Users Guide

NOTE: To configure these settings for a nondefault VRF instance, you must first enter the ROUTER-
CONFIG-VRF sub mode using the following commands:
1. Enter the ROUTER BGP mode using the router bgp as-number command.
2. From the ROUTER BGP mode, enter the ROUTER BGP VRF mode using the vrf vrf-name
command.
Example
OS10(conf-router-bgp-2)# bestpath med confed
Supported
Releases
10.3.0E or later
bestpath router-id
Ignores comparing router-id information for external paths during best-path selection.
Syntax bestpath router-id {ignore}
Parameters ignore — Enter to ignore AS path for best-path computation.
Default Enabled
Command Mode ROUTER-BGP
Usage
Information
If you do not receive the same router ID for multiple paths, select the path that you received first. If
you received the same router ID for multiple paths, ignore the path information. The no version of this
command resets the value to the default.
NOTE: To configure these settings for a nondefault VRF instance, first enter the ROUTER-CONFIG-
VRF sub mode using the following commands:
1. Enter the ROUTER BGP mode using the router bgp as-number command.
2. From the ROUTER BGP mode, enter ROUTER BGP VRF mode using the vrf vrf-name
command.
Example
OS10(conf-router-bgp-2)# bestpath router-id ignore
Supported
Releases
10.3.0E or later
bgp dampening
Enables BGP route-flap dampening and configures the dampening parameters.
Syntax
bgp dampening [half-life | reuse-limit | suppress-limit | max-suppress-time
| route-map-name]
Parameters
● half-life — (Optional) Enter the half-life time, in minutes, after which the penalty decreases.
After the router assigns a penalty of 1024 to a route, the penalty decreases by half after the half-life
period expires, from 1 to 45.
● reuse-limit — (Optional) Enter a reuse-limit value, which compares to the flapping route’s
penalty value. If the penalty value is less than the reuse value, the flapping route advertises again
and is not suppressed, from 1 to 20000.
● suppress-limit — (Optional) Enter a suppress-limit value, which compares to the flapping route’s
penalty value. If the penalty value is greater than the suppress value, the flapping route is no longer
advertised, from 1 to 20000.
● max-suppress-time — (Optional) Enter the maximum number of minutes a route is suppressed,
from 1 to 255.
● route-map-name — (Optional) Enter the name of the route-map.
Defaults half-life 15; reuse-limit 750; suppress-limit 2000; max-suppress-time 60
Layer 3 845