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Cisco IOS Software Releases 12.2 SB

BGP Increased Support of Numbered AS-path Access Lists to 500

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BGP Increased Support of Numbered AS-Path Access Lists to 500

Contents

Restrictions for BGP Increased Support of Numbered AS-Path Access Lists to 500

Information About BGP Increased Support of Numbered AS-Path Access Lists to 500

BGP Autonomous System Path Access Lists

Affected Components

More Information About the Affected Components

Additional References

Related Documents

Standards

MIBs

RFCs

Technical Assistance


BGP Increased Support of Numbered AS-Path Access Lists to 500

First Published: 12.0(22)S
Last Updated: February 28, 2006

The BGP Increased Support of Numbered AS-Path Access Lists to 500 feature is an enhancement for Border Gateway Protocol (BGP) autonomous system access lists. This enhancement increases the maximum number of autonomous system access lists that can be configured with the ip as-path access-list command from 199 to 500.

History for the BGP Increased Support of Numbered AS-Path Access Lists to 500 Feature

Release
Modification

12.0(22)S

This feature was introduced.

12.2(15)T

This feature was integrated into Cisco IOS Release 12.2(15)T.

12.2(18)S

This feature was integrated into Cisco IOS Release 12.2(18)S.

12.2(27)SBC

This feature was integrated into Cisco IOS Release 12.2(27)SBC.

12.2(28)SB

This feature was integrated into Cisco IOS Release 12.2(28)SB.


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Contents

•Restrictions for BGP Increased Support of Numbered AS-Path Access Lists to 500

•Information About BGP Increased Support of Numbered AS-Path Access Lists to 500

•Additional References

Restrictions for BGP Increased Support of Numbered AS-Path Access Lists to 500

The number range for the lat access-list command has been increased from 1 to 199 to 1 to 500. However, the maximum number of access lists that can be configured is still only 199.

Information About BGP Increased Support of Numbered AS-Path Access Lists to 500

To configure this feature, you must understand the following concepts:

•BGP Autonomous System Path Access Lists

•Affected Components

•More Information About the Affected Components

BGP Autonomous System Path Access Lists

BGP autonomous system path access lists are used to filter both inbound and outbound BGP routes. These lists also support regular expressions.

Affected Components

The upgrade introduced by this feature is part of a global enhancement that also affects other components in addition to the ip as-path access-list command. The following components are affected. Each command is cross-referenced to the corresponding command reference page.

•The number range of extended community-lists that can be configured for a route-reflector group with the bgp rr-group command has been increased from 100 to 199 to 100 to 500.

•The number range of access-lists that can be configured for a local-area transport (LAT) node with the lat access-list command has been increased from 1 to 199 to 1 to 500. However, the maximum number of access lists that can be configured is still 199.

•The expanded community list number range for the ip community-list command has been increased from 199 to 500.

•The number range of expanded community lists that can be configured with the ip extcommunity-list command has been increased from 100 to 199 to 100 to 500

•The maximum number of community list numbers that can be configured with the match community command was changed from 199 to 500.

•The maximum number of extended community list numbers that can be configured with the match extcommunity command was changed from 199 to 500.

•The range of expanded community list numbers that can be configured with the set comm-list delete command has been increased from 100 to 199 to 100 to 500.

•The maximum number of numbered access lists that can be configured for the x29 access-list command has been increased from 199 to 500.

More Information About the Affected Components

Refer to the following sections for more information about the commands that have been changed by this enhancement:

BGP Support

The BGP Increased Support of Numbered AS-Path Access Lists to 500 feature is an extension of the BGP routing protocol. For more information about configuring BGP with the ip as-path access-list command, refer to the "Configuring BGP" chapter of the Cisco IOS IP Configuration Guide and the "BGP Commands" chapter in the Cisco IOS IP Command Reference, Volume 2 of 4: Routing Protocols, Release 12.3.

