001:DB8:4012:4012::/64, 1 successors, FD is 307200via FE80::A8BB:CCFF:FE00:2800 (307200/281600), Ethern
Computeddistance
Reporteddistance
Successor
Multiple Addresses on an Interface
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R50#sh run int ser 2/0Building configuration...
Current configuration : 228 bytes!interface Serial2/0no ip addressipv6 address 2001:DB8:2050:2050::/64 eui-64ipv6 address 2001:DB8:ABCD:ABCD::/64 eui-64
ipv6 eigrp 124serial restart-delay 0end
No concept ofPrimary/Secondarall prefixes areadvertised by defa
R40e0/0e0/0
RR10
Routing Table for Multiple Prefixes Receivedfrom the Same Interface
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from the Same InterfaceR40#show ipv6 route eigrp
IPv6 Routing Table - 16 entriesCodes: C - Connected, L - Local, S - Static, R - RIP, B - BGP
U - Per-user Static route
I1 - ISIS L1, I2 - ISIS L2, IA - ISIS interarea, IS - ISIS summaryO - OSPF intra, OI - OSPF inter, OE1 - OSPF ext 1, OE2 - OSPF ext 2ON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2D - EIGRP, EX - EIGRP external
D 2001:DB8:1010:1010::/64 [90/409600]via FE80::A8BB:CCFF:FE00:A00, Ethernet0/0
D 2001:DB8:2050:2050::/64 [90/2195456]via FE80::A8BB:CCFF:FE00:1400, Ethernet0/0
D 2001:DB8:ABCD:ABCD::/64 [90/2707456]via FE80::A8BB:CCFF:FE00:1400, Ethernet0/0
R40#ping 2001:DB8:2050:2050:A8BB:CCFF:FE00:3200
Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to 2001:DB8:2050:2050:A8BB:CCFF:FE00:3200, timeout iseconds:!!!!!Success rate is 100 percent (5/5), round-trip min/avg/max = 20/22/32 msR40#
Expired Hold Timer
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The hold time expires when an EIGRP packetis not received during hold time
Typically caused by congestion or physical errors
Router crash, powered off, disconnected, etc.Link issues (input/output queue drops, etc.) Network between us may be dropping packets(CRC errors, frame errors, excessive collisions)
e0/0
e0/0R10
Ping to Verify
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Ping the multicast address FF02::A from the other router
R40#ping ff02::a
Output Interface: ethernet0/0Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to FF02::A, timeout is 2 seconds:Packet sent with a source address of FE80::A8BB:CCFF:FE00:2800
Reply to request 0 received from FE80::A8BB:CCFF:FE00:1400, 16 msReply to request 1 received from FE80::A8BB:CCFF:FE00:1400, 0 msReply to request 2 received from FE80::A8BB:CCFF:FE00:1400, 4 msReply to request 3 received from FE80::A8BB:CCFF:FE00:1400, 0 msReply to request 4 received from FE80::A8BB:CCFF:FE00:A00, 0 msSuccess rate is 100 percent (5/5), round-trip min/avg/max = 0/4/16 ms5 multicast replies and 0 errors.R40#
Ensure you ping forcorrect neighbor
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MPBGP Multiple Guards
Multiprotocol BGP
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Multiprotocol BGP is an enhanced BGP that carries routing informationmultiple network layer protocol address families, for example, IPv6 addfamily and for IP multicast routes. All BGP commands and routing policcapabilities can be used with multiprotocol BGP.
Address Family Information/Sub-AFI(Capability) len 6
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(Capability) len 6*Feb 21 01:23:26.511: BGP: 2001:DB8:1010:1010:A8BB:CCFF:FE00:A00 OPEN has CAPAcode: 1, length 4*Feb 21 01:23:26.511: BGP: 2001:DB8:1010:1010:A8BB:CCFF:FE00:A00 OPEN has MP_Efor afi/safi: 2/1*Feb 21 01:23:26.511: BGP: 2001:DB8:1010:1010:A8BB:CCFF:FE00:A00 rcvd OPEN w/ op
parameter type 2 (Capability) len 2*Feb 21 01:23:26.511: BGP: 2001:DB8:1010:1010:A8BB:CCFF:FE00:A00 OPEN has CAPAcode: 128, length 0*Feb 21 01:23:26.511: BGP: 2001:DB8:1010:1010:A8BB:CCFF:FE00:A00 OPEN has ROUTREFRESH capability(old) for all address-families*Feb 21 01:23:26.511: BGP: 2001:DB8:1010:1010:A8BB:CCFF:FE00:A00 rcvd OPEN w/ op
parameter type 2 (Capability) len 2*Feb 21 01:23:26.511: BGP: 2001:DB8:1010:1010:A8BB:CCFF:FE00:A00 OPEN has CAPAB
code: 2, length 0*Feb 21 01:23:26.511: BGP: 2001:DB8:1010:1010:A8BB:CCFF:FE00:A00 OPEN has ROUTREFRESH capability for all address-familiesBGP: 2001:DB8:1010:1010:A8BB:CCFF:FE00:A00 rcvd OPEN w/ remote AS 65535*Feb 21 01:23:26.511: BGP: 2001 :DB8:1010:1010:A8BB:CCFF:FE00:A00 went from OpeOpenConfirm*Feb 21 01:23:26.511: BGP: 2001:DB8:1010:1010:A8BB:CCFF:FE00:A00 went fromOpenConfirm to Established
AFI 2 - IPv6 and SAFI IPv6 unicast
Remember the 32-Bit router-id
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R20#sh ip bgp sum% BGP cannot run because the router-id is not configuredBGP router identifier 0.0.0.0, local AS number 65535BGP table version is 1, main routing table version 1
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxR2001:DB8:1020:1020:A8BB:CCFF:FE00:A00
4 65535 0 0 0 0 0 never IdleR20#*Feb 20 20:45:48.665: %BGP-4-NORTRID: BGP could not pick a router-id.
