cisco ccna- ppp multilink configuration

CISCO CCNAPPP Multilink Configuration

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PPP Multilink Configuration

The Goal is that create a PPP Multilink on R1 and R2 so that the link between them will be double speed with IP address as follow:R1:10.10.10.1 /30R2: 10.10.10.2 /30


Step 1) go to each router and give the PPP encapsulationR1#show ip int brief

Interface IP-Address

OK? Method

Status Protocol

FastEthernet0/0

unassigned YES Method administratively down down

Serial1/0 unassigned YES manual up upSerial1/1 unassigned YES Method up upSerial1/2 unassigned YES Method administratively down downSerial1/3 unassigned YES Method administratively down downLoopback1 1.1.1.1 YES manual up up

PPP Multilink ConfigurationR1#config tEnter configuration commands, one per line. End with CNTL/Z.R1(config)#int s1/0R1(config-if)#encapsulation ? atm-dxi ATM-DXI encapsulation bstun Block Serial tunneling (BSTUN) frame-relay Frame Relay networks hdlc Serial HDLC synchronous lapb LAPB (X.25 Level 2) ppp Point-to-Point protocol sdlc SDLC sdlc-primary SDLC (primary) sdlc-secondary SDLC (secondary) smds Switched Megabit Data Service (SMDS) stun Serial tunneling (STUN) x25 X.25


R1(config-if)#encapsulation pppR1(config-if)#*Sep 13 16:48:25.875: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/0, changed state to down R1(config-if)#int s1/1R1(config-if)#encapsulation pppR1(config-if)#*Sep 13 16:48:52.335: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/1, changed state to downR1(config-if)#


As you see as soon as I changed the Encapsulations to PPP, It went down since I need to do R2 .R2#config tEnter configuration commands, one per line. End with CNTL/Z.R2(config)#int s1/0R2(config-if)#enR2(config-if)#encapsulation pppR2(config-if)#R2(config-if)#R2(config-if)#int s1/1

PPP Multilink ConfigurationR2(config-if)#R2(config-if)#*Sep 13 16:51:07.551: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/0, changed state to upR2(config-if)#encapsulation pppR2(config-if)#R2(config-if)#*Sep 13 16:51:14.127: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/1, changed state to upR2(config-if)#


Now If I go to each router I will see up and up R1#show ip int briefInterface IP-

AddressOK? Metho

d Status Protocol

FastEthernet0/0

unassigned YES NVRAM administratively down down

Serial1/0 unassigned YES manual up upSerial1/1 unassigned YES NVRAM up upSerial1/2 unassigned YES NVRAM administratively down downSerial1/3 unassigned YES NVRAM administratively down downLoopback1 1.1.1.1 YES manual up up

PPP Multilink ConfigurationStep 2) Now I will go create a Multilink Interface under R1 R1#int Multilink 100 ip address 10.10.10.1 255.255.255.252 ppp multilink ppp multilink group 100 R1#config tEnter configuration commands, one per line. End with CNTL/Z.R1(config)#int mulR1(config)#int multilink ? <1-2147483647> Multilink interface number R1(config)#int multilink 100R1(config-if)#ip add*Sep 13 16:58:20.103: %LINEPROTO-5-UPDOWN: Line protocol on Interface Multilink100, changed state to down


R1(config-if)#ip addR1(config-if)#ip address 10.10.10.1 255.255.255.252R1(config-if)#pppp multiR1(config-if)#ppp multiR1(config-if)#ppp multilinkR1(config-if)#ppp mulR1(config-if)#ppp multilink ? endpoint Configure the local Endpoint Discriminator fragment Specify fragmentation parameters group Put interface in a multilink bundle


idle-link Do not transmit fragments over the lowest speed link interleave Allow interleaving of small packets with fragments links Specify the limits on the number of links in a bundle load-threshold Specify threshold used to add/delete links mrru Configure multilink MRRU values multiclass Configure support for Multiclass Multilink queue Specify link queuing parameters slippage Set constraints on amount of data the MLP reassembly engine will buffer per link <cr>


R1(config-if)#ppp multilink groR1(config-if)#ppp multilink group ? <1-2147483647> Multilink group number R1(config-if)#ppp multilink group 1% Cannot add multilink-group interface to a different multilink groupR1(config-if)#ppp multilink group 100 As you see the group number and interface must be same on R1 , but for R2 I can use different Group number as we will see (I will use group 200 for R2)


Here is show run so far on R1:R1#show runinterface Multilink100 ip address 10.10.10.1 255.255.255.252 ppp multilink ppp multilink group 100!


