BGP Route Filters

To review BGP Route statistics:

1. Select the Statistics menu from the Web UI.
2. Expand the RF Domain node.
3. Select a Wireless Controller.
4. Select BGP from the left-hand side of the UI.

   The BGP Summary screen displays by default in the right-hand pane.

5. Select the Route Filters tab.
6. In the Select Filter(s) area, use the Select Filter Type drop-down menu to specify a filter. Route statistics can be filtered on the basis of the following eight (8) different parameters:
   • BGP Stats Details – Routes are filtered on BGP statistics details.
   • Community List – Routes are filtered on the community lists included in each route.
   • Community – Routes are filtered on the community information included in each route.
   • Expanded Community List – Routes are filtered on the expanded community information included in each route.
   • Prefix List – Routes are filtered on the prefix list included in each route.
   • Filter List – Routes are filtered on the filter list included in each route.
   • Regular Expression – Routes are filtered based on regular expressions.
   • Route Map – Routes are filtered on the route map information included in each route.
7. Select the BGP Stats Detail from the Select Filter Type list.
8. Use the Type Specific Network field to filter statistics based on the provided IP or Network information. Select Show Details to display the list of filtered routes.

   Route Status Displays the status of this route. Route status options include: Suppressed – This route has been suppressed. Damped – This route has been damped due to flapping. History - This route is kept in memory to retain flap-dampening statistics. This route is not currently announced by the peer. Valid – This route is a valid route. Best – This route is the best route of all routes. RIB Failure – A route with better administrative distance is already present, a memory failure exists or the number of routes in VRF (VPN routing/forwarding) exceeds the route-limit configured under the VRF instance. Removed – This route has been removed from the routes list. Network Displays network information for this route. Next Hop Displays the IP address of the next hop resource utilized in this route. Local Pref Lists the IP address of this controller or service platform‘s preferred next hop for this route. The local preference indicates the preferred path when there are multiple paths to the same destination. The path having the highest preference value is preferred. The preference value is sent to all routers and access servers in the local AS. Weight Displays the weight assigned to this route. Weight is used to decide the preferred route when the same route is learned from multiple neighbors. The route with the highest weight is always chosen. Metric Lists a measure (metric) of the quality of the path. A lower value indicates a better path. This value is the MED (Multi Exit Discriminator) evaluated by BGP during the best path selection process. Path Displays path information for this route. Origin Displays the IP address of the origin for this route.

9. Select Community List from the Select Filter Type list.
10. Use the Type Community List field to filter the statistics based on the community type of the route. Select Show Details to display the list of filtered routes.
    

    Note

    The following table is common to these filter types:

    • Community List
    • Community
    • Prefix List
    • Filter List
    • Regular Expression
    • Route Map

    Route Status Displays the status of this route. Route status options include: Suppressed – This route has been suppressed. Damped – This route has been damped due to flapping. History - This route is kept in memory to retain flap-dampening statistics. This route is not currently announced by the peer. Valid – This route is a valid route. Best – This route is the best route of all routes. RIB Failure – A route with better administrative distance is already present, a memory failure exists or the number of routes in VRF exceeds the route-limit configured under the VRF instance. Removed – This route has been removed from the routes list. Network Displays network information for this route. Next Hop Displays the IP address of the next hop resource utilized in this route. Local Pref Lists the IP address of this controller or service platform‘s preferred next hop for this route. The local preference indicates the preferred path when there are multiple paths to the same destination. The path having the highest preference value is preferred. The preference value is sent to all routers and access servers in the local AS. Weight Displays the weight assigned to this route. Weight is used to decide the preferred route when the same route is learned from multiple neighbors. The route with the highest weight is always chosen. Metric Lists a measure (metric) of the quality of the path. A lower value indicates a better path. This value is the MED evaluated by BGP during the best path selection process. AS-Path Displays AS path information for this route. Origin Displays the IP address of the origin for this route.

11. Select Community from the Select Filter Type list.
12. Use the Type Community drop-down menu to filter the statistics based on the community of the route. Routes can be filtered on:
    • local-AS - Displays routes that prevent the transmission of packets outside the local AS.
    • no-advertise - Displays routes not advertised to any peer, either internal or external.
    • no-export - Displays routes not advertised to BGP peers, keeping this route within an AS.
    • aa:nn - Filters routes based on the AS Number specified. The first part (aa) represents the AS number. The second part (nn) represents a 2-byte number. Routes matching this number are filtered.
13. Select Show Details to display the list of filtered routes.
14. Select Prefix List from the Select Filter Type list.
15. Use the Type Prefix list field to filter the statistics based on the prefix of the route. Select Show Details to display the list of filtered routes.
16. Select Filter List from the Select Filter Type list.
17. Use the Type Filter List field to filter the statistics based on the filter list of the route. Select Show Details to display the list of filtered routes.
18. Select Regular Expression from the Select Filter Type list.
19. Use the Type Regular Expression field to filter the routes based on regular expressions. Select Show Details to display the list of filtered routes.
20. Select Route Map from the Select Filter Type list.
21. Use the Type Route Map field to filter the routes based on route maps (enhanced packet filters). Select Show Details to display the list of filtered routes.
22. Select Expanded Community List from the Select Filter Type list.
23. Use the Type Expanded list to filter routes based on route-maps. Select Show Details to display a list of filtered routes.
24. Periodically, select Refresh to update the screen‘s counters to their latest value.