3Com Switch 8800 Advanced Software V5 Configuration Guide

440 CHAPTER 35: BGP CONFIGURATION
Configuring BGP Route
Dampening
Through configuring BGP route dampening, you can suppress unstable routes to
neither add them to the local routing table nor advertise them to BGP peers.
To configure BGP route dampening, use the following commands:
Configuring BGP
Routing Attributes
Prerequisites Before configuring this task, you have configured BGP basic functions.
Configuration Procedure You can use BGP route attributes to adjust BGP route selection policy.
To configure BGP route attributes, use the following commands:
To do... Use the command... Remarks
Enter system view system-view -
Enter BGP view bgp as-number -
Configure BGP route
dampening
dampening [
half-life-reachable
half-life-unreachable
reuse suppress ceiling |
route-policy
route-policy-name ] *
Optional
Not configured by default
To do... Use the command... Remarks
Enter system view system-view -
Enter BGP view bgp as-number -
Configure preferences for external,
internal, local routes
preference {
external-preference
internal-preference
local-preference |
route-policy
route-policy-name }
Optional
The default preferences of
external, internal and local
routes are 255, 255, 130
respectively.
Configure the default value of local
preference
default
local-preference
value
Optional
The value defaults to 100
Configur
e the
MED
attribute
Configure the default MED
value
default med
med-value
Optional
The value defaults to 0
Enable to compare MED values
of routes from different ASs
compare-different-a
s-med
Optional
Not enabled by default
Enable to compare MED values
of routes from each AS
bestroute
compare-med
Optional
Not enabled by default
Enable to compare MED values
of routes from confederation
peers
bestroute
med-confederation
Optional
Not enabled by default