Step 3) Now make sure go under each interface of int s1/0 and s1/1 give these commands and make sure use same as group 100int s1/0encapsultion pppppp multilinkppp multilink group 100 int s1/1encapsultion pppppp multilinkppp multilink group 100


R1#config tEnter configuration commands, one per line. End with CNTL/Z.R1(config)#int s1/0R1(config-if)#ppp multilinkR1(config-if)#ppp multilink group 100R1(config-if)#R1(config-if)#int s1/1R1(config-if)#ppp multilinkR1(config-if)#ppp multilink group 100

PPP Multilink ConfigurationNow lets look at R1#show ip int briefR1#show ip int briefInterface IP-Address OK? Method Status ProtocolFastEthernet0/0 unassigned YES NVRAM administratively down downSerial1/0 unassigned YES manual up upSerial1/1 unassigned YES NVRAM up upSerial1/2 unassigned YES NVRAM administratively down downSerial1/3 unassigned YES NVRAM administratively down downMultilink100 10.10.10.1 YES manual down downLoopback1 1.1.1.1 YES manual up upR1#

PPP Multilink ConfigurationInterface IP-

AddressOK? Metho

d Status Protocol

FastEthernet0/0

unassigned YES Method administratively down down

Serial1/0 unassigned YES manual up upSerial1/1 unassigned YES Method up upSerial1/2 unassigned YES Method administratively down downSerial1/3 unassigned YES Method administratively down downLoopback1 1.1.1.1 YES manual up up

As we see I have Multilink 100 is Down Down; since I need to do same concept on other side R2


Step 4) Now I will go create a Multilink Interface under R2 R2#int Multilink 200 ip address 10.10.10.2 255.255.255.252 ppp multilink ppp multilink group 200 R2#config tEnter configuration commands, one per line. End with CNTL/Z.R2(config)#int multilink 200R2(config-if)#ip address 10.10.10.2 255.255.255.252R2(config-if)#ppp multR2(config-if)#ppp multilinkR2(config-if)#ppp mulR2(config-if)#ppp multilink ?

PPP Multilink Configuration endpoint Configure the local Endpoint Discriminator fragment Specify fragmentation parameters group Put interface in a multilink bundle idle-link Do not transmit fragments over the lowest speed link interleave Allow interleaving of small packets with fragments links Specify the limits on the number of links in a bundle load-threshold Specify threshold used to add/delete links mrru Configure multilink MRRU values multiclass Configure support for Multiclass Multilink queue Specify link queuing parameters slippage Set constraints on amount of data the MLP reassembly engine will buffer per link <cr> R2(config-if)#ppp multilink grR2(config-if)#ppp multilink group 200


Step 5) Now make sure go under each interface of int s1/0 and s1/1 give these commands and make sure use same as group 200R2#int s1/0encapsultion pppppp multilinkppp multilink group 200 int s1/1encapsultion pppppp multilinkppp multilink group 200


R2(config)#int s1/0R2(config-if)#ppp multilinkR2(config-if)#ppp multilink group 200 R2(config-if)#int s1/1R2(config-if)#ppp multilinkR2(config-if)#ppp multilink group 200R2(config-if)#R2(config-if)#


Here is show run on R2 so far: !interface Multilink200 ip address 10.10.10.2 255.255.255.252 ppp multilink ppp multilink group 200!interface FastEthernet0/0 no ip address shutdown duplex half!


interface Serial1/0 no ip address encapsulation ppp serial restart-delay 0 ppp multilink ppp multilink group 200!interface Serial1/1 no ip address encapsulation ppp serial restart-delay 0 ppp multilink ppp multilink group 200


R2#show ip int briefAny interface listed with OK? value "NO" does not have a valid configuration

R2#

Interface IP-Address OK? Method Status ProtocolFastEthernet0/0

unassigned YES unset administratively down

down

Serial1/0 unassigned YES manual up upSerial1/1 unassigned YES unset up upSerial1/2 unassigned YES unset administratively down

down

Serial1/3 unassigned YES unset administratively down

down

Virtual-Access1

unassigned NO TFTP down down

Multilink200

10.10.10.2 YES manual up up

Loopback1 2.2.2.2 YES manual up up


R2#ping 10.10.10.1Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to 10.10.10.1, timeout is 2 seconds:!!!!!Success rate is 100 percent (5/5), round-trip min/avg/max = 36/56/68 ms

