Dell N3200-ON Networking N-Series Switches CLI Reference Guide version 6.8.0 - Page 1382

Default Configuration When no update source is configured, the BGP TCP connections use the primary IPv4 address on the outgoing interface to the neighbor. Command Mode BGP Router Configuration mode, BGP Router VRF Configuration mode, IPv4 Address Family Configuration mode User Guidelines The IP address used as the source address in IP packets sent to a neighbor must be the same address used to configure the local system as a neighbor on the peer BGP router. In other words, if the update source is configured, it must be the same IP address used in the neighbor remote-as command on the peer. It is common to use an IP address on a loopback interface as an update source because a loopback interface is always reachable as long as any routing interface is up. The peering session will stay up as long as the loopback interface remains reachable. If you use an IP address on a routing interface, then the peering session will go down if that interface goes down. Command History Introduced in version 6.2.0.1 firmware. Updated in version 6.3.0.1 firmware. Command mode updated in version 6.8 firmware. Example console(config-router)#neighbor 10.130.14.55 update-source 100 network (BGP Router Configuration) The network command configures BGP to advertise an address prefix.The prefix is only advertised if the common routing table includes a non-BGP route with the same prefix. The route may be a connected route, a static route, or a dynamic route from another routing protocol. Syntax network prefix mask network-mask [route-map rm-name] Layer 3 Routing Commands 1382