- Read Me First
- Cisco BGP Overview
- BGP 4
- Configuring a Basic BGP Network
- BGP 4 Soft Configuration
- BGP Support for 4-byte ASN
- IPv6 Routing: Multiprotocol BGP Extensions for IPv6
- IPv6 Routing: Multiprotocol BGP Link-Local Address Peering
- IPv6 Multicast Address Family Support for Multiprotocol BGP
- Configuring Multiprotocol BGP (MP-BGP) Support for CLNS
- BGP IPv6 Admin Distance
- Connecting to a Service Provider Using External BGP
- BGP Route-Map Continue
- BGP Route-Map Continue Support for Outbound Policy
- Removing Private AS Numbers from the AS Path in BGP
- Configuring BGP Neighbor Session Options
- BGP Neighbor Policy
- BGP Dynamic Neighbors
- BGP Support for Next-Hop Address Tracking
- BGP Restart Neighbor Session After Max-Prefix Limit Reached
- BGP Support for Dual AS Configuration for Network AS Migrations
- Configuring Internal BGP Features
- BGP VPLS Auto Discovery Support on Route Reflector
- BGP FlowSpec Route-reflector Support
- BGP Flow Specification Client
- BGP NSF Awareness
- BGP Graceful Restart per Neighbor
- BGP Support for BFD
- IPv6 NSF and Graceful Restart for MP-BGP IPv6 Address Family
- BGP Persistence
- BGP Link Bandwidth
- Border Gateway Protocol Link-State
- iBGP Multipath Load Sharing
- BGP Multipath Load Sharing for Both eBGP and iBGP in an MPLS-VPN
- Loadsharing IP Packets over More Than Six Parallel Paths
- BGP Policy Accounting
- BGP Policy Accounting Output Interface Accounting
- BGP Cost Community
- BGP Support for IP Prefix Import from Global Table into a VRF Table
- BGP Support for IP Prefix Export from a VRF Table into the Global Table
- BGP per Neighbor SoO Configuration
- Per-VRF Assignment of BGP Router ID
- BGP Next Hop Unchanged
- BGP Support for the L2VPN Address Family
- BGP Event-Based VPN Import
- BGP Best External
- BGP PIC Edge for IP and MPLS-VPN
- Detecting and Mitigating a BGP Slow Peer
- Configuring BGP: RT Constrained Route Distribution
- Configuring a BGP Route Server
- BGP Diverse Path Using a Diverse-Path Route Reflector
- BGP Enhanced Route Refresh
- Configuring BGP Consistency Checker
- BGP—Origin AS Validation
- BGP MIB Support
- BGP 4 MIB Support for Per-Peer Received Routes
- BGP Support for Nonstop Routing (NSR) with Stateful Switchover (SSO) Using L2VPN VPLS
- BGP Support for Nonstop Routing (NSR) with Stateful Switchover (SSO) Using L2VPN VPLS
- BGP NSR Auto Sense
- BGP NSR Support for iBGP Peers
- BGP Graceful Shutdown
- BGP — mVPN BGP sAFI 129 - IPv4
- BGP-MVPN SAFI 129 IPv6
- BFD—BGP Multihop Client Support, cBit (IPv4 and IPv6), and Strict Mode
- BGP Attribute Filter and Enhanced Attribute Error Handling
- BGP Additional Paths
- BGP-Multiple Cluster IDs
- BGP-VPN Distinguisher Attribute
- BGP-RT and VPN Distinguisher Attribute Rewrite Wildcard
- VPLS BGP Signaling
- Multicast VPN BGP Dampening
- BGP—IPv6 NSR
- BGP-VRF-Aware Conditional Advertisement
- BGP—Selective Route Download
- BGP—Support for iBGP Local-AS
- eiBGP Multipath for Non-VRF Interfaces (IPv4/IPv6)
- L3VPN iBGP PE-CE
- BGP NSR Support for MPLS VPNv4 and VPNv6 Inter-AS Option B
- BGP-RTC for Legacy PE
- BGP PBB EVPN Route Reflector Support
- BGP Monitoring Protocol
- VRF Aware BGP Translate-Update
- BGP Support for MTR
- BGP Accumulated IGP
- BGP MVPN Source-AS Extended Community Filtering
- BGP AS-Override Split-Horizon
- BGP Support for Multiple Sourced Paths Per Redistributed Route
- Maintenance Function: BGP Routing Protocol
- Finding Feature Information
- Restrictions on BGP NSR Support for iBGP Peers
- Information About BGP NSR Support for iBGP Peers
- How to Configure BGP NSR Support for iBGP Peers
- Configuration Examples for BGP NSR Support for an iBGP Peer
- Additional References
- Feature Information for BGP NSR Support for iBGP Peers
BGP NSR Support for iBGP Peers
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.
- Finding Feature Information
- Restrictions on BGP NSR Support for iBGP Peers
- Information About BGP NSR Support for iBGP Peers
- How to Configure BGP NSR Support for iBGP Peers
- Configuration Examples for BGP NSR Support for an iBGP Peer
- Additional References
- Feature Information for BGP NSR Support for iBGP Peers
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.
Restrictions on BGP NSR Support for iBGP Peers
This feature applies to iBGP peers configured under IPv4 unicast or IPv4 + label address families.
Information About BGP NSR Support for iBGP Peers
Benefit of 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
Making an iBGP Peer NSR-Capable for the IPv4 Address Family
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
DETAILED STEPS
Making an iBGP Peer NSR-Capable for the VPNv4 Address Family
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
DETAILED STEPS
Making an iBGP Peer NSR Capable at the Router Level
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
DETAILED STEPS
Configuration Examples for BGP NSR Support for an iBGP Peer
Example: Configuring an iBGP Peer To Be NSR Capable
Configuring an iBGP Peer to Be NSR Capable at the Address Family Level
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
Configuring an iBGP Peer to Be NSR Capable at the Router Level
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
Additional References
Related Documents
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 |
Technical Assistance
Description |
Link |
---|---|
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 BGP NSR Support for iBGP Peers
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. The following commands were modified: neighbor ha-mode sso and show ip bgp vpnv4 all sso summary. |