ccie study sheets
TRANSCRIPT
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A
P
P
E
N
D
I
X
G
Key Tables for CCIE Study
Chapter 1
Table 1-2
Ethernet Cabling Types
Type of Cable Pinouts Key Pins Connected
Straight-through
Cross-over
Table 1-3
Ethernet Header Fields
Field Description
Preamble (DIX)
Preamble and Start of Frame Delimiter (802.3)
Type (or Protocol Type) (DIX)
Length (802.3)
Destination Service Access Point (802.2)
Source Service Access Point (802.2)
Control (802.2)
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4 Appendix G: Key Tables for CCIE Study
Organizationally Unique Identifier (SNAP)
Type (SNAP)
Table 1-4
Three Types of Ethernet/MAC Address
Type of Ethernet/MAC
Address Description and Notes
Unicast
Broadcast
Multicast
Table 1-5
I/G and U/L Bits
Field Meaning
I/G
U/L
Table 1-6
Ethernet Type Fields
Type Field Description
Protocol Type
DSAP
SNAP
Table 1-3
Ethernet Header Fields
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Chapter 1 5
Table 1-8
Ethernet Standards
Type of Ethernet General Description
10BASE5
10BASE2
10BASE-T
DIX Ethernet Version 2
IEEE 802.3
IEEE 802.2
IEEE 802.3u
IEEE 802.3z
IEEE 802.3ab
Table 1-9
Switch Internal Processing
Switching Method Description
Store-and-forward
Cut-through
Fragment-free
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6 Appendix G: Key Tables for CCIE Study
Chapter 2
Table 2-2
Private VLAN Communications Between Ports
Description of Who Can Talk to
Whom
Primary VLAN
Ports
Community VLAN
Ports
1
Isolated
VLAN Ports
1
Talk to ports in primary VLAN (promiscuous ports)
Talk to ports in the same secondary VLAN (host ports)
Talks to ports in another secondary VLAN
Table 2-3
VTP Modes and Features
Function
Server
Mode
Client
Mode Transparent Mode
Originates VTP advertisements
Processes received advertisements to update its VLAN configuration
Forwards received VTP advertisements
Saves VLAN configuration in NVRAM or vlan.dat
Can create, modify, or delete VLANs using configuration commands
Table 2-4
VTP Configuration Options
Option Meaning
domain
password
mode
version
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Chapter 2 7
pruning
interface
Table 2-5
Valid VLAN Numbers, Normal and Extended
VLAN Number
Normal or
Extended?
Can Be Advertised
and Pruned by VTP
Versions 1 and 2? Comments
0
1
2–1001
1002–1005
1006–4094
Table 2-6
VLAN Configuration and Storage
Function When in VTP Server Mode
When in VTP Transparent
Mode
Normal-range VLANs can be configured from
Extended-range VLANs can be configured from
VTP and normal-range VLAN configuration commands are stored in
Extended-range VLAN configuration commands stored in
Table 2-4
VTP Configuration Options
Option Meaning
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8 Appendix G: Key Tables for CCIE Study
Table 2-7
Comparing ISL and 802.1Q
Feature ISL 802.1Q
VLANs supported
Protocol defined by
Encapsulates original frame or inserts tag
Supports native VLAN
Table 2-9
Trunking Configuration Options That Lead to a Working Trunk
Configuration Command on
One Side
1
Short Name Meaning
To Trunk, Other
Side Must Be
switchport mode trunk
switchport mode trunk
;
switchport nonegotiate
switchport mode dynamic desirable
switchport mode dynamic auto
switchport mode access
switchport mode access
;
switchport nonegotiate
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Chapter 3 9
Chapter 3
Table 3-2
Three Major 802.1d STP Process Steps
Major Step Description
Elect the root switch
Determine each switch’s Root Port
Determine the Designated Port for each segment
Table 3-3
Default Port Costs According to IEEE 802.1d
Speed of Ethernet Original IEEE Cost Revised IEEE Cost
10 Mbps
100 Mbps
1 Gbps
10 Gbps
Table 3-4
IEEE 802.1d Spanning Tree Interface States
State
Forwards Data
Frames?
Learn Source MACs of
Received Frames? Transitory or Stable State?
