Dell PowerConnect FCS624S Configuration Guide - Page 1136

30 Updating route information and resetting a neighbor session 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. To use the dynamic refresh feature, use either of the following methods. Dynamically refreshing routes The following sections describe how to dynamically refresh BGP4 routes to place new or changed filters into effect. To request a dynamic refresh of all routes from a neighbor, enter a command such as the following. PowerConnect(config-bgp-router)#clear ip bgp neighbor 192.168.1.170 soft in This command asks the neighbor to send its BGP4 table (Adj-RIB-Out) again. The Layer 3 Switch applies its filters to the incoming routes and adds, modifies, or removes BGP4 routes as necessary. Syntax: clear ip bgp neighbor all | | | [soft-outbound | soft [in | out]] The all | | | option specifies the neighbor. The parameter specifies a neighbor by its IP interface with the Layer 3 Switch. The specifies all neighbors in a specific peer group. The parameter specifies all neighbors within the specified AS. The all parameter specifies all neighbors. The soft-outbound parameter updates all outbound routes by applying the new or changed filters, but sends only the existing routes affected by the new or changed filters to the neighbor. The soft [in | out] parameter specifies whether you want to refresh the routes received from the neighbor or sent to the neighbor: • soft in does one of the following: - If you enabled soft reconfiguration for the neighbor or peer group, soft in updates the routes by comparing the route policies against the route updates that the Layer 3 Switch has stored. Soft reconfiguration does not request additional updates from the neighbor or otherwise affect the session with the neighbor. Refer to "Using soft reconfiguration" on page 1091. - If you did not enable soft reconfiguration, soft in requests the neighbor entire BGP4 route table (Adj-RIB-Out), then applies the filters to add, change, or exclude routes. - If a neighbor does not support dynamic refresh, soft in resets the neighbor session. • soft out updates all outbound routes, then sends the Layer 3 Switch entire BGP4 route table (Adj-RIB-Out) to the neighbor, after changing or excluding the routes affected by the filters. If you do not specify in or out, the Layer 3 Switch performs both options. NOTE The soft-outbound parameter updates all outbound routes by applying the new or changed filters, but sends only the existing routes affected by the new or changed filters to the neighbor. The soft out parameter updates all outbound routes, then sends the Layer 3 Switch entire BGP4 route table (Adj-RIB-Out) to the neighbor, after changing or excluding the routes affected by the filters. Use soft-outbound if only the outbound policy is changed. 1094 PowerConnect B-Series FCX Configuration Guide 53-1002266-01