H3C S9500 Series Operation Manual page 321

Operation Manual – Routing Protocol
H3C S9500 Series Routing Switches
is the basis to evaluate the future stability. When the route flapping occurs, penalty will
be given, and when the penalty reaches a specific threshold, the route will be
suppressed. With time going, the penalty value will decrease according to power
function, and when it decreases to certain specific threshold, the route suppression will
be eliminated and the route will be re-advertised.
Perform the following configuration in BGP view.
Table 6-30 Configure BGP route dampening
Configure BGP route dampening
Cancel BGP route dampening
By default, route dampening is disabled.
II. Clear route dampening information
Perform the following configuration in user view to clear route dampening information.
Table 6-31 Clear route dampening information
Clear route dampening information
After you use the reset bgp dampening command, the command will release the
suppression of suppressed routes.
6.2.10 Configuring BGP Preference
Three types of routes may be involved in BGP: routes learned from external peers
(EBGP), routes learned from internal peers (IBGP) and local-originated routes. You can
set preference values for the three types of route.
Perform the following configuration in BGP view.
Table 6-32 Configure BGP preference
Configure BGP preference
Restore the default preference
Operation
Operation
Operation
dampening
half-life-unreachable
ceiling ] [ route-policy route-policy-name ]
undo dampening
reset bgp dampening [ network-address
[ mask ] ]
Command
preference ebgp-value ibgp-value local-value
undo preference
6-19
Chapter 6 BGP Configuration
Command
[ half-life-reachable
reuse suppress
Command