Please configure manually. Where there is no IPv4address configured ona device
Peering on Loopback Interface Addresses
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router bgp 65535
bgp router-id 20.20.20.20 bgp log-neighbor-changesneighbor 2001:DB8:1020:1020:A8BB:CCFF:FE00:A00 remote-as 65535neighbor 2001:DB8:1020:1020:A8BB:CCFF:FE00:A00 update-source Loopback0
address-family ipv6neighbor 2001:DB8:1020:1020:A8BB:CCFF:FE00:A00 activate
R10 e0/0e0/0
*Feb 20 23:15:03.091: BGP: 2001:DB8:1020:1020:A8BB:CCFF:FE00:A00 passive open failed2001:DB8:1020:1020:A8BB:CCFF:FE00:1400 is not update-source Loopback0's address(2001:2020:2020:0:A8BB:CCFF:FE00:1400)
One of the most common mistakes. Use addresses to peer. Not default interface a
Do Not Peer on Loopback Link Local Addres
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R10 R20e0/0e0/0
R20#show ipv6 interface lo 0Loopback0 is up, line protocol is upIPv6 is enabled, link-local address is FE80::A8BB:CCFF
No Virtual link-local address(es):R10#show bgp ipv6 sumBGP router identifier 10.10.10.10, local AS number 65535BGP table version is 1, main routing table version 1
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcdFE80::A8BB:CCFF:FE00:1400
4 65535 8 8 1 0 0 00:00:45 0R10#
Everything looksfine right?
Peer Address Down but Session UpNot Rea
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R20#sh ipv6 int lo 0Loopback0 is administratively down, line protocol is down
IPv6 is enabled, link-local address is FE80::A8BB:CCFF:FE00:1400 [TEN]
R10#show bgp ipv6 sumBGP router identifier 10.10.10.10, local AS number 65535BGP table version is 2, main routing table version 21 network entries using 149 bytes of memory1 path entries using 76 bytes of memory2/1 BGP path/bestpath attribute entries using 264 bytes of memory0 BGP route-map cache entries using 0 bytes of memory
0 BGP filter-list cache entries using 0 bytes of memoryBGP using 489 total bytes of memoryBGP activity 1/0 prefixes, 1/0 paths, scan interval 60 secs
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRFE80::A8BB:CCFF:FE00:1400
4 65535 22 21 2 0 0 00:03:57 R10#
Last One on Link Local Addresses Based iBG
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router bgp 65535no synchronization bgp router-id 10.10.10.10 bgp log-neighbor-changesneighbor FE80::A8BB:CCFF:FE00:1400 remote-as 65535neighbor FE80::A8BB:CCFF:FE00:1400 update-source Loopback0neighbor FE80::A8BB:CCFF:FE00:1E00 remote-as 65535
neighbor FE80::A8BB:CCFF:FE00:1E00 update-source Loopback0no auto-summary!address-family ipv6neighbor FE80::A8BB:CCFF:FE00:1400 activateneighbor FE80::A8BB:CCFF:FE00:1E00 activateexit-address-family
R10 R20e0/0
e0/0
R
Link Local Addresses Cannot Be ReachedBeyond the Connected Neighbor
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y g
R10#show bgp ipv6 summaryBGP router identifier 10.10.10.10, local AS number 65535
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcdFE80::A8BB:CCFF:FE00:1400
4 65535 77 76 2 0 0 00:58:44 1FE80::A8BB:CCFF:FE00:1E00
4 65535 0 0 0 0 0 never ActiveR10#
R10#ping FE80::A8BB:CCFF:FE00:1E00Output Interface: ethernet0/0Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to FE80::A8BB:CCFF:FE00:1E00, timeout is 2 seconds:Packet sent with a source address of FE80::A8BB:CCFF:FE00:A00.....Success rate is 0 percent (0/5)
R10 R20e0/0
e0/0
R
Always Use Global Prefix for iBGP Peeringrouter bgp 65535no synchronization
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bgp router-id 10.10.10.10 bgp log-neighbor-changesneighbor 2001:db8:2020:0:A8BB:CCFF:FE00:1400 remote-as 65535neighbor 2001:db8:2020:0:A8BB:CCFF:FE00:1400 update-source Loopback0
no auto-summary!address-family ipv6neighbor 2001:db8:2020:0:A8BB:CCFF:FE00:1400 activateexit-address-family
R10 e0/0
router bgp 65535no synchronization
bgp router-id 20.20.20.20 bgp log-neighbor-changesneighbor 2001:DB8:1010:1010:A8BB:CCFF:FE00:A00 remneighbor 2001:DB8:1010:1010:A8BB:CCFF:FE00:A00 updno auto-summary!address-family ipv6neighbor 2001:DB8:1010:1010:A8BB:CCFF:FE00:A00 actinetwork 2001:2121:2121::/64no synchronizationexit-address-family
Here is where youadvertise prefixes toBGP
? Routing Table Has an Entry- Where Is the Prefix
R10# h i b
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R10#show ip bgp sumBGP router identifier 10.10.10.10, local AS number 65535BGP table version is 1, main routing table version 1
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd2001:db8:2020:0:A8BB:CCFF:FE00:14004 65535 90 89 1 0 0 0 1:26:54 0
R10#
R10#show ipv6 route bgpIPv6 Routing Table - 18 entriesCodes: C - Connected, L - Local, S - Static, R - RIP, B - BGP
U - Per-user Static routeI1 - ISIS L1, I2 - ISIS L2, IA - ISIS interarea, IS - ISIS summaryO - OSPF intra, OI - OSPF inter, OE1 - OSPF ext 1, OE2 - OSPFON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2
B 2001:db8:2121::/64 [200/0]via 2001:db8:2020:0:A8BB:CCFF:FE00:1400
R10#
Use IPv6 Specific Commands
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R10#show bgp ipv6 unicast summaryBGP router identifier 10.10.10.10, local AS number 65535BGP table version is 2, main routing table version 21 network entries using 161 bytes of memory1 path entries using 76 bytes of memory2/1 BGP path/bestpath attribute entries using 248 bytes of memory0 BGP route-map cache entries using 0 bytes of memory0 BGP filter-list cache entries using 0 bytes of memoryBGP using 485 total bytes of memoryBGP activity 1/0 prefixes, 1/0 paths, scan interval 60 secs
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd2001:db8:2020:0:A8BB:CCFF:FE00:1400
4 65535 15 14 2 0 0 00:11:42 1R10#R10#ping 2001:db8:2121:0:A8BB:CCFF:FE00:1400
Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to 2001:db8:2121:0:A8BB:CCFF:FE00:1400, timeout is 2 se!!!!!Success rate is 100 percent (5/5), round-trip min/avg/max = 12/15/20 msR10#
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Migration Bumps
Manual Tunnel
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R20#sh run int tunnel 0Building configuration...