Blocking
Listening
Learning
Forwarding
Disabled
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10 Appendix G: Key Tables for CCIE Study
Table 3-5
PortFast, UplinkFast, and BackboneFast
Feature Requirements for Use How Convergence Is Optimized
PortFast
UplinkFast
BackboneFast
Table 3-7
PAgP and LACP Configuration Settings and Recommendations
PAgP Setting LACP 802.1AD Setting Action
On On
Off Off
Auto Passive
Desirable Active
Table 3-8
RSTP Link Types
Link Type Description
Point to point
Shared
Edge
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Chapter 3 11
Table 3-9
RSTP and STP Port States
Administrative State STP State (802.1d) RSTP State (802.1w)
Disabled
Blocking
Listening
Learning
Forwarding
Table 3-10
RSTP and STP Port Roles
RSTP Role Definition
Root Port
Designated Port
Alternate Port
Backup Port
Table 3-12
Protocols and Standards for Chapter 3
Name Standards Body
RSTP
MST
STP
LACP
Dot1Q trunking
PVST+
RPVST+
PagP
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12 Appendix G: Key Tables for CCIE Study
Chapter 4
Table 3-13
IEEE 802.1d STP Timers
Timer Default Purpose
Hello
Forward Delay
Maxage
Table 4-2
Classful Network Review
Class of
Address
Size of Network
and Host Parts of
the Addresses
Range of
First Octet
Values
Default Mask for
Each Class of
Network
Identifying Bits at
Beginning of
Address
A
B
C
D
E
Table 4-12
RFC 1918 Private Address Space
Range of IP Addresses Class of Networks Number of Networks
10.0.0.0 to 10.255.255.255
172.16.0.0 to 172.31.255.255
192.168.0.0 to 192.168.255.255
Table 4-13
NAT Terminology
Name
Location of Host Represented by
Address
IP Address Space in Which Address
Exists
Inside Local address
Inside Global address
Outside Local address
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Chapter 4 13
Name
Location of Host Represented by
Address
IP Address Space in Which Address
Exists
Outside Global address
Table 4-14
Variations on NAT
Name Function
Static NAT
Dynamic NAT
Dynamic NAT with overload (PAT)
NAT for overlapping address
Table 4-15
Protocols and Standards for Chapter 4
Name Standardized In
IP
Subnetting
NAT
Private addressing
CIDR
Table 4-17
IP Header Fields
Field Meaning
Version
Header Length
Table 4-13
NAT Terminology
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14 Appendix G: Key Tables for CCIE Study
Field Meaning
DS Field
Packet Length
Identification
Flags
Fragment Offset
Time to Live (TTL)
Protocol
Header Checksum
Source IP Address
Destination IP Address
Optional Header Fields and Padding
Table 4-18
IP Protocol Field Values
Protocol Name Protocol Number
ICMP
TCP
UDP
EIGRP
OSPF
PIM
Table 4-17
IP Header Fields
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Chapter 5 15
Chapter 5
Table 5-2
Comparing RARP, BOOTP, and DHCP
Feature RARP BOOTP DHCP
Relies on server to allocate IP addresses
Encapsulates messages inside IP and UDP, so they can be forwarded to a remote server
Client can discover its own mask, gateway, DNS, and download server
Dynamic address assignment from a pool of IP addresses, without requiring knowledge of client MACs
Allows temporary lease of IP address
Includes extensions for registering client’s FQDN with a DNS
Table 5-3
SNMP Version Summaries
SNMP Version Description
1
2
2c
3
Table 5-4
SNMP Protocol Messages (RFCs 1157 and 1905)
Message Initial Version
Response Message Typically Sent By Main Purpose
Get
GetNext
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16 Appendix G: Key Tables for CCIE Study
Message Initial Version
Response Message Typically Sent By Main Purpose
GetBulk
Response
Set
Trap
Inform
Table 5-5
Protocols and Standards for Chapter 5
Name Standardized In
ARP
Proxy ARP
RARP
BOOTP
DHCP
DHCP FQDN option
HSRP
VRRP
GLBP
Table 5-4
SNMP Protocol Messages (RFCs 1157 and 1905)
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Chapter 6 17
Chapter 6
CDP
NTP
Syslog
SNMP Version 1
SNMP Version 2
SNMP Version 2c
SNMP Version 3
Table 6-2
Matching Logic and Load-Balancing Options for Each Switching Path
Switching PathTables that Hold theForwarding Information Load-Balancing Method
Process switching
Fast switching
CEF
Table 6-3
Facts and Behavior Related to InARP
Fact/Behavior Point-to-Point Multipoint or Physical
Does InARP require LMI?
Is InARP enabled by default?
Can InARP be disabled?
Ignores received InARP messages?
