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Configuring BGP4
1 – 20000 minutes. The default is four times the half-life setting. Thus, if you use the default half-life of 15
minutes, the maximum suppression time is 60 minutes.
10. Click the Apply button to apply the changes to the device’s running-config file.
11. Select the Save
link at the bottom of the dialog. Select Yes when prompted to save the configuration change
to the startup-config file on the device’s flash memory.
Using a Route Map To Configure Route Flap Dampening for Specific Routes
Route maps enable you to fine tune route flap dampening parameters for individual routes. To configure route
flap dampening parameters using route maps, configure BGP4 address filters for each route you want to set the
dampening parameters for, then configure route map entries that set the dampening parameters for those routes.
The following sections show examples.
To configure route flap dampening for specific routes, use one of the following methods.
USING THE CLI
To configure address filters and a route map for dampening specific routes, enter commands such as the
following:
HP9300(config)# router bgp
HP9300(config-bgp-router)# address-filter 9 permit 209.157.22.0 255.255.255.0
255.255.255.0 255.255.255.0
HP9300(config-bgp-router)# address-filter 10 permit 209.157.23.0 255.255.255.0
255.255.255.0 255.255.255.0
HP9300(config-bgp-router)# exit
HP9300(config)# route-map DAMPENING_MAP permit 9
HP9300(config-routemap DAMPENING_MAP)# match address-filters 9
HP9300(config-routemap DAMPENING_MAP)# set dampening 10 200 2500 40
HP9300(config-routemap DAMPENING_MAP)# exit
HP9300(config)# route-map DAMPENING_MAP permit 10
HP9300(config-routemap DAMPENING_MAP)# match address-filters 10
HP9300(config-routemap DAMPENING_MAP)# set dampening 20 200 2500 60
HP9300(config-routemap DAMPENING_MAP)# router bgp
HP9300(config-bgp-router)# dampening route-map DAMPENING_MAP
The address-filter commands in this example configure two BGP4 address filters, for networks 209.157.22.0 and
209.157.23.0. The first route-map command creates an entry in a route map called “DAMPENING_MAP”. Within
this entry of the route map, the match command matches based on address filter 9, and the set command sets
the dampening parameters for the route that matches. Thus, for BGP4 routes to 209.157.22.0, the routing switch
uses the route map to set the dampening parameters. These parameters override the globally configured
dampening parameters.
The commands for the second entry in the route map (instance 10 in this example) perform the same functions for
route 209.157.23.0. Notice that the dampening parameters are different for each route.
USING THE WEB MANAGEMENT INTERFACE
1. Log on to the device using a valid user name and password for read-write access. The System configuration
panel is displayed.
2. Click on the plus sign next to Configure in the tree view to expand the list of configuration options.
3. Click on the plus sign next to BGP in the tree view to expand the list of BGP option links.
4. Click on the Address Filter
link to display the BGP Address Filter panel.
• If the device does not have any BGP address filters configured, the BGP Address Filter configuration
panel is displayed, as shown in the following example.
• If BGP address filters are already configured and you are adding a new one, click on the Add Address
Filter link to display the BGP Address Filter configuration panel, as shown in the following example.
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