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Contents
- IPv6 NSF and Graceful Restart for MP-BGP IPv6 Address Family
- Finding Feature Information
- Information About IPv6 NSF and Graceful Restart for MP-BGP IPv6 Address Family
- Nonstop Forwarding and Graceful Restart for MP-BGP IPv6 Address Family
- How to Configure IPv6 NSF and Graceful Restart for MP-BGP IPv6 Address Family
- Configuring the IPv6 BGP Graceful Restart Capability
- Configuration Examples for IPv6 NSF and Graceful Restart for MP-BGP IPv6 Address Family
- Example: Configuring the IPv6 BGP Graceful Restart Capability
- Additional References
- Feature Information for IPv6: NSF and Graceful Restart for MP-BGP IPv6 Address Family
IPv6 NSF and Graceful Restart for MP-BGP IPv6 Address Family
- Finding Feature Information
- Information About IPv6 NSF and Graceful Restart for MP-BGP IPv6 Address Family
- How to Configure IPv6 NSF and Graceful Restart for MP-BGP IPv6 Address Family
- Configuration Examples for IPv6 NSF and Graceful Restart for MP-BGP IPv6 Address Family
- Additional References
- Feature Information for IPv6: NSF and Graceful Restart for MP-BGP IPv6 Address Family
Finding Feature Information
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.
Information About IPv6 NSF and Graceful Restart for MP-BGP IPv6 Address Family
Nonstop Forwarding and Graceful Restart for MP-BGP IPv6 Address Family
The graceful restart capability is supported for IPv6 BGP unicast, multicast, and VPNv6 address families, enabling Cisco nonstop forwarding (NSF) functionality for BGP IPv6. The BGP graceful restart capability allows the BGP routing table to be recovered from peers without keeping the TCP state.
NSF continues forwarding packets while routing protocols converge, therefore avoiding a route flap on switchover. Forwarding is maintained by synchronizing the FIB between the active and standby RP. On switchover, forwarding is maintained using the FIB. The RIB is not kept synchronized; therefore, the RIB is empty on switchover. The RIB is repopulated by the routing protocols and subsequently informs FIB about RIB convergence by using the NSF_RIB_CONVERGED registry call. The FIB tables are updated from the RIB, removing any stale entries. The RIB starts a failsafe timer during RP switchover, in case the routing protocols fail to notify the RIB of convergence.
The Cisco BGP address family identifier (AFI) model is designed to be modular and scalable, and to support multiple AFI and subsequent address family identifier (SAFI) configurations.
How to Configure IPv6 NSF and Graceful Restart for MP-BGP IPv6 Address Family
Configuring the IPv6 BGP Graceful Restart Capability
DETAILED STEPS
Configuration Examples for IPv6 NSF and Graceful Restart for MP-BGP IPv6 Address Family
Example: Configuring the IPv6 BGP Graceful Restart Capability
In the following example, the BGP graceful restart capability is enabled:
Device# configure terminal Device(config)# router bgp 65000 Device(config-router)# address-family ipv6 Device(config-router-af)# bgp graceful-restart
In the following example, the restart timer is set to 130 seconds:
Device# configure terminal Device(config)# router bgp 65000 Device(config-router)# address-family ipv6 Device(config-router-af)# bgp graceful-restart restart-time 130
In the following example, the stalepath timer is set to 350 seconds:
Device# configure terminal Device(config)# router bgp 65000 Device(config-router)# address-family ipv6 Device(config-router-af)# bgp graceful-restart stalepath-time 350
Additional References
Related Documents
| Related Topic | Document Title |
|---|---|
|
IPv6 addressing and connectivity |
IPv6 Configuration Guide |
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Cisco IOS commands |
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IPv6 commands |
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Cisco IOS IPv6 features |
Cisco IOS IPv6 Feature Mapping |
|
Configuring BGP Nonstop Forwarding Awareness Using BGP Graceful Restart |
"Configuring Advanced BGP Features" in the IP Routing: BGP Configuration Guide |
|
OSPFv3 IPSec ESP Encryption and Authentication |
"Configuring OSPF" module |
MIBs
Technical Assistance
| Description | Link |
|---|---|
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The Cisco Support and Documentation website provides online resources to download documentation, software, and tools. Use these resources to install and configure the software and to troubleshoot and resolve technical issues with Cisco products and technologies. Access to most tools on the Cisco Support and Documentation website requires a Cisco.com user ID and password. |
Feature Information for IPv6: NSF and Graceful Restart for MP-BGP IPv6 Address Family
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.
| Table 1 | Feature Information for IPv6: NSF and Graceful Restart for MP-BGP IPv6 Address Family |
| Feature Name | Releases | Feature Information |
|---|---|---|
|
IPv6: NSF and Graceful Restart for MP-BGP IPv6 Address Family |
12.2(33)SRE 15.0(1)SY 15.0(1)S 15.2(2)S |
The graceful restart capability is supported for IPv6 BGP unicast, multicast, and VPNv6 address families, enabling Cisco NSF functionality for BGP IPv6. The BGP graceful restart capability allows the BGP routing table to be recovered from peers without keeping the TCP state. |
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Any Internet Protocol (IP) addresses and phone numbers used in this document are not intended to be actual addresses and phone numbers. Any examples, command display output, network topology diagrams, and other figures included in the document are shown for illustrative purposes only. Any use of actual IP addresses or phone numbers in illustrative content is unintentional and coincidental.