Access-List Support

For more information about configuring IP access lists, refer to the "Configuring IP Services" chapter of the Cisco IOS IP Configuration guide and the Cisco IOS IP Command Reference, Volume 1 of 4: Addressing and Services, Release 12.3.

bgp rr-group Command Support

For more information about configuring route reflectors and route-reflector groups with the bgp rr-group command, refer to the "Configuring BGP" chapter of the Cisco IOS IP Configuration Guide and the "BGP Commands" chapter in the Cisco IOS IP Command Reference, Volume 2 of 4: Routing Protocols, Release 12.3.

ip as-path access-list Command Support

For more information about configuring autonomous-system access-list paths with the ip as-path access-list command, refer to the "Configuring BGP" chapter of the Cisco IOS IP Configuration Guide and the "BGP Commands" chapter in the Cisco IOS IP Command Reference, Volume 2 of 4: Routing Protocols, Release 12.3.

ip community-list Command Support

For more information about configuring community lists with the ip community-list command, refer to the "Configuring BGP" chapter of the Cisco IOS IP Configuration Guide and the "BGP Commands" chapter in the Cisco IOS IP Command Reference, Volume 2 of 4: Routing Protocols, Release 12.3.

ip extcommunity-list Command Support

For more information about configuring extended community lists with the ip extcommunity-list command, refer to the "Configuring BGP" chapter of the Cisco IOS IP Configuration Guide and the "BGP Commands" chapter in the Cisco IOS IP Command Reference, Volume 2 of 4: Routing Protocols, Release 12.3.

lat access-list Command Support

For more information about configuring the local-area transport (LAT) with the lat access-list command, refer to the Cisco IOS Wide-Area Networking Configuration Guide and Cisco IOS Wide-Area Networking Command Reference, Release 12.3.

match community-list Command Support

For more information about configuring extended community lists and route-maps with the match community-list command, refer to the "Configuring BGP" chapter of the Cisco IOS IP Configuration Guide and the "BGP Commands" chapter in the Cisco IOS IP Command Reference, Volume 2 of 4: Routing Protocols, Release 12.3.

match extcommunity-list Command Support

For more information about configuring extended community lists and route-maps with the match extcommunity-list command, refer to the "Configuring BGP" chapter of the Cisco IOS IP Configuration Guide and the "BGP Commands" chapter in the Cisco IOS IP Command Reference, Volume 2 of 4: Routing Protocols, Release 12.3.

set comm-list delete Command Support

For more information about configuring extended community lists and route-maps with the set comm-list delete command, refer to the "Configuring BGP" chapter of the Cisco IOS IP Configuration Guide and the "BGP Commands" chapter in the Cisco IOS IP Command Reference, Volume 2 of 4: Routing Protocols, Release 12.3.

x29 access-list Command Support

For more information about configuring X29 with the x29 access-list command, refer to the Cisco IOS Dial Technologies Configuration Guide and Cisco IOS Dial Technologies Command Reference, Release 12.3.

Additional References

The following sections provide references related to the BGP Increased Support of Numbered AS-Path Access Lists to 500 feature.

Related Documents


Standards

Standard
Title

None

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MIBs

MIB
MIBs Link

None

To locate and download MIBs for selected platforms, Cisco IOS releases, and feature sets, use Cisco MIB Locator found at the following URL:

http://www.cisco.com/go/mibs


RFCs

RFC
Title

None

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Technical Assistance

Description
Link

The Cisco Technical Support & Documentation website contains thousands of pages of searchable technical content, including links to products, technologies, solutions, technical tips, and tools. Registered Cisco.com users can log in from this page to access even more content.

http://www.cisco.com/techsupport



Any Internet Protocol (IP) addresses used in this document are not intended to be actual addresses. Any examples, command display output, and figures included in the document are shown for illustrative purposes only. Any use of actual IP addresses in illustrative content is unintentional and coincidental.

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