Table 5-5
Protocols and Standards for Chapter 5
Name Standardized In
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18 Appendix G: Key Tables for CCIE Study
Chapter 7
Table 6-5
MLS Layer 3 Interfaces
Interface Forwarding to Adjacent Device Configuration Requirements
VLAN interface
Physical (routed) interface
PortChannel (switched) interface
PortChannel (routed) interface
Table 6-7
Protocols and Standards for Chapter 6
Name Standardized In
Address Resolution Protocol (ARP)
Reverse Address Resolution Protocol (RARP)
Frame Relay Inverse ARP (InARP)
Frame Relay Multiprotocol Encapsulation
Differentiated Services Code Point (DSCP)
Table 7-2
EIGRP Feature Summary
Feature Description
Transport
Metric
Hello interval
Hold timer
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Chapter 7 19
Update destination address
Full or partial updates
Authentication
VLSM/classless
Route Tags
Next-hop field
Manual route summarization
Multiprotocol
Table 7-3
EIGRP Features Related to Convergence
EIGRP Convergence Function Description
Reported distance (RD)
Feasible distance (FD)
Feasibility condition
Successor route
Feasible successor (FS)
Input event
Local computation
Table 7-2
EIGRP Feature Summary
Feature Description
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20 Appendix G: Key Tables for CCIE Study
Table 7-4
Options on the
eigrp stub Command
Option This Router Is Allowed To. . .
connected
summary
static
redistributed
receive-only
Table 7-5 EIGRP Route Load-Balancing Commands
Router EIGRP
Subcommand Meaning
variance
maximum-paths {1..6}
traffic-share balanced
traffic-share min
traffic-share min across-interfaces
No traffic-share command configured
Table 7-7 EIGRP Message Summary
EIGRP
Packet Purpose
Hello
Update
Ack
Query
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Chapter 8 21
Chapter 8
1 Default on Frame Relay point-to-point subinterfaces.
2 Default on Frame Relay physical and multipoint subinterfaces.
Reply
Goodbye
Table 8-2 OSPF Messages
Message Description
Hello
Database Description (DD or DBD)
Link-State Request (LSR)
Link-State Update (LSU)
Link-State Acknowledgement (LSAck)
Table 8-3 OSPF Network Types
Interface Type
Uses
DR/
BDR?
Default
Hello
Interval
Requires a
neighbor
Command?
More than Two Hosts
Allowed in the Subnet?
Broadcast
Point-to-point1
Nonbroadcast2 (NBMA)
Point-to-multipoint
Point-to-multipoint nonbroadcast
Loopback
Table 7-7 EIGRP Message Summary
EIGRP
Packet Purpose
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22 Appendix G: Key Tables for CCIE Study
Table 8-4 OSPF LSA Types
LSA
Type Common Name Description
1 Router
2 Network
3 Net Summary
4 ASBR Summary
5 AS External
6 Group Membership
7 NSSA External
8 External Attributes
9–11 Opaque
Table 8-5 OSPF Stubby Area Types
Area Type
Stops Injection of
Type 5 LSAs?
Stops Injection of
Type 3 LSAs?
Allows Creation of Type 7 LSAs
Inside the Area?
Stub
Totally stubby
Not-so-stubby area (NSSA)
Totally NSSA
Table 8-6 Stub Area Configuration Options
Stub Type Router OSPF Subcommand
NSSA
Totally NSSA
Stub
Totally stubby
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Chapter 8 23
Table 8-7 OSPF Authentication Types
Type Meaning
Enabling Interface
Subcommand
Authentication Key Configuration Interface
Subcommand
0
1
2
Table 8-8 Effect of the area authentication Command on OSPF Interface Authentication Settings
area authentication Command Interfaces in That Area Default to Use. . .
Type 0
Type 1
Type 2
Table 8-9 Configuring OSPF Authentication on Virtual Links
Type Command Syntax for Virtual Links
0
1
2
Table 8-10 Protocols and Corresponding Standards for Chapter 8
Name Standard
OSPF Version 2
The OSPF Opaque LSA Option
The OSPF Not-So-Stubby Area (NSSA) Option
OSPF Stub Router Advertisement
Traffic Engineering (TE) Extensions to OSPF Version 2
Graceful OSPF Restart
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24 Appendix G: Key Tables for CCIE Study
Table 8-12 OSPF Timer Summary
Timer Meaning
MaxAge
LSRefresh
Hello
Dead
Wait
Retransmission
Inactivity
Poll Interval
Flood (Pacing)
Retransmission (Pacing)
Lsa-group (Pacing)
Table 8-13 OSPF Neighbor States
State Meaning
Down
Attempt
Init
2WAY
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Chapter 9 25
Chapter 9
ExStart
Exchange
Loading
Full
Table 8-14 OSPF Numeric Ranges
Setting Range of Values
Single interface cost
Complete route cost
Infinite route cost
Reference bandwidth (units: Mbps)
OSPF PID
Table 9-6 Administrative Distances
Route Type Administrative Distance
Connected
Static
EIGRP summary route
EBGP
EIGRP (internal)
IGRP
OSPF
IS-IS
RIP
EIGRP (external)
iBGP
Unreachable
Table 8-13 OSPF Neighbor States
State Meaning
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26 Appendix G: Key Tables for CCIE Study
* OSPF uses cost 20 when redistributing from an IGP, and cost 1 when redistributing from BGP.