Current configuration : 188 bytes!interface Tunnel0no ip addressipv6 address 2001:DB8:2424:2424::/64 eui-64ipv6 ospf 12345 area 0tunnel source 23.23.23.20tunnel destination 34.34.34.40tunnel mode ipv6ip
R40#sh run int tun 0
Building configuration...
Current configuration : 188 byte!interface Tunnel0no ip addressipv6 address 2001:DB8:2424:2ipv6 ospf 12345 area 0tunnel source 34.34.34.40tunnel destination 23.23.23.20tunnel mode ipv6ip
IPv4IPv6 R20
R40
Sanity Check for Manual Tunnels
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R20#pingProtocol [ip]:Target IP address: 34.34.34.40Repeat count [5]:Datagram size [100]:Timeout in seconds [2]:Extended commands [n]: ySource address or interface: 23.23.23.20Type of service [0]:Set DF bit in IP header? [no]:Validate reply data? [no]:Data pattern [0xABCD]:Loose, Strict, Record, Timestamp, Verbose[none]:Sweep range of sizes [n]:Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to 34.34.34.40, timeout is 2 seconds:!!!!!Success rate is 100 percent (5/5), round-trip min/avg/max = 20/38/100 msR20#
IPv4IPv6 R20
R40
Tunnel destination
Tunnel source
Tunnel Configuration Mismatch
IPv4 IP
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R20#show int tun 0Tunnel0 is up, line protocol is down
Hardware is TunnelMTU 1514 bytes, BW 9 Kbit, DLY 500000 usec, rely 255/255, load 1/255Encapsulation TUNNEL, loopback not setKeepalive not setTunnel source 23.23.23.20, destination 34.34.34.40Tunnel protocol/transport IPv6, sequencing disabled
R40#show int tunnel 0Tunnel0 is up, line protocol is up
Hardware is TunnelMTU 1514 bytes, BW 9 Kbit, DLY 500000 usec, rely 255/255, load 1/255Encapsulation TUNNEL, loopback not setKeepalive not setTunnel source 34.34.34.40, destination 23.23.23.20Tunnel protocol/transport IPv6/IP, sequencing disabled
IPv4IPv6 R20
R40
Tunnel Configuration MismatchIPv4
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R20#sh run int tun 0Building configuration...
Current configuration : 188 bytes!interface Tunnel0
no ip directed-broadcastipv6 address 2001:DB8:2424:2424::/64 eui-64tunnel source 23.23.23.20tunnel destination 34.34.34.40tunnel mode ipv6
end
R20(config-if)#tunnel mode ipv6ipR20(config-if)#
R20(config-if)#*Mar 12 03:18:20.787: %LINEPROTO-5-UPDOWN: Line protocol on Interface Tunnel0, chan*Mar 12 03:18:20.827: IPV6: source :: (local)*Mar 12 03:18:20.827: dest FF02::16 (Tunnel0)*Mar 12 03:18:20.827: traffic class 224, flow 0x0, len 76+0, prot 0, hops 1, originating
IPv4IPv6 R20
R40
A Working Tunnel 2001:DB8:5050:5050:A8BB:C
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R10#ping 2001:DB8:5050:5050:A8BB:CCFF:FE00:3201
Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to 2001:DB8:5050:5050:A8BB:CCFF:FE00:3201, timeout is!!!!!Success rate is 100 percent (5/5), round-trip min/avg/max = 80/98/152 msR10*Mar 13 18:00:37.262: Tunnel0: IPv6/IP encapsulated 23.23.23.20->34.34.34.40 (linktype=79*Mar 13 18:00:37.822: Tunnel0: to decaps IPv6/IP packet 34.34.34.40->23.23.23.20 (len=100
*Mar 13 18:00:37.822: Tunnel0: decapsulated IPv6/IP packet*Mar 13 18:00:37.822: FE80::2222:2228 -> FF02::5 (len=40 ttl=1)*Mar 13 18:00:38.890: Tunnel0: IPv6/IP encapsulated 23.23.23.20->34.34.34.40 (linktype=79*Mar 13 18:00:38.950: Tunnel0: to decaps IPv6/IP packet 34.34.34.40->23.23.23.20 (len=120*Mar 13 18:00:38.950: Tunnel0: decapsulated IPv6/IP packet*Mar 13 18:00:38.950: 2001:DB8:5050:5050:A8BB:CCFF:FE00:3201 ->
2001:DB8:1020:1020:A8BB:CCFF:FE00:A00 (len=60 ttl=63
IPv4R40
IPv6 R20R40
OSPFv3 Network Across the Tunnel
R40
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R20#show ipv6 ospf neighbor
Neighbor ID Pri State Dead Time Interface ID Interface40.40.40.40 1 FULL/ - 00:00:37 20 Tunnel010.10.10.10 1 FULL/BDR 00:00:37 2 Ethernet0/0R20#
*Mar 10 00:10:45.575: Tunnel0: IPv6/IP encapsulated 23.23.23.20->34.34.34.40 (linktype=79, len=120)*Mar 10 00:10:45.583: Tunnel0: IPv6/IP to classify 34.34.34.40->23.23.23.20 (len=120 ttl=253 tos=0x0)*Mar 10 00:10:45.623: Tunnel0: to decaps IPv6/IP packet 34.34.34.40->23.23.23.20 (len=120, ttl=253)*Mar 10 00:10:45.623: Tunnel0: decapsulated IPv6/IP packet*Mar 10 00:10:45.623:
2001:DB8:5050:5050:A8BB:CCFF:FE00:3200 -> 2001:DB8:1020:1020:A8BB:CCFF:FE00:A00 (len=60 ttl=63)*Mar 10 00:10:43.363: Tunnel0: decapsulated IPv6/IP packet*Mar 10 00:10:43.363: FE80::2222:2228 -> FF02::5 (len=40 ttl=1)
IPv4IPv6 R20R40
6to4 Automatic Tunnels
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IPv4IPv6
I
R20R40
R20#sh run int tunnel 0Building configuration...
