Dell PowerSwitch S4820T Configuration Guide for the S4820T System 9.112.1P1 - Page 189
Border Gateway Protocol IPv4 BGPv4, command in CONFIGURATION ROUTER BGP mode.
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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 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 if 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. To view the configuration, use the show config command in CONFIGURATION ROUTER BGP mode. When you create a peer group, it is disabled (shutdown). The following example shows the creation of a peer group (zanzibar) (in bold). Dell(conf-router_bgp)#neighbor zanzibar peer-group Dell(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 Dell(conf-router_bgp)# To enable a peer group, use the neighbor peer-group-name no shutdown command in CONFIGURATION ROUTER BGP mode (shown in bold). Dell(conf-router_bgp)#neighbor zanzibar no shutdown Dell(conf-router_bgp)#show config ! router bgp 45 bgp fast-external-fallover bgp log-neighbor-changes neighbor zanzibar peer-group neighbor zanzibar no 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 Dell(conf-router_bgp)# To disable a peer group, use the neighbor peer-group-name shutdown command in CONFIGURATION ROUTER BGP mode. The configuration of the peer group is maintained, but it is not applied to the peer group members. When you disable a peer group, all the peers within the peer group that are in the ESTABLISHED state move to the IDLE state. To view the status of peer groups, use the show ip bgp peer-group command in EXEC Privilege mode, as shown in the following example. Dell>show ip bgp peer-group Peer-group zanzibar, remote AS 65535 Border Gateway Protocol IPv4 (BGPv4) 189
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