* For E2 routes whose metric ties, OSPF also checks the cost to the advertising ASBR.
Table 9-7 Default Metrics and Route Metric Types in IGP Route Redistribution
IGP into Which Routes Are Redistributed
Default Metric Default (and Possible) Metric Types
RIP
EIGRP
OSPF
IS-IS
Table 9-8 IGP Order of Precedence for Choosing Routes Before Considering the Metric
IGP Order of Precedence of Metric
RIP
EIGRP
OSPF
IS-IS L1, L2, external
Table 9-9 OSPF Route Summarization Commands
Where Used Command
ASBR
ABR
Table 9-10 Four Methods for Learning Default Routes
Feature RIP EIGRP OSPF
Static route to 0.0.0.0, with the redistribute static command
The default-information originate command
The ip default-network command
Using summary routes
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Chapter 10 27
Chapter 10
*Cisco changed the IOS default for BGP auto-summary to be disabled as of Cisco IOS Software Release 12.3.
Table 10-2 BGP Neighbor Summary Table
BGP Feature Description and Values
TCP port
Setting the keepalive interval and hold time (using the bgp timers keepalive holdtime router subcommand or neighbor timers command, per neighbor)
What makes a neighbor internal BGP (iBGP)?
What makes a neighbor external BGP (eBGP)?
How is the source IP address used to reach a neighbor determined?
Defined with the neighbor update-source command; or, by default, uses the outgoing interface IP address for the route used to reach the neighbor
How is the destination IP address used to reach a neighbor determined?
Explicitly defined on the neighbor command
Auto-summary* Off by default, enabled with auto-summary router subcommand
Neighbor authentication MD5 only, using the neighbor password command
Table 10-3 BGP Neighbor States
State
Listen for
TCP?
Initiate
TCP?
TCP
Up?
Open
Sent?
Open
Received? Neighbor Up?
Idle
Connect
Active
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28 Appendix G: Key Tables for CCIE Study
*NEXT_HOP is a BGP PA that denotes the next-hop IP address that should be used to reach the NLRI.
Open sent
Open confirm
Established
Table 10-4 BGP Message Types
Message Purpose
Open
Keepalive
Update
Notification
Table 10-5 Key Features of the BGP network Command
Feature Implication
No mask is configured
Matching logic with no auto-summary configured
Matching logic with auto-summary configured
NEXT_HOP of BGP route added to the BGP table*
Maximum number injected by the network command into one BGP process
Purpose of the route-map option on the network command
Table 10-3 BGP Neighbor States
State
Listen for
TCP?
Initiate
TCP?
TCP
Up?
Open
Sent?
Open
Received? Neighbor Up?
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Chapter 10 29
*Rule is relaxed or changed as a result of using route reflectors or confederations.
Table 10-6 Summary: Injecting Summary Routes in BGP
Command
Component Subnets
Removed Routes It Can Summarize
auto-summary (with redistribution)
aggregate-address
auto-summary (with the network command)
Table 10-7 BGP ORIGIN Codes
ORIGIN Code
Cisco IOS
Notation
Used for Routes Injected Due to the Following
Commands
IGP i
EGP e
Incomplete ?
Table 10-8 Summary of Rules Regarding Which Routes BGP Does Not Include in an Update
iBGP and/or eBGP Routes Not Taken from the BGP Table
Routes that are not considered “best”
Routes matched by a deny clause in an outbound BGP filter
iBGP-learned routes*
Routes whose AS_PATH includes the ASN of the eBGP peer to which a BGP Update will be sent
Table 10-9 Conditions for Changing the NEXT_HOP PA
Type of
Neighbor Default Action for Advertised Routes
Command to Switch to
Other Behavior
iBGP
eBGP
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30 Appendix G: Key Tables for CCIE Study
Table 10-10 BGP Subcommands Used for Confederations
Purpose Command
Define a router’s sub-AS
Define the true AS
To identify a neighboring AS as another sub-AS
Table 10-11 Types of Neighbors to Which Prefixes Are Reflected
Location from Which a
Prefix Is Learned
Are Routes Advertised to
Clients?
Are Routes Advertised to
Nonclients?
