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Contents
BGP NSR provides BGP nonstop routing (NSR) and nonstop forwarding (NSF) in the event of a switchover from an Active RP to the Standby RP. The BGP NSR Support for iBGP Peers feature provides NSR support for iBGP peers configured under the IPv4 unicast or IPv4 + label address family.
Your software release may not support all the features documented in this module. For the latest caveats and feature information, see Bug Search Tool and the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the feature information table at the end of this module.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required.
This feature applies to iBGP peers configured under IPv4 unicast or IPv4 + label address families.
Information About BGP NSR Support for iBGP Peers
Nonstop routing is beneficial for iBGP peers because it reduces the likelihood of dropped packets during switchover from the Active RP to the Standby RP. Switchover occurs when the Active RP fails for some reason, and the Standby RP takes control of Active RP operations.
How to Configure BGP NSR Support for iBGP Peers
1.
enable
2.
configure
terminal
3.
router
bgp
autonomous-system-number
4. address-family ipv4 [unicast | vrf vrf-name]
5.
neighbor
ip-address
remote-as
as-number
6.
neighbor
ip-address
activate
7.
neighbor
ip-address
ha-mode sso
8.
end
1.
enable
2.
configure
terminal
3.
router
bgp
autonomous-system-number
4.
neighbor
ip-address
remote-as
as-number
5.
neighbor
ip-address
ha-mode sso
6. address-family vpnv4 [unicast]
7.
neighbor
ip-address
activate
8.
end
1.
enable
2.
configure
terminal
3.
router
bgp
autonomous-system-number
4.
neighbor
ip-address
remote-as
as-number
5.
neighbor
ip-address
activate
6.
neighbor
ip-address
ha-mode sso
7.
end
8.
show
ip
bgp
sso
summary
Configuration Examples for BGP NSR Support for an iBGP Peer
router bgp 4000 address-family ipv4 unicast neighbor 192.168.1.1 remote-as 4000 neighbor 192.168.1.1 activate neighbor 192.168.1.1 ha-mode sso
router bgp 4000 neighbor 192.168.1.1 remote-as 4000 neighbor 192.168.1.1 activate neighbor 192.168.1.1 ha-mode sso
Related Topic |
Document Title |
---|---|
Cisco IOS commands |
|
BGP commands |
|
BFD commands |
Cisco IOS IP Routing: Protocol Independent Command Reference |
Configuring BFD support for another routing protocol |
Description |
Link |
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The following table provides release information about the feature or features described in this module. This table lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required.
Feature Name |
Releases |
Feature Information |
---|---|---|
BGP NSR Support for iBGP Peers |
BGP NSR provides BGP nonstop routing and nonstop forwarding in the event of a switchover from an active RP to the standby RP. In Cisco IOS XE Release 3.7S, support was added for the Cisco ASR 903 router. The following commands were modified: neighbor ha-mode sso and show ip bgp vpnv4 all sso summary. |