Current configuration : 122 bytes!
interface Tunnel0no ip addressno ip directed-broadcastipv6 unnumbered Ethernet0/0tunnel source Ethernet1/0tunnel mode ipv6ip 6to4
end
R40#sh run int tunnel 0Building configuration...
Current configuration : 122!interface Tunnel0
no ip addressno ip directed-broadcastipv6 unnumbered Ethernetunnel source Ethernet0/0tunnel mode ipv6ip 6to4
end
Use the Correct Prefix of 2002::/16
IPv4IP 6
IPvR40
e 1/0e 0/0
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R20#sh run int eth 0/0Building configuration...
Current configuration : 116 bytes!interface Ethernet0/0no ip addressno ip directed-broadcastipv6 address 2001:1717:1714:2020::/64 eui-64
R20#sh run int eth 1/0Building configuration...
Current configuration : 93 bytes!interface Ethernet1/0ip address 23.23.23.20 255.255.255.0no ip directed-broadcast
IPv6 R20
Should be 2002
R20#ping 2001:2222:2228:4040:A8BB:CCFF:FE00:2801
Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to 2001:2222:2228:4040:A8BB:CCFF:FE00:2801, timeout is 2 seconds:!!!!!Success rate is 100 percent (5/5), round-trip min/avg/max = 40/61/140 msR20#
2001:2222:2228:4040:A8BB
Works in wrong pre
Common Mistake in Automatic TunnelsR40#sh run int eth 1/0
IPv4IPv6
I
R20R40
E0/0
E1/0
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R40#sh run int eth 1/0Building configuration..
Current configuration : !interface Ethernet1/0no ip addressno ip directed-broadcasipv6 address 2002:DB8ipv6 ospf 45 area 0
end
R40#R40#sh run int eth 0/0Building configuration..
Current configuration : 9!interface Ethernet0/0ip address 34.34.34.40 no ip directed-broadcas
end
R20#sh run int eth 1/0Building configurationCurrent configuration : 93 bytes
!interface Ethernet1/0ip address 23.23.23.20 255.255.255.0no ip directed-broadcast
end
R20#sh run int eth 0/0Building configurationCurrent configuration : 136 bytes
!interface Ethernet0/0no ip addressno ip directed-broadcastipv6 address 2002:DB8:1212:1212::/64 eui-64
ipv6 ospf 12 area 0
Can you spot the mistake23.23.23.20 in Hex is 1717:1714
E1/0
All the Required Configs for Automatic Tunn
IPIPv4T0R20IPv6
E 0/0 E 1/0E 0/0
E 1/0
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R40#sh run
interface Tunnel0ipv6 unnumbered Etherntunnel source Ethernet0/tunnel mode ipv6ip 6to4
interface Ethernet0/0ip address 34.34.34.40 2
interface Ethernet1/0ipv6 address 2002:2222:ipv6 ospf 45 area 0
ipv6 route 2002::/16 Tunn
R20#sh run
interface Tunnel0ipv6 unnumbered Ethernet0/0
tunnel source Ethernet1/0tunnel mode ipv6ip 6to4
interface Ethernet1/0ip address 23.23.23.20 255.255.255.0
interface Ethernet0/0ipv6 address 2002:1717:1714:2020::/64 eui-64ipv6 ospf 12 area 0
ipv6 route 2002::/16 Tunnel0ipv6 route ::/0 2002:2222:2228:4040:A8BB:CCFF:FE00:2801
T0R20IPv6 T0
23.23.23.20 inHex is 1717:1714
The Automatic Tunnel in Action
E 1/0
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R20#debug tunnelTunnel Interface debugging is onR20#ping 2001:DB8:5050:5050:A8BB:CCFF:FE00:3201
Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to 2001:DB8:5050:5050:A8BB:CCFF:FE00:3201, timeout!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 60/84/152 msR20#*Mar 15 17:19:24.466: Tunnel0: to decaps IPv6/IP packet 34.34.34.40->23.23.23.20(len=120, ttl=253)
*Mar 15 17:19:24.618: Tunnel0: decapsulated IPv6/IP packet*Mar 15 17:19:24.618: 2001:DB8:5050:5050:A8BB:CCFF:FE00:3201 -> 2002:1717:1714:2020:A8BB:CCFF:FE00:1400 (len=60 ttl=63)
IPv4IPv6
IPv
R20R40
T0
E 0/0 E 1/0E 0/0 E 1/0
T0
Accessing 2001 Global Prefixes2001:DB8:6060:6060
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R10#ping 2001:DB8:6060:6060:9CD7:2EFF:FEF0:99FA
Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to2001:DB8:6060:6060:9CD7:2EFF:FEF0:99FA, timeout is 2 seconds:
.....Success rate is 0 percent (0/5)
IPv4IPv6 R20R40
T0
E 0/0E 1/0
E 0/0 E
T0
ipv6 route 2002::/16 Tunnel0ipv6 route ::/0 2002:2222:2228:4040:A8BB:CCFF:FE00:2801
Ensure the networks on both sides of the tunnel are aware of a default route toreach the IPv6 internet