Client
Nonclient
eBGP
Table 10-13 BGP PAs
Path Attribute Description Characteristics
AS_PATH
NEXT_HOP
AGGREGATOR
ATOMIC_AGGREGATE
ORIGIN
Path Attribute
ORIGINATOR_ID
CLUSTER_LIST
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Chapter 11 31
Chapter 11
Table 10-14 Summary: Methods to Introduce Entries into the BGP Table
Method Summary Description
network command
Redistribution
Manual summarization
default-information originate
neighbor default-originate
Table 11-2 NLRI Filtering Tools
BGP Subcommand
Commands
Referenced by
neighbor Command What Can Be Matched
neighbor distribute-list (standard ACL)
access-list, ip access-list
neighbor distribute-list (extended ACL)
access-list, ip access-list
neighbor prefix-list ip prefix-list
neighbor filter-list ip as-path access-list
neighbor route-map route-map
Table 11-3 AS_PATH Segment Types
Component Description
Delimiters
Between ASNs
Character
Enclosing the
Segment
AS_SEQUENCE
AS_SET
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32 Appendix G: Key Tables for CCIE Study
1 Not advertised outside the confederation.
1 If preceded by a value in parentheses, the logic applies to the preceding string listed inside the parentheses, and not just to the preceding character.
2 This character is an underscore.
AS_CONFED_SEQ1
AS_CONFED_SET1
Table 11-4 Regex Metacharacters Useful for AS_PATH Matching
Metacharacter Meaning
^
$
|
_
.
?
*
+
(string)
[string]
Table 11-5 Example AS_PATH Regex and Their Meanings
Example Regex What Type of AS_PATH It Would Match
.*
^$
Table 11-3 AS_PATH Segment Types
Component Description
Delimiters
Between ASNs
Character
Enclosing the
Segment
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Chapter 11 33
^123$
^123
^123.
^123+_
^123*
^123*_
^123?
^123_45$
^123_.*_45$
^123_.*45
(^123_45$)|(^123_.*_45$)
^123_45$|^123_.*_45$
^123(_[0..9]+)*_45
Table 11-5 Example AS_PATH Regex and Their Meanings
Example Regex What Type of AS_PATH It Would Match
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34 Appendix G: Key Tables for CCIE Study
^{123
[(]303.*[)]
Table 11-6 Definitions of Path Attribute Classification Terms
Term
All BGP Software
Implementations
Must Support It
Must Be Sent
in Each BGP
Update
Silently Forwarded If Not
Supported
Well-known mandatory
Well-known discretionary
Optional transitive
Optional nontransitive
Table 11-9 Proprietary Features and BGP Path Attributes that Affect the BGP Decision Process
PA/Other Description BGP PA Type
NEXT_HOP
Weight1
LOCAL_PREF
AS_PATH length
ORIGIN
MULTI_EXIT_DISC (MED)
Neighbor Type1
Table 11-5 Example AS_PATH Regex and Their Meanings
Example Regex What Type of AS_PATH It Would Match
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Chapter 11 35
1 This value is not a BGP PA.
IGP metric to reach
NEXT_HOP1
BGP RID1
Table 11-10 Key Features of Administrative Weight
Feature Description
Is it a PA?
Purpose
Scope
Default
Changing the defaults
Range
Which is best?
Configuration
Table 11-11 Key Features of LOCAL_PREF
Feature Description
PA?
Purpose
Scope
Default
Changing the default
Range
Table 11-9 Proprietary Features and BGP Path Attributes that Affect the BGP Decision Process
PA/Other Description BGP PA Type
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36 Appendix G: Key Tables for CCIE Study
Which is best?
Configuration
Table 11-12 Features that Impact the Total Number of ASs in the AS_PATH Length Calculation
Feature Description
AS_SET
Confederations
aggregate-address command
neighbor remove-private-as command
neighbor local-as no-prepend command
AS_PATH prepending
bgp bestpath as-path ignore command
Table 11-13 Key Features of MED
Feature Description
Is it a PA?
Purpose
Table 11-11 Key Features of LOCAL_PREF
Feature Description
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Chapter 11 37
1 LOCAL_AS is the Cisco term; RFC 1997 defines this value as NO_EXPORT_SUBCONFED.
Scope
Default
Changing the default
Range
Which is best?
Configuration
Table 11-15 Comparing Standard and Extended Community List
Feature Standard Extended
List numbers
Can match multiple communities in a single command?
Can match the COMMUNITY PA with regular expressions
More than 16 lines in a single list?
