Reset Neighbors Using Bgp Hard Reset - Cisco NCS 5500 Series Configuration Manual

Implementing BGP
DETAILED STEPS
Command or Action
Step 1
show bgp neighbors
Example:
RP/0/RP0/CPU0:router# show bgp
neighbors
Step 2
Example:
RP/0/RP0/CPU0:router# clear bgp ipv4
unicast 10.0.0.2 soft out

Reset Neighbors Using BGP Hard Reset

Perform this task to reset neighbors using a hard reset. A hard reset removes the TCP connection to the
neighbor, removes all routes received from the neighbor from the BGP table, and then re-establishes the
session with the neighbor. If the graceful keyword is specified, the routes from the neighbor are not removed
from the BGP table immediately, but are marked as stale. After the session is re-established, any stale route
that has not been received again from the neighbor is removed.
SUMMARY STEPS
1. clear bgp { ipv4 { unicast | labeled-unicast | all | tunnel tunnel | mdt } | ipv6 unicast | all
| labeled-unicast } | all { unicast | multicast | all | labeled-unicast | mdt | tunnel } | vpnv4
unicast | vrf { vrf-name | all } { ipv4 unicast | labeled-unicast } | ipv6 unicast } | vpnv6 unicast
} { * | ip-address | as as-number | external } [ graceful ] soft [ in [ prefix-filter ] | out ] clear
bgp { ipv4 | ipv6} { unicast | labeled-unicast }
DETAILED STEPS
clear bgp { ipv4 { unicast | labeled-unicast | all | tunnel tunnel | mdt } | ipv6 unicast | all | labeled-unicast
} | all { unicast | multicast | all | labeled-unicast | mdt | tunnel } | vpnv4 unicast | vrf { vrf-name | all }
{ ipv4 unicast | labeled-unicast } | ipv6 unicast } | vpnv6 unicast } { * | ip-address | as as-number | external
} [ graceful ] soft [ in [ prefix-filter ] | out ] clear bgp { ipv4 | ipv6} { unicast | labeled-unicast }
Example:
RP/0/RP0/CPU0:router# clear bgp ipv4 unicast 10.0.0.3
Purpose
Verifies that received route refresh capability from the neighbor is enabled.
Soft resets a BGP neighbor.
• The * keyword resets all BGP neighbors.
• The ip-address argument specifies the address of the neighbor to
be reset.
• The as-number argument specifies that all neighbors that match the
autonomous system number be reset.
• The external keyword specifies that all external neighbors are reset.
BGP Configuration Guide for Cisco NCS 5500 Series Routers, IOS XR Release 6.2.x
Configure BGP Neighbor Group and Neighbors
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