Dell BigIron RX Series, Руководство по настройке

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816 BigIron RX Series Configuration Guide
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Clearing route flap dampening statistics
NOTE
Clearing the dampening statistics for a route does not change the dampening status of the route.
To clear all the route dampening statistics, enter the following command at any level of the CLI.
BigIron RX# clear ip bgp flap-statistics
Syntax: clear ip bgp flap-statistics [regular-expression <regular-expression> | <address> <mask>
| neighbor <ip-addr> ]
The parameters are the same as those for the show ip bgp flap-statistics command (except the
longer-prefixes option is not supported). Refer to
“Configuring route flap dampening” on page 765.
NOTE
The clear ip bgp damping command not only clears statistics but also un-suppresses the routes.
Refer to
“Configuring route flap dampening” on page 765.
Generating traps for BGP
BigIron RX provides the ability to enable and disable SNMP traps for BGP. BGP traps are enabled by
default.
To enable BGP traps after they have been disabled, enter the following command.
BigIron RX(config)# snmp-server enable traps bgp
Syntax: [no] snmp-server enable traps bgp
Use the no form of the command to disable BGP traps.
Updating route information and resetting a neighbor
session
The following sections describe ways to update route information with a neighbor, reset the session
with a neighbor, and close a session with a neighbor.
Any change to a policy (ACL, route map, and so on) is automatically applied to outbound routes that
are learned from a BGP4 neighbor or peer group after the policy change occurs. However, for
existing outbound routes, you must reset the neighbor to update the outbound routes.
Similar to inbound routes, any change to a policy is automatically applied to inbound routes that are
learned after the policy change occurs. However, to apply the changes to existing inbound routes
(those inbound routes that were learned before the policy change), you must reset the neighbors to
update the routes using one of the following methods:
•
Request the complete BGP4 route table from the neighbor or peer group. You can use this
method if the neighbor supports the refresh capability (RFCs 2842 and 2858). Most routers
today support this capability.
•
Clear (reset) the session with the neighbor or peer group. This is the only method you can use
if the soft reconfiguration is enabled for the neighbor.
You also can clear and reset the BGP4 routes that have been installed in the IP route table. Refer to
“Clearing and resetting BGP4 routes in the IP route table” on page 822.