Table 11-16 COMMUNITY Values Used Specifically for NLRI Filtering
Name Value Meaning
NO_EXPORT FFFF:FF01
NO_ADVERT FFFF:FF02
LOCAL_AS1 FFFF:FF03
Table 11-13 Key Features of MED
Feature Description
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38 Appendix G: Key Tables for CCIE Study
Chapter 12
*The terms “CS0” and “Default” both refer to a binary DSCP of 000000, but most Cisco IOS commands allow only the keyword “default” to represent this value.
Table 12-2 IP Precedence Values and Names
Name Decimal Value Binary Value
Routine
Priority
Immediate
Flash
Flash Override
Critic/Critical
Internetwork Control
Network Control
Table 12-3 Default and Class Selector DSCP Values
DSCP Class Selector Names
Binary DSCP Values
IPP Binary Values IPP Names
Default/CS0*
CS1
CS2
CS3
CS4
CS5
CS6
CS7
Table 12-4 Assured Forwarding DSCP Values: Names, Binary Values, and Decimal Values
Queue Class Low Drop Probability Medium Drop Probability High Drop Probability
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Chapter 12 39
1
2
4
5
Table 12-5 Marking Field Summary
Field Location Length
IP Precedence (IPP)
IP DSCP
DS field
ToS byte
CoS
Discard Eligible (DE)
Cell Loss Priority (CLP)
MPLS Experimental
Table 12-7 set Configuration Command Reference for CB Marking
Command Function
set [ip] precedence ip-precedence-value
set [ip] dscp ip-dscp-value
set cos cos-value
set qos-group group-id
set atm-clp
set fr-de
Table 12-4 Assured Forwarding DSCP Values: Names, Binary Values, and Decimal Values
Queue Class Low Drop Probability Medium Drop Probability High Drop Probability
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40 Appendix G: Key Tables for CCIE Study
Also note that Cisco recommends not to use more than four or five different service classes for data traffic. By using more classes, the difference in behavior between the various classes tends to blur. For the same reason, do not give too many data service classes high-priority service
Chapter 13
Table 12-9 RFC-Recommended Values for Marking
Type of Traffic CoS IPP DSCP
Voice payload
Video payload
Voice/video signaling
Mission-critical data
Transactional data
Bulk data
Best effort
Scavenger (less than best effort)
Table 12-10 Where to Use the qos pre-classify Command
Configuration Command Under Which qos pre-classify Is Configured VPN Type
interface tunnel
interface virtual-template
crypto map
Table 13-2 Key Comparison Points for Queuing Tools
Feature Definition
Classification
Drop policy
Scheduling
Maximum number of queues
Maximum queue length
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Chapter 13 41
1 WFQ can be used in the class-default queue or in all CBWFQ queues in 7500 series routers.
Table 13-3 CBWFQ Functions and Features
CBWFQ Feature Description
Classification
Drop policy
Number of queues
Maximum queue length
Scheduling inside a single queue
Scheduling among all queues
Table 13-5 Reference for CBWFQ Bandwidth Reservation
MethodAmount of Bandwidth Reserved by the bandwidth Command
The Sum of Values in a Single Policy Map Must Be <= . . .
Explicit bandwidth
Percent
Remaining percent
Table 13-6 Queuing Protocol Comparison
Feature CBWFQ LLQ
Includes a strict-priority queue
Polices priority queues to prevent starvation
Reserves bandwidth per queue
Includes robust set of classification fields
Classifies based on flows
Supports RSVP
Maximum number of queues
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42 Appendix G: Key Tables for CCIE Study
Chapter 14
Table 13-7 WRED Discard Categories
Average Queue Depth Versus Thresholds Action
WRED Name for Action
Average < minimum threshold
Minimum threshold < average depth < maximum threshold
Average depth > maximum threshold
Table 14-2 Shaping Terminology
Term Definition
Tc
Bc
CIR
Shaped rate
Be
Table 14-3 CB Shaping Calculation of Default Variable Settings
Variable Rate <= 320 kbps Rate > 320 kbps
Bc
Be
Tc
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Chapter 14 43
Table 14-4 Policing Actions Used CB Policing
Command Option Mode and Function
drop
set-dscp-transmit
set-prec-transmit
set-qos-transmit
set-clp-transmit
set-fr-de
transmit
Table 14-5 Single-Rate, Two-Color Policing Logic for Categorizing Packets
Category Requirements Tokens Drained from Bucket
Conform
Exceed
Table 14-6 Single-Rate Three-Color Policing Logic for Categorizing Packets
Category Requirements Tokens Drained from Bucket
Conform
Exceed
Violate
Table 14-7 Two-Rate, Three-Color Policing Logic for Categorizing Packets
Category Requirements Tokens Drained from Bucket
Conform
Exceed
Violate
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44 Appendix G: Key Tables for CCIE Study
Chapter 15
Table 14-8 Setting CB Policing Bc and Be Defaults
Type of Policing Configuration Telltale Signs in the police Command Defaults
Single rate, two color
Single rate, three color
Dual rate, three color
Table 15-2 HDLC and PPP Comparisons
Feature HDLC PPP
Error detection?
