Configuring BGP4
December 2005 © Foundry Networks, Inc. 21 - 101
inbound
This command enables soft reconfiguration for updates received from 10.10.200.102. The software dynamically
refreshes or resets the session with the neighbor, then retains all route updates from the neighbor following the
reset.
Syntax: [no] neighbor <ip-addr> | <peer-group-name> soft-reconfiguration inbound
NOTE: The syntax related to soft reconfiguration is shown. For complete command syntax, see “Adding BGP4
Neighbors” on page 21-12.
Placing a Policy Change into Effect
To place policy changes into effect, enter a command such as the following:
FESX424 Router(config-bgp-router)# clear ip bgp neighbor 10.10.200.102 soft in
This command updates the routes by comparing the route policies against the route updates that the Layer 3
Switch has stored. The command does not request additional updates from the neighbor or otherwise affect the
session with the neighbor.
Syntax: clear ip bgp neighbor <ip-addr> | <peer-group-name> soft in
NOTE: If you do not specify “in”, the command applies to both inbound and outbound updates.
NOTE: The syntax related to soft reconfiguration is shown. For complete command syntax, see “Dynamically
Refreshing Routes” on page 21-103.
Displaying the Filtered Routes Received from the Neighbor or Peer Group
When you enable soft reconfiguration, the Layer 3 Switch saves all updates received from the specified neighbor
or peer group. This includes updates that contain routes that are filtered out by the BGP4 route policies in effect
on the Layer 3 Switch. To display the routes that have been filtered out, enter the following command at any level
of the CLI:
The routes displayed by the command are the routes that the Layer 3 Switch’s BGP4 policies filtered out. The
Layer 3 Switch did not place the routes in the BGP4 route table, but did keep the updates. If a policy change
causes these routes to be permitted, the Layer 3 Switch does not need to request the route information from the
neighbor, but instead uses the information in the updates.
Syntax: show ip bgp filtered-routes [<ip-addr>] | [as-path-access-list <num>] | [detail] | [prefix-list <string>]
The <ip-addr> parameter specifies the IP address of the destination network.
The as-path-access-list <num> parameter specifies an AS-path ACL. Only the routes permitted by the AS-path
ACL are displayed.
FESX424 Router# show ip bgp filtered-routes
Searching for matching routes, use ^C to quit...
Status A:AGGREGATE B:BEST b:NOT-INSTALLED-BEST C:CONFED_EBGP D:DAMPED
E:EBGP H:HISTORY I:IBGP L:LOCAL M:MULTIPATH S:SUPPRESSED F:FILTERED
Prefix Next Hop Metric LocPrf Weight Status
1 3.0.0.0/8 192.168.4.106 100 0 EF
AS_PATH: 65001 4355 701 80
2 4.0.0.0/8 192.168.4.106 100 0 EF
AS_PATH: 65001 4355 1
3 4.60.212.0/22 192.168.4.106 100 0 EF
AS_PATH: 65001 4355 701 1 189
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