Cisco Cisco IOS Software Release 12.2(27)SBC
BGP Support for Sequenced Entries in Extended Community Lists
How to Sequence Extended Community Lists
3
Cisco IOS Release: Multiple releases (see the Feature History table)
SUMMARY STEPS
1.
enable
2.
configure terminal
3.
ip extcommunity-list {expanded-list-number | expanded list-name | standard-list-number |
standard list-name }
standard list-name }
4.
[sequence-number] { deny [regular-expression] | exit | permit [regular-expression] | resequence
[starting-sequence] [sequence-increment]}
[starting-sequence] [sequence-increment]}
5.
[sequence-number] {deny [rt extcom-value] [soo extcom-value] | exit | permit [rt extcom-value]
[soo extcom-value] | resequence [starting-sequence] [sequence-increment] }
[soo extcom-value] | resequence [starting-sequence] [sequence-increment] }
6.
end
DETAILED STEPS
Command or Action
Purpose
Step 1
enable
Example:
Router> enable
Enables privileged EXEC mode.
•
Enter your password if prompted.
Step 2
configure
terminal
Example:
Router# configure terminal
Enters global configuration mode.
Step 3
ip extcommunity-list
{expanded-list-number |
expanded
list-name | standard-list-number |
standard
list-name }
Example:
Router(config)# ip extcommunity-list standard
NAMED_LIST
Enters IP Extended community-list configuration mode to
create or configure an extended community-list.
create or configure an extended community-list.
•
The example creates a standard named extended
community list.
community list.
Step 4
[sequence-number] { deny [regular-expression] |
exit
| permit [regular-expression] | resequence
[starting-sequence] [sequence-increment]}
Example:
Router(config-extcom-list# 100 deny (A-Z)*
(a-z)*
Configures an expanded extended community list.
•
The example creates an expanded extended community
list entry with the sequence number 100 that will deny
any a route target or route origin pattern that matches
any letter.
list entry with the sequence number 100 that will deny
any a route target or route origin pattern that matches
any letter.