Dell PowerSwitch S4820T Configuration Guide for the S4820T System 9.112.0P1 - Page 212

2 In ROUTER BGP mode, enter the following command: ROUTER BGP Mode shutdown all You can use the no shutdown all command in the ROUTER BGP mode to re-enable all the BGP interface. You can also enable or disable BGP neighbors corresponding to the IPv4 unicast or multicast groups and the IPv6 unicast groups. To enable or disable BGP neighbors corresponding to the IPv4 unicast groups: 1 Enter the router bgp mode using the following command: CONFIGURATION Mode router bgp as-number 2 Shut down the BGP neighbors corresponding to the IPv4 unicast groups using the following command: shutdown address-family-ipv4-unicast To enable or disable BGP neighbors corresponding to IPv4 multicast groups: 1 Enter the router bgp mode using the following command: CONFIGURATION Mode router bgp as-number 2 Shut down the BGP neighbors corresponding to IPv4 multicast groups using the following command: ROUTER-BGP Mode shutdown address-family-ipv4-multicast To enable or disable BGP neighbors corresponding to the IPv6 unicast groups: 1 Enter the router bgp mode using the following command: CONFIGURATION Mode router bgp as-number 2 Shut down the BGP neighbors corresponding to the IPv6 unicast groups using the following command: ROUTER-BGP Mode shutdown address-family-ipv6-unicast When you configure BGP, you must explicitly enable the BGP neighbors using the following commands: neighbor {ip-address | peer-group name} remote-as as-number neighbor {ip-address | peer-group-name} no shutdown For more information on enabling BGP, see Enabling BGP. When you use the shutdown all command in global configuration mode, this command takes precedence over the shutdown address-family-ipv4-unicast, shutdown address-family-ipv4-multicast, and shutdown address-familyipv6-unicast commands. Irrespective of whether the BGP neighbors are disabled earlier, the shutdown all command brings down all the configured BGP neighbors. When you issue the no shutdown all command, all the BGP neighbor neighbors are enabled. However, when you re-enable all the BGP neighbors in global configuration mode, only the neighbors that were not in disabled state before the global shutdown come up. Meaning, BGP neighbors corresponding to the IPv4 unicast or multicast groups and the IPv6 unicast groups that were explicitly disabled before the global shutdown remains in disabled state. Use the no shutdown address-family-ipv4-unicast, no shutdown address-family-ipv4-multicast, or no shutdown address-family-ipv6-unicast commands to enable these neighbors. 212 Border Gateway Protocol IPv4 (BGPv4)