PPP Multilink ConfigurationHere are show good show commands:R1#show ppp multilink Multilink100, bundle name is R2 Endpoint discriminator is R2 Bundle up for 00:13:13, total bandwidth 3088, load 1/255 Receive buffer limit 24000 bytes, frag timeout 1000 ms 0/0 fragments/bytes in reassembly list 0 lost fragments, 0 reordered 0/0 discarded fragments/bytes, 0 lost received 0x38 received sequence, 0x38 sent sequence Member links: 2 active, 0 inactive (max not set, min not set) Se1/0, since 00:24:14 Se1/1, since 00:12:46No inactive multilink interfaces

PPP Multilink ConfigurationHere is show command on R2#:R2#show ppp multilinkMultilink200, bundle name is R1 Endpoint discriminator is R1 Bundle up for 00:15:42, total bandwidth 3088, load 1/255 Receive buffer limit 24000 bytes, frag timeout 1000 ms 0/0 fragments/bytes in reassembly list 0 lost fragments, 1 reordered 0/0 discarded fragments/bytes, 0 lost received 0x3C received sequence, 0x3C sent sequence Member links: 2 active, 0 inactive (max not set, min not set) Se1/0, since 00:15:42 Se1/1, since 00:15:16No inactive multilink interfaces


Here is show int S1/0 before the Multi-link as we see it will be double in Multilink: R1#show int s1/0Serial1/0 is up, line protocol is up Hardware is M4T MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation PPP, LCP Open, multilink Open Link is a member of Multilink bundle Multilink100, crc 16, loopback not set Keepalive set (10 sec) Restart-Delay is 0 secs Last input 00:00:56, output 00:00:04, output hang never

PPP Multilink ConfigurationNow If I Go to R1 and ping R2=10.10.10.2 with continues ping and then go and shut down R2 (S1/0) I will see after a delay it will continue to ping:R1#ping 10.10.10.2 repeat 10000000Type escape sequence to abort.Sending 10000000, 100-byte ICMP Echos to 10.10.10.2, timeout is 2 seconds:!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!.............................!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!*Sep 13 18:10:14.419: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/0, changed state to down!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!.


R2#config tEnter configuration commands, one per line. End with CNTL/Z.R2(config)#int s1/0R2(config-if)#shutR2(config-if)#*Sep 13 18:07:27.595: %LINK-5-CHANGED: Interface Serial1/0, changed state to administratively downR2(config-if)#*Sep 13 18:07:27.595: %ENTITY_ALARM-6-INFO: ASSERT INFO Se1/0 Physical Port Administrative State Down*Sep 13 18:07:28.595: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/0, changed state to downR2(config-if)#

PPP Multilink ConfigurationNow lets look at show command on R2#R2#show ppp multilink Multilink200, bundle name is R1 Endpoint discriminator is R1 Bundle up for 00:25:03, total bandwidth 1544, load 1/255 Receive buffer limit 12000 bytes, frag timeout 1000 ms 0/0 fragments/bytes in reassembly list 29 lost fragments, 30 reordered 29/1847 discarded fragments/bytes, 0 lost received 0x2DC received sequence, 0x2A2 sent sequence Member links: 1 active, 1 inactive (max not set, min not set) Se1/1, since 00:24:37 Se1/0 (inactive)No inactive multilink interfaces


As we see we have one active and one inactive, and BW has been dropped to 1544.Lets give no shut on R2# R2#config tEnter configuration commands, one per line. End with CNTL/Z.R2(config)#int s1/0R2(config-if)#no shut


Here is summary on R1 and R2: R1#show runinterface Multilink100 ip address 10.10.10.1 255.255.255.252 ppp multilink ppp multilink group 100!interface FastEthernet0/0 no ip address shutdown duplex half!


interface Serial1/0 no ip address encapsulation ppp serial restart-delay 0 ppp multilink ppp multilink group 100!interface Serial1/1 no ip address encapsulation ppp serial restart-delay 0 ppp multilink ppp multilink group 100

PPP Multilink ConfigurationHere is show run for R2#:interface Multilink200 ip address 10.10.10.2 255.255.255.252 ppp multilink ppp multilink group 200!interface FastEthernet0/0 no ip address shutdown duplex half!interface Serial1/0 no ip address encapsulation ppp serial restart-delay 0 ppp multilink ppp multilink group 200!


interface Serial1/1 no ip address encapsulation ppp serial restart-delay 0 ppp multilink ppp multilink group 200

ASM Educational Center Inc. (ASM)Where Training, Technology & Service Converge

To watch our Cisco CCNA Video Trainings Please Check out the link below:www.asmed.com/c1Phone: (301) 984-7400Rockville,MD