Accessing 2001 Global Prefixes
IP 4E 0/0E 0/0
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R20
IPv4IPv6 R40T0
E 0/0 E 1/0T0
R10#sh ipv6 routeIPv6 Routing Table - 8 entriesCodes: C - Connected, L - Local, S - Static, R - RIP, B - BGP
U - Per-user Static routeI1 - ISIS L1, I2 - ISIS L2, IA - ISIS interarea, IS - ISIS summaryO - OSPF intra, OI - OSPF inter, OE1 - OSPF ext 1, OE2 - OSPF ext 2ON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2
OE2 ::/0 [110/1], tag 12via FE80::A8BB:CCFF:FE00:1400, Ethernet0/0
OE2 2002::/16 [110/20]via FE80::A8BB:CCFF:FE00:1400, Ethernet0/0
R60#sh ipv6 route bgpIPv6 Routing Table - 8 entriesCodes: C - Connected, L - Local, S - Static, R - RI
U - Per-user Static routeI1 - ISIS L1, I2 - ISIS L2, IA - ISIS interareaO - OSPF intra, OI - OSPF inter, OE1 - OSPFON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA
B 2001:DB8:5050:5050::/64 [20/20]via FE80::A8BB:CCFF:FE00:2800, Serial3/0
B 2002::/16 [20/0]via FE80::A8BB:CCFF:FE00:2800, Serial3/0
R10#ping 2001:DB8:6060:6060:9CD7:2EFF:FEF0:99FA
Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to
2001:DB8:6060:6060:9CD7:2EFF:FEF0:99FA, timeout is 2 seconds:!!!!!Success rate is 100 percent (5/5), round-trip min/avg/max = 88/96/108 msR10#
R20
Automatic Tunnels Are Point to Multipoint
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ipv6 route 2002:: /16 Tunnel0ipv6 route ::/0 2002:2222:2228:4040:A8BB:CCFF:FE00:2801
R70
IPv6
v6Interne
T0
E 0/0 E 1/0E 0/0
T0IPv4
IPv6IP
R20R40
R10T0E 0/0
IPv6
R80
On evPE
6rd Tunnels (RFC 5969)IPv4Header
IPv6Packet
IPv6Packet
IPPa
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Native dual-stack IP service to the end site
Simple, stateless, automatic IPv6-in-IPv4 encap and decap functions
Embedded IPv4 address needs to match IPv4 address in Tunnel header for security
IPv6 traffic automatically follows IPv4 Routing (IPv4 address used as tunnel endpoint)
BRs placed at IPv6 edge, addressed via anycast for load-balancing and resiliency
Service ProviderIPv6
2001:db8:0f01
PEP P
6rd Tunnel
IPv4 Access Network6rd IPv6 End Site IPv6 Inte
IPv62001:db8:0d01
CETunnelbetweenCPEs
6rd Relay/CPETunnels
6rd BorderRelay
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6rd CE Configuration (IOS)
IPv4Header
IPv6Packet
IPv6Packet
IPPa
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!ipv6 general-prefix 6rd-prefix 6rd Tunnel1ipv6 unicast-routingipv6 cef!interface Tunnel1
ipv6 enabletunnel source Ethernet0/0tunnel mode ipv6ip 6rdtunnel 6rd prefix 2001:db8::/32tunnel 6rd ipv4 prefix-len16tunnel 6rd br 200.15.0.1 Config to Border Relay
IPv4Backbone Network
CE
IPv62001:db8:0f01
PE
P P
PE
6rd Tunnel
CE
IPv4 Backbone Network6rd IPv6 End Site 6rd IPv6 E
200.15.11.1 (e0/0)200.15.15.1 (e0/0)
!interface Ethernet0/0
description Shared IPv4 infrastructureip address 200.15.15.1 255.255.255.0
!interface Ethernet1/0
description End Site LANipv6 address 6rd-prefix ::1/64
!ipv6 route 2001:db8::/32 tunnel1ipv6 route ::/0 Tunnel1 2001:db8:1:: Default to BR
2001:db8:0f01::2(Host)
2001:db8:0b01::1 (e0/1)2001:db8:0f01::1 (e0/1)
6rd Border Relay Configuration (IOS)
IPv6Packet
IPv4Header
IPv6Packet
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IPv4Backbone Network
CE
IPv62001:db8:0f 01
PE
P PPE
IPv4 Backbone NetworkIPv6 Network
200.15.15.1 (e0/0)
2001:db8:0f01::2(Host)
IPv6 Internet2000::/3
200.15.0.1/128 (lo0)
2001:db8:1::/128 (e0/0)
6rd BorderRelay
6rd Border Relay
200.15.0.1/128 (lo0)
2001:db8:1::/128 (e0/0)6rd tunnel to closest BR
ipv6 general-prefix 6rd-prefix 6rd Tunnel1ipv6 unicast-routingipv6 cef!interface Tunnel1
ipv6 enabletunnel source Loopback0tunnel mode ipv6ip 6rdtunnel 6rd prefix 2001:db8::/32tunnel 6rd ipv4 prefix-len16
interface Ethernet0/0description IPv6 Internetipv6 address 2001:db8:1::/64
!interface Loopback0
description Shared IPv4 infrastructureip address 200.15.0.1 255.255.255.0
