Cisco Cisco IOS Software Release 12.2(27)SBC
BGP Support for Sequenced Entries in Extended Community Lists
How to Sequence Extended Community Lists
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Cisco IOS Release: Multiple releases (see the Feature History table)
How to Sequence Extended Community Lists
This section contains the following tasks:
•
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Configuring Extended Community-list Sequencing
Perform this task to sequence and resequence extended community lists.
IP Extended Community-list Configuration Mode
This feature introduces IP Extended community-list configuration mode. Both named and numbered
extended community lists can be configured in IP Extended community-list configuration mode. To
enter IP Extended community-list configuration mode, the ip extcommunity-list command is entered
with either the expanded or standard keyword followed by the extended community-list name. This
configuration mode supports all of the functions that are available in global configuration mode. In
addition, you can perform the following operations:
extended community lists can be configured in IP Extended community-list configuration mode. To
enter IP Extended community-list configuration mode, the ip extcommunity-list command is entered
with either the expanded or standard keyword followed by the extended community-list name. This
configuration mode supports all of the functions that are available in global configuration mode. In
addition, you can perform the following operations:
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Configure sequence numbers for extended community list entries
•
Resequence existing sequence numbers for extended community list entries
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Configure an extended community list to use default values
Default Sequence Numbering
Extended community list entries start with the number 10 and increment by 10 for each subsequent entry
when no sequence number is specified, when default behavior is configured, and when an extended
community list is resequenced without specifying the first entry number or the increment range for
subsequent entries.
when no sequence number is specified, when default behavior is configured, and when an extended
community list is resequenced without specifying the first entry number or the increment range for
subsequent entries.
Resequencing Extended Community-lists
Extended community-list entries are sequenced and resequenced on a per-extended community-list
basis. The resequence command can be used without any arguments to set all entries in a list to default
sequence numbering. The resequence command also allows you to set the sequence number of the first
entry and increment range for each subsequent entry. The range of configurable sequence numbers is
from 1 to 2147483647.
basis. The resequence command can be used without any arguments to set all entries in a list to default
sequence numbering. The resequence command also allows you to set the sequence number of the first
entry and increment range for each subsequent entry. The range of configurable sequence numbers is
from 1 to 2147483647.
Restrictions
A sequence number is applied to all extended community-list entries by default regardless of the
configuration mode. Explicit sequencing and resequencing of extended community list entries can only
be configured in IP Extended community-list configuration mode and not in global configuration mode.
configuration mode. Explicit sequencing and resequencing of extended community list entries can only
be configured in IP Extended community-list configuration mode and not in global configuration mode.