Error recovery?
Standard Protocol Type field?
Default on IOS serial links?
Supports synchronous and asynchronous links?
Table 15-3 PPP LCP Features
Function Description
Link Quality Monitoring (LQM)
Looped link detection
Layer 2 load balancing
Authentication
Table 15-4 Point-to-Point Payload Compression Tools: Feature Comparison
Feature Stacker MPPC Predictor
Uses LZ algorithm?
Uses Predictor algorithm?
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Chapter 15 45
Supported on HDLC?
Supported on PPP?
Supported on Frame Relay?
Supports ATM and ATM-to-Frame Relay Service Interworking (using MLP)?
Table 15-5 Frame Relay LMI Types
LMI Type Source DocumentCisco IOS lmi-type Parameter
Allowed DLCI Range (Number)
LMI DLCI
Cisco
ANSI
ITU
Table 15-6 Frame Relay FECN, BECN, and DE Summary
Bit Meaning When Set Where Set
FECN
BECN
DE
Table 15-8 Comparing Legacy and Interface FRF.12
Feature Legacy FRF.12 FRF.12 on the Interface
Requires FRTS?
Interleaves by feeding Dual FIFO interface high queue from a shaping PQ?
Interleaves by using either Dual FIFO or a configured LLQ policy-map on the physical interface.
Config mode for the frame-relay fragment command.
Table 15-4 Point-to-Point Payload Compression Tools: Feature Comparison
Feature Stacker MPPC Predictor
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46 Appendix G: Key Tables for CCIE Study
Chapter 16
Table 16-2 Some Well-Known Reserved Multicast Addresses
Address Usage
224.0.0.1
224.0.0.2
224.0.0.4
224.0.0.5
224.0.0.6
224.0.0.9
224.0.0.10
224.0.0.13
224.0.0.22
224.0.0.25
224.0.1.39
224.0.1.40
Table 16-3 Multicast Address Ranges and Their Use
Multicast Address Range Usage
224.0.0.0 to 239.255.255.255
224.0.0.0 to 224.0.0.255
224.0.1.0 to 224.0.1.255
232.0.0.0 to 232.255.255.255
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Chapter 16 47
233.0.0.0 to 233.255.255.255
239.0.0.0 to 239.255.255.255
Remaining ranges of addresses in the multicast address space
Table 16-4 Important IGMPv2 Timers
Timer Usage Default Value
Query Interval
Query Response Interval
Group Membership Interval
Other Querier Present Interval
Last Member Query Interval
Version 1 Router Present Timeout
Table 16-3 Multicast Address Ranges and Their Use
Multicast Address Range Usage
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Chapter 17
Table 16-5 CGMP Messages
Type
Group Destination Address
Unicast Source Address Meaning
Join
Leave
Join
Leave
Leave
Leave
Table 17-2 Summary of PIM-DM Messages
PIM Message Definition
Hello
Prune
State Refresh
Assert
Prune Override (Join)
Graft/Graft-Ack
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Chapter 17 49
Table 17-3 Comparison of Methods of Finding the RP
Method RP Details Mapping InfoRedundant RP Support?
Load Sharing of One Group?
Static
Auto-RP
BSR
Anycast RP
Table 17-4 Comparison of PIM-DM and PIM-SM
Feature PIM-DM PIM-SM
Destination address for Version 1 Query messages, and IP protocol number
Destination address for Version 2 Hello messages, and IP protocol number
Default interval for Query and Hello messages
Default Holdtime for Versions 1 and 2
Rule for electing a designated router on a multiaccess network
Main design principle
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50 Appendix G: Key Tables for CCIE Study
SPT or RPT?
Uses Join/Prune messages?
Uses Graft and Graft-Ack messages?
Uses Prune Override mechanism?
Uses Assert message?
Uses RP?
Uses source registration process?
