Cisco Cisco IOS Software Release 12.0(22)S
BGP Soft Reset Enhancement
Supported Platforms
3
Cisco IOS Release 12.0(22)S
Requires No Preconfiguration
Because support for the soft reset using the route refresh capability is included in this release of the Cisco IOS
software, no further router configuration is required. You can initiate a soft inbound reset using only the
clear ip bgp in command.
software, no further router configuration is required. You can initiate a soft inbound reset using only the
clear ip bgp in command.
Requires No Additional Memory Resources
Unlike a soft reset using the stored inbound routing table updates provided by the neighbor
soft-reconfiguration command, when both BGP peers support the route refresh capability inbound
routing table updates are not stored in the local BGP router. The soft reset requests are exchanged
dynamically, and no additional memory is required.
soft-reconfiguration command, when both BGP peers support the route refresh capability inbound
routing table updates are not stored in the local BGP router. The soft reset requests are exchanged
dynamically, and no additional memory is required.
Flexibility
There are now two available methods for inbound soft reset; the older method using stored inbound
routing table updates, and the method provided by this feature using dynamic exchange of update
information.
routing table updates, and the method provided by this feature using dynamic exchange of update
information.
Restrictions
Route Refresh Support for BGP Peers
BGP peers must support the route refresh capability to use dynamic inbound soft reset capability. If a peer
does not support the route refresh capability, then the only soft reconfiguration option is to use the neighbor
soft-reconfiguration command, which initiates the storage of inbound routing table updates and requires
additional memory.
does not support the route refresh capability, then the only soft reconfiguration option is to use the neighbor
soft-reconfiguration command, which initiates the storage of inbound routing table updates and requires
additional memory.
Dynamic and Stored Inbound Soft Reset Functions are Mutually Exclusive
The dynamic inbound soft reset and inbound soft reset using stored information functions are mutually
exclusive and cannot be configured together. If the inbound soft reset using stored routing table updates
is configured for a neighbor, the dynamic inbound soft update method cannot be used.
exclusive and cannot be configured together. If the inbound soft reset using stored routing table updates
is configured for a neighbor, the dynamic inbound soft update method cannot be used.
Related Features and Technologies
The BGP Soft Reset feature is an extension of the BGP routing protocol. For more information about
configuring BGP, refer to the “BGP chapter” of the Cisco IOS Release 12.0 Network Protocols
Configuration Guide, Part 1 and Cisco IOS Release 12.0 Network Protocols Command Reference, Part 1.
configuring BGP, refer to the “BGP chapter” of the Cisco IOS Release 12.0 Network Protocols
Configuration Guide, Part 1 and Cisco IOS Release 12.0 Network Protocols Command Reference, Part 1.
Related Documents
•
Cisco IOS Release 12.0 Network Protocols Configuration Guide, Part 1
•
Cisco IOS Release 12.0 Network Protocols Command Reference, Part 1
Supported Platforms
The BGP Soft Reset feature is supported by the following platforms in Cisco IOS Release 12.0(22)S:
•
Cisco 7200 series
•
Cisco 7500 series