!ipv6 route 2001:db8::/32 tunnel1ipv6 route ::/0 2001:db8:2:: ! Or use routing protocol
6ProviderEdge mBGP session
IPv4 MPLSIPv6
2001:DB8:123
PE1
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PE1
PE2v6 IPv6
Hosts
2001:DB8:1234:5678::/64 eui-64
PE1#show ipv6 route
IPv6 Routing Table - 5 entriesCodes: C - Connected, L - Local, S - Static, R - RIP,U - Per-user Static routeI1 - ISIS L1, I2 - ISIS L2, IA - ISIS interarea, IO - OSPF intra, OI - OSPF inter, OE1 - OSPF eON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA
C 2001:DB8:1234:5678::/64 [0/0]via ::, Loopback10
L 2001:DB8:1234:5678:A8BB:CCFF:FE00:7900
via ::, FastEthernet0/1B 2001:DB8:1234:ABCD::/64 [200/0]via ::FFFF:2.2.2.2, IPv6-mpls
L FE80::/10 [0/0]via ::, Null0
L FF00::/8 [0/0]via ::, Null0
PE1#
PE1
PE1 learns the prefixthrough mPBGP session
PE1
6ProviderEdge mBGP session
PE2PE1v6
IPv6Hosts
2001:DB8:1234:5678::/64 eui-64
2001:DB8:123
PE1# hrouter ospf 12
IPv4 MPLS PE2
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PE1#sh runBuilding configuration...hostname PE1
ip cefipv6 unicast-routingipv6 cefmpls label protocol ldpmpls ipv6 source-interface FastEthernet0/1!interface Loopback0ip address 1.1.1.1 255.255.255.255!
interface FastEthernet0/1ipv6 address 2001:DB8:1234:5678::/64 eui-64!interface Ethernet0/0ip address 12.12.12.1 255.255.255.0
mpls ip!
log-adjacency-changesnetwork 1.1.1.1 0.0.0.0 area 0network 12.12.12.0 0.0.0.255 area
!router bgp 12no bgp default ipv4-unicast
bgp log-neighbor-changesneighbor 2.2.2.2 remote-as 12neighbor 2.2.2.2 update-source Lo!address-family ipv4neighbor 2.2.2.2 activateno auto-summaryno synchronizationexit-address-family!address-family ipv6neighbor 2.2.2.2 activateneighbor 2.2.2.2 send-labelnetwork 2001:DB8:1234:5678::/6exit-address-family
IPv6 CEF mustbe enabled
6ProviderEdgeIPv4 MPLS
mBGP session
PE1 PE2v6IPv6
Hosts
2001:DB8:123
IPv4 MPLS
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osts2001:DB8:1234:5678::/64 eu i-64
PE1# show bgp ipv6 unicastBGP table version is 14, local router ID is 1.1.1.1Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S StaleOrigin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path*> 2001:DB8:1234:5678::/64
:: 0 32768 i*>i2001:DB8:1234:ABCD::/64
::FFFF:2.2.2.2 0 100 0 I
PE1#show mpls forwarding-tableLocal Outgoing Prefix Bytes tag Outgoing Next Hoptag tag or VC or Tunnel Id switched interface16 Pop tag 2.2.2.2/32 0 Et0/0 12.12.12.219 Aggregate 2001:DB8:1234:5678::/64 \ 520PE1#
The required mPBGPsession and tags
6ProviderEdge mBGP session
PE22001:DB8:1234:5678::/64 eui-64
2001:DB8:123
PE1v6IPv6
HostsIPv4 MPLS
PE2#show bgp ipv6 sum
PE2
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PE2#show bgp ipv6 sumBGP router identifier 2.2.2.2, local AS number 12BGP table version is 14, main routing table version 142 network entries using 298 bytes of memory
2 path entries using 152 bytes of memory3/2 BGP path/bestpath attribute entries using 396 bytes of memoryBGP using 846 total bytes of memoryBGP activity 9/7 prefixes, 11/9 paths, scan interval 60 secs
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd1.1.1.1 4 12 181 180 14 0 0 00:12:01 1PE2#
PE2#PE2#ping 2001:DB8:1234:5678:A8BB:CCFF:FE00:7900 source 2001:DB8:1234:ABCD:A8BB:CCFF:FE00:7A0Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to 2001:DB8:1234:5678:A8BB:CCFF:FE00:7900, timeout is 2 seconds:Packet sent with a source address of 2001:DB8:1234:ABCD:A8BB:CCFF:FE00:7A00!!!!!Success rate is 100 percent (5/5), round-trip min/avg/max = 40/48/60 msPE2#
Good old 32 bitBGP router ID
6ProviderEdgeIPv4 MPLS
mBGP session
PE1 PE2v6 IPv6
HostsIPv4 MPLS
::FFFF:2.2.2.2::FFFF:1.1.1.1
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2001:DB8:1234:5678::/64 eui-642001:DB8:123
