Dell Force10 S4820T S4820T Configuration Guide - Page 207

Step Command Syntax Command Mode Purpose To add an external BGP (EBGP) neighbor, configure the as-number parameter with a number different from the BGP as-number configured in the router bgp as-number command. To add an internal BGP (IBGP neighbor, configure the as-number parameter with the same BGP as-number configured in the router bgp as-number command. After you create a peer group, you can use any of the commands beginning with the keyword neighbor to configure that peer group. When you add a peer to a peer group, it inherits all the peer group's configured parameters. A neighbor cannot become part of a peer group if it has any of the following commands are configured: • neighbor advertisement-interval • neighbor distribute-list out • neighbor filter-list out • neighbor next-hop-self • neighbor route-map out • neighbor route-reflector-client • neighbor send-community A neighbor may keep its configuration after it was added to a peer group if the neighbor's configuration is more specific than the peer group's, and the neighbor's configuration does not affect outgoing updates. Note: When you configure a new set of BGP policies for a peer group, always reset the peer group by entering the clear ip bgp peer-group peer-group-name command in EXEC Privilege mode. Use the show config command in the CONFIGURATION ROUTER BGP mode to view the configuration. When you create a peer group, it is disabled (shutdown). The following example shows the creation of a peer group (zanzibar). FTOS(conf-router_bgp)#neighbor zanzibar peer-group FTOS(conf-router_bgp)#show conf ! router bgp 45 bgp fast-external-fallover bgp log-neighbor-changes neighbor zanzibar peer-group neighbor zanzibar shutdown neighbor 10.1.1.1 remote-as 65535 neighbor 10.1.1.1 shutdown neighbor 10.14.8.60 remote-as 18505 neighbor 10.14.8.60 no shutdown FTOS(conf-router_bgp)# Border Gateway Protocol IPv4 (BGPv4) | 207