Configuring Route Flap Dampening - Juniper JUNOSE 11.2.X BGP AND MPLS Configuration Manual

neighbor maximum-orf-entries
neighbor prefix-list

Configuring Route Flap Dampening

Copyright © 2010, Juniper Networks, Inc.
Example
host1(config-router)#neighbor 192.168.1.158 capability orf prefix-list both
Use the no version to prevent advertisement of the capability. Use the default version
to restore the default, advertising the capability.
See neighbor capability.
Use to set the maximum number of ORF entries of any one type that will be accepted
from the specified neighbor.
Example
host1(config-router)#neighbor 192.168.1.158 maximum-orf-entries 125000
Use the no version to restore the default value of no limits.
See neighbor maximum-orf-entries.
Use to assign an inbound or outbound prefix list.
If you specify a BGP peer group by using the peerGroupName argument, all the members
of the peer group inherit the characteristic configured with this command unless it is
overridden for a specific peer. However, you cannot configure a member of a peer group
to override the inherited peer group characteristic for outbound policy.
Example
host1(config-router)#neighbor 192.168.1.158 prefix-list seoul19 in
New policy values are applied to all routes that are sent (outbound policy) or received
(inbound policy) after you issue the command.
To apply the new policy to routes that are already present in the BGP routing table,
you must use the clear ip bgp command to perform a soft clear or hard clear of the
current BGP session.
Behavior is different for outbound policies configured for peer groups for which you
have enabled Adj-RIBs-Out. If you change the outbound policy for such a peer group
and want to fill the Adj-RIBs-Out table for that peer group with the results of the new
policy, you must use the clear ip bgp peer-group command to perform a hard clear or
outbound soft clear of the peer group. You cannot merely perform a hard clear or
outbound soft clear for individual peer group members because that causes BGP to
resend only the contents of the Adj-RIBs-Out table.
Use the no version to remove the prefix list.
See neighbor prefix-list.
Route flap dampening is a mechanism for minimizing instability caused by route flapping.
Route flapping occurs when a link is having a problem and is constantly going up and
Chapter 1: Configuring BGP Routing
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