Table 17-7 mroute Flags
Flag Description
D (dense)
S (sparse)
C (connected)
L (local)
P (pruned)
R (RP-bit set)
F (register flag)
T (SPT-bit set)
Table 17-4 Comparison of PIM-DM and PIM-SM
Feature PIM-DM PIM-SM
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Chapter 18 51
Chapter 18
1 Radius originally defined port 1645 as the well-known port, which was later changed to port 1812.
J (join SPT)
Table 18-2 Comparing RADIUS and TACACS+ for Authentication
RADIUS TACACS+
Scope of Encryption: packet payload or just the password
Layer 4 Protocol
Well-Known Port/IOS Default Port Used for authentication
Standard or Cisco-Proprietary
Table 18-3 Authentication Methods for Login and Enable
Method Meaning
group radius
group tacacs+
group name
Table 17-7 mroute Flags
Flag Description
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52 Appendix G: Key Tables for CCIE Study
1 Cannot be used for enable authentication.
enable
line1
local
local-case
none
Table 18-4 Port Security Configuration Commands
Command Purpose
switchport mode {access | trunk}
switchport port-security [maximum value]
switchport port-security mac-address mac-address [vlan {vlan-id | {access | voice}}
switchport port-security mac-address sticky
switchport port-security [aging] [violation {protect | restrict | shutdown}]
Table 18-5 Cisco IOS Switch Dynamic ARP Inspection Commands
Command Purpose
ip arp inspection vlan vlan-range
Table 18-3 Authentication Methods for Login and Enable
Method Meaning
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Chapter 18 53
[no] ip arp inspection trust
ip arp inspection filter arp-acl-name vlan vlan-range [static]
ip arp inspection validate {[src-mac] [dst-mac] [ip]}
ip arp inspection limit {rate pps [burst interval seconds] | none}
Table 18-8 Examples of ACL ACE Logic and Syntax
Access List Statement What It Matches
deny ip any host 10.1.1.1
deny tcp any gt 1023 host 10.1.1.1 eq 23
deny tcp any host 10.1.1.1 eq 23
deny tcp any host 10.1.1.1 eq telnet
deny udp 1.0.0.0 0.255.255.255 lt 1023 any
Table 18-9 IP ACE Port Matching
Keyword Meaning
gt
lt
Table 18-5 Cisco IOS Switch Dynamic ARP Inspection Commands
Command Purpose
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54 Appendix G: Key Tables for CCIE Study
Chapter 19
eq
ne
range x-y
Table 19-2 MPLS LSR Terminology Reference
LSR Type Actions Performed by This LSR Type
Label Switch Router (LSR)
Edge LSR (E-LSR)
Ingress E-LSR
Egress E-LSR
ATM-LSR
ATM E-LSR
Table 19-3 MPLS Header Fields
Field Length (Bits) Purpose
Label
Experimental (EXP)
Bottom-of-Stack (S)
Time-to-Live (TTL)
Table 18-9 IP ACE Port Matching
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Chapter 19 55
Table 19-4 LDP Reference
LDP Feature LDP Implementation
Transport protocols
Port numbers
Hello destination address
Who initiates TCP connection
TCP connection uses this address
LDP ID determined by these rules, in order or precedence
Table 19-5 Control Protocols Used in Various MPLS Applications
Application FECControl Protocol Used to Exchange FEC-to-Label Binding
Unicast IP routing
Multicast IP routing
VPN
Traffic engineering
MPLS QoS
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Chapter 20
Table 20-2 IPv6 Address Types
Address Type Range Application
Aggregatable global unicast
Multicast
Anycast
Link-local unicast
Solicited-node multicast
Table 20-3 IPv6 Multicast Well-Known Addresses
Function Multicast Group IPv4 Equivalent
All hosts
All Routers
OSPFv3 routers
OSPFv3 designated routers
EIGRP routers
PIM routers
Table 20-4 ND Functions in IPv6
Message Type
Information Sought or Sent Source Address Destination Address
ICMP Type, Code
Router Advertisement (RA)
134, 0
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Chapter 20 57
Router Solicitation (RS)
133, 0
Message Type ICMP Type, Code
Neighbor Solicitation (NS)
135, 0
Neighbor Advertise-ment (NA)
136, 0
Redirect 137, 0
Table 20-5 OSPFv3 LSA Types
LSA Type Common Name Description
Flooding Scope
1
2
3
Table 20-4 ND Functions in IPv6
Message Type
Information Sought or Sent Source Address Destination Address
ICMP Type, Code
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58 Appendix G: Key Tables for CCIE Study
4
5
8
9
Table 20-6 Summary of Tunneling Methods
Tunnel Mode Topology and Address Space Applications
Automatic 6to4
Manually configured
IPv6 over IPv4 GRE
ISATAP
Automatic IPv4-compatible
Table 20-5 OSPFv3 LSA Types
LSA Type Common Name Description
Flooding Scope
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Chapter 20 59
Table 20-7 Cisco IOS Tunnel Modes and Destinations
Tunnel Type Tunnel Mode Destination
Manual
GRE over IPv4
Automatic 6to4
ISATAP
Automatic IPv4-compatible
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