PE2#01:23:21: IPv6: nexthop ::FFFF:1.1.1.1,01:23:21: IPV6: source 2001:DB8:1234:ABCD:A8BB:CCFF:FE00:7A00 (local)01:23:21: dest 2001:DB8:1234:5678:A8BB:CCFF:FE00:7900 (IPv6-mpls)01:23:21: traffic class 0, flow 0x0, len 100+0, prot 58, hops 64, originating01:23:21: IPv6: Sending on Ethernet0/001:23:21: IPV6: source 2001:DB8:1234:5678:A8BB:CCFF:FE00:7900 (IPv6-mpls)01:23:21: dest 2001:DB8:1234:ABCD:A8BB:CCFF:FE00:7A0001:23:21: traffic class 0, flow 0x0, len 100+18, prot 58, hops 64, forward to ulp01:23:21: IPv6: nexthop ::FFFF:1.1.1.1,01:23:21: IPV6: source 2001:DB8:1234:ABCD:A8BB:CCFF:FE00:7A00 (local)01:23:21: dest 2001:DB8:1234:5678:A8BB:CCFF:FE00:7900 (IPv6-mpls)01:23:21: traffic class 0, flow 0x0, len 100+0, prot 58, hops 64, originating01:23:21: IPv6: Sending on Ethernet0/001:23:21: IPV6: source 2001:DB8:1234:5678:A8BB:CCFF:FE00:7900 (IPv6-mpls)01:23:21: dest 2001:DB8:1234:ABCD:A8BB:CCFF:FE00:7A0001:23:21: traffic class 0, flow 0x0, len 100+18, prot 58, hops 64, forward to ulp
IPv6 VPN 6VPE (RFC 4659)IPv6Packet
MPLS IPv4 BackboneIPv6/IPv4 Network IPv6/IPv4 Ne
VPNLabel
IPv6Packet
LDPLabel
IPv6Packet
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IPv4MPLS
6VPE uses existing IPv4 MPLS infrastructure to provide IPv6 VPNCore uses IPv4 control plane (LDPv4, TEv4, IGPv4)PEs must support dual stack IPv4+IPv6Offers same architectural features as MPLS-VPN for IPv4RTs, VRFs, RDs are appended to IPv6 to form VPNv6 addressMP-BGP distributed both VPN address familiesBGP NH uses IPv4 to IPv6 mapped address format ::ffff:A.B.C.D
VRF can contain both VPNv4 and VPNv6 routes
IPv4
IPv6
P P
CE1 6VPE1
P P
10.1.1.0/242001:db8:beef:1::/64
VRF
200.10.10.1 200.11.11.1
VRF
172.16.3.1/32001:db8:ca
172.16.1.0.0/302001:db8:cafe:1::/64
6VPE2
CE1 ConfigurationIPv6Packet
MPLS IPv4 BackboneIPv6/IPv4 Network IPv6/IPv4 Netw
VPNLabel
IPv6Packet
LDPLabel
IPv6Packet
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IPv4MPLSIPv4IPv6
P P
CE1 6VPE1
P P
10.1.1.0/242001:db8:beef:1::/64
VRF
200.10.10.1 200.11.11.1
VRF
172.16.3.1/302001:db8:caf
172.16.1.0/302001:db8:cafe:1::/64
ipv6 unicast-routingipv6 cef!interface Ethernet0/0
description Link to PE1ip address 172.16.1.1 255.255.255.0ipv6 address 2001:db8:cafe:1::1/64
!interface Ethernet1/0
description to GREEN LANip address 10.1.1.1 255.255.255.0ipv6 address 2001:db8:beef:1::1/64ipv6 rip GREEN enable
router bgp 500neighbor 2001:db8:cafe:1::2 remote-as 100neighbor 172.16.1.2 remote-as 100!address-family ipv4
redistribute eigrp 100neighbor 172.16.1.2 activate 6VPE1exit-address-family!address-family ipv6neighbor 2001:db8:cafe:1::2 activate 6VPE1redistribute rip GREENexit-address-family
6VPE2
Dual stack
6VPE1 General ConfigurationIPv6Packet
MPLS IPv4 BackboneIPv6/IPv4 Network IPv6/IPv4 Netw
VPNLabel
IPv6Packet
LDPLabel
IPv6Packet
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ipv6 unicast-routingipv6 cef!interface Loopback0
ip address 200.10.10.1 255.255.255.255
!interface Ethernet0/0Description Link to CE1vrf forwarding GREENip address 172.16.1.2 255.255.255.0ipv6 address 2001:db8:cafe:1::2/64
IPv4MPLSIPv4IPv6
P P
CE1 6VPE1
P P
10.1.1.0/242001:db8:beef:1::/64
VRF
200.10.10.1 200.11.11.1
VRF
172.16.3.1/302001:db8:caf
172.16.1.0/302001:db8:cafe:1::/64
!interface Ethernet2/0
description Link to Core Networkip address 192.168.1.1 255.255.255.252
mpls ip
!router ospf 1log-adjacency-changesredistribute connected subnets
passive-interface Loopback0network 192.168.1.0 0.0.0.255 area 0
6VPE2
6VPE1 BGP ConfigurationIPv6Packet
MPLS IPv4 BackboneIPv6/IPv4 Network IPv6/IPv4 Netw
VPNLabel
IPv6Packet
LDPLabel
IPv6Packet
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router bgp 100neighbor 200.11.11.1 remote-as 100neighbor 200.11.11.1 update-source lo0!address-family ipv4 Internet Routesneighbor 200.11.11.1 activateno auto-summaryno synchronizationexit-address-family!address-family vpnv4 To 6VPE2neighbor 200.11.11.1 activateneighbor 200.11.11.1 send-community extexit-address-family
IPv4MPLSIPv4IPv6
P P
CE1 6VPE1
P P
10.1.1.0/242001:db8:beef:1::/64
VRF
200.10.10.1 200.11.11.1
VRF
172.16.3.1.0/2001:db8:caf
172.16.1.0/302001:db8:cafe:1::/64
address-family vpnv6 To 6VPE2neighbor 200.11.11.1 activateneighbor 200.11.11.1 send-community extexit-address-family
