Juniper JUNOSE 11.2.X BGP AND MPLS, Configuration Manual

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A route matches this community list only if it belongs to at least all three communities
in extended community list boston1: Communities 100:2, 100:3, and 100:4.
•
Use the no version to remove a single extended community list entry if permit or deny
and a path-expression are specified. Otherwise, the entire community list is removed.
•
See ip extcommunity-list.
Resetting a BGP Connection
When a routing policy changes, use the clear ip bgp and clear bgp ipv6 commands to
clear the current BGP session and implement the new policy.
Clearing a BGP session can create a major disruption in the network operation; this is
known as a hard clear. For this reason, you can use the
soft in and soft out options of
the command (a soft clear) to activate policies without disrupting the BGP session.
The soft in option reapplies inbound policy to received routes; the soft out option resends
routes to a neighbor after reapplying outbound policy. The soft in prefix-list option
causes BGP to push any prefix list outbound route filters (ORFs) to the peer and then
reapply inbound policy to received routes.
NOTE: Resetting the BGP connection is slightly different when you change outbound
policies for peer groups for which you have enabled Adj-RIBs-Out. 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. 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.
clear bgp ipv6
clear ip bgp
•
Use to clear the current BGP connection or to activate a new policy without clearing
the BGP session.
•
You can specify the IP address of a BGP neighbor, the name of a BGP peer group, or
an address family to be cleared.
•
Use the asterisk (*) to clear all BGP connections.
•
If you do not use the soft in or soft out options, the clear is known as a hard clear and
clears the current BGP connection.
•
Use the soft in option to reapply inbound policy to all received routes without clearing
the BGP session.
•
Use the soft in prefix-filter option to push an ORF to the peer and reapply inbound
policy to all received routes without clearing the BGP session.
•
Use the soft out option to reapply outbound policy and resend routes without clearing
the BGP session.
Copyright © 2010, Juniper Networks, Inc. 96
JunosE 11.2.x BGP and MPLS Configuration Guide