Dell PowerConnect B-RX BigIron RX Series Configuration Guide v02.7.02 - Page 889

26 Filtering Displaying all the routes received from the neighbor To display all the route information received in route updates from a neighbor since you enabled soft reconfiguration, enter a command such as the following at any level of the CLI. BigIron RX# show ip bgp neighbor 192.168.4.106 routes There are 97345 received routes from neighbor 192.168.4.106 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 BE AS_PATH: 65001 4355 701 80 2 4.0.0.0/8 192.168.4.106 100 0 BE AS_PATH: 65001 4355 1 3 4.60.212.0/22 192.168.4.106 100 0 BE AS_PATH: 65001 4355 701 1 189 4 6.0.0.0/8 192.168.4.106 100 0 BE Syntax: show ip bgp neighbors received-routes [detail] The detail parameter displays detailed information for the routes. The example above shows summary information. NOTE The syntax for displaying received routes is shown. For complete command syntax, refer to "Displaying BGP4 neighbor information" on page 827. Dynamically requesting a route refresh from a BGP4 neighbor You can easily apply changes to filters that control BGP4 routes received from or advertised to a neighbor, without resetting the BGP4 session between the device and the neighbor. For example, if you add, change, or remove a BGP4 IP prefix list that denies specific routes received from a neighbor, you can apply the filter change by requesting a route refresh from the neighbor. If the neighbor also supports dynamic route refreshes, the neighbor resends its Adj-RIB-Out, its table of BGP4 routes. Using the route refresh feature, you do not need to reset the session with the neighbor. The route refresh feature is based on the following specifications: • RFC 2842. This RFC specifies the Capability Advertisement, which a BGP4 router uses to dynamically negotiate a capability with a neighbor. • RFC 2858 for Multi-protocol Extension. • RFC 2918, which describes the dynamic route refresh capability The dynamic route refresh capability is enabled by default and cannot be disabled. When the device sends a BGP4 OPEN message to a neighbor, the device includes a Capability Advertisement to inform the neighbor that the device supports dynamic route refresh. NOTE The option for dynamically refreshing routes received from a neighbor requires the neighbor to support dynamic route refresh. If the neighbor does not support this feature, the option does not take effect and the software displays an error message. The option for dynamically re-advertising routes to a neighbor does not require the neighbor to support dynamic route refresh. BigIron RX Series Configuration Guide 817 53-1001810-01