!address-family ipv4 vrf GREEN To CE1redistribute connectedneighbor 172.16.1.1 remote-as 500neighbor 172.16.1.1 activateexit-address-family!address-family ipv6 vrf GREEN To CE1neighbor 2001:db8:cafe:1::1 remote-as 500neighbor 2001:db8:cafe:1::1 activateexit-address-family
6VPE2
6VPE2 IPv6 VRF RoutesIPv6Packet
MPLS IPv4 BackboneIPv6/IPv4 Network IPv6/IPv4 Netw
VPNLabel
IPv6Packet
LDPLabel
IPv6Packet
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IPv4MPLSIPv4IPv6
P P
CE1 6VPE1
P P
10.1.1.0/242001:db8:beef:1::/64
VRF
200.10.10.1 200.11.11.1
VRF
172.16.3.1.0/2001:db8:caf
172.16.1.0/302001:db8:cafe:1::/64
6VPE2#show ipv6 route vrf GREENB 2001:db8:beef:1::/64 [200/0]
via 200.10.10.1B 2001:db8:beef:2::/64 [20/0]
via FE80::A8BB:CCFF:FE01:FA00, Ethernet1/0B 2001:db8:cafe:1::/64 [200/0]via 200.10.10.1
C 2001:db8:cafe:3::/64 [0/0]via Ethernet1/0, directly connected
L 2001:db8:cafe:3::2/128 [0/0]via Ethernet1/0, receive
L FF00::/8 [0/0]via Null0, receive
6VPE2
6VPE1 BGP VPNv6 TableIPv6Packet
MPLS IPv4 BackboneIPv6/IPv4 Network IPv6/IPv4 Netw
VPNLabel
IPv6Packet
LDPLabel
IPv6Packet
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IPv4MPLSIPv4IPv6
P P
CE1 6VPE1
P P
10.1.1.0/242001:db8:beef:1::/64
VRF
200.10.10.1 200.11.11.1
VRF
172.16.3.1.0/2001:db8:caf
172.16.1.0/302001:db8:cafe:1::/64
6VPE1#show bgp vpnv6 unicast all Network Next Hop Metric LocPrf Weight Path
Route Distinguisher: 200:1 (default for vrf GREEN)*> 2001:db8:beef:1::/64
2001:db8:cafe:1::1 Route from CE10 0 500 ?*>i2001:db8:beef:2::/64
::FFFF:200.11.11.1 Route from CE2 via 6VPE20 100 0 506 ?
*>i2001:db8:cafe:3::/64::FFFF:200.11.11.1 PE/CE Connected route from 6VPE2
0 100 0 ?
6VPE2
Recall taddress
6VPE1 LFIBIPv6Packet
MPLS IPv4 BackboneIPv6/IPv4 Network IPv6/IPv4 Netw
VPNLabel
IPv6Packet
LDPLabel
IPv6Packet
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IPv4MPLSIPv4IPv6
P P
CE1 6VPE1
P P
10.1.1.0/242001:db8:beef:1::/64
VRF
200.10.10.1 200.11.11.1
VRF
172.16.3.1.0/2001:db8:caf
172.16.1.0/302001:db8:cafe:1::/64
6VPE1#show mpls forwardingLocal Outgoing Prefix Bytes Label Outgoing Next HopLabel Label or VC or Tunnel Id Switched interface16 Pop Label 192.168.1.4/30 0 Et2/0 192.168.1.217 16 192.168.1.8/30 0 Et2/0 192.168.1.2
18 Pop Label 200.12.12.1/32 0 Et2/0 192.168.1.219 18 200.13.13.1/32 0 Et2/0 192.168.1.220 19 200.11.11.1/32 0 Et2/0 192.168.1.221 No Label 10.1.1.0/24[V] 0 Et0/0 172.16.1.122 Aggregate 172.16.1.0/24[V] 570 GREEN25 No Label 2001:db8:beef:1::/64[V] \
570 Et0/0 FE80::A8BB:CCFF:FE01:F40026 Aggregate 2001:db8:cafe:1::/64[V] \
35456 GREEN
6VPE2
IPv6 Related Sessions at Cisco LiveSession Title
BRKRST-2044 Enterprise Multi-Homed Internet Edge Architectures
BRKCRS-2301 Enterprise IPv6 Deployment
Search Session Catalog: ipv6
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BRKCRT-9344 IPv6 for Cert Nuts
BRKRST-2311 IPv6 Planning, Deployment and Operation Considerations
BRKSEC-2003 IPv6 Security Threats and MitigationsBRKRST-2302 IPv6 Troubleshooting
BRKSPG-2602 IPv4 Exhaustion: NAT and Transition to IPv6 for SPs
BRKSPG-2603 How to Securely Operate an IPv6 Network
BRKUCC-2061 IPv6 in UC Networks
LTRRST-1301, LTRSEC-3033 IPv6 Hands-on Lab, IPv6 Network Threat, Defense, Countermeasures and Controls
BRKEWN-2010 Design and Deployment of Ent. WLAN
BRKCCIE-9492 IPv6 for Route & Switching CCIE Candidates
BRKRST-3300 Service Provider IPv6 Deployment
BRKSPG-2604 Deploying Carrier Grade IPv6 using CGSE
COCRST-3464 Cisco on Cisco: Making the Leap to IPv6
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Complete Your OnlineSession Evaluation
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y ycould win fabulous prizes.Winners announced daily.
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Final Thoughts
Get hands-on experience with the Walk-in Labs located in World of
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pSolutions, booth 1042
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