Setup Guide

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-family-ipv6-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.
NOTE:
This behavior applies to all BGP neighbors. Meaning, BGP neighbors that were explicitly disabled before global
shutdown also remain in disabled state. Enable these neighbors individually using the no shutdown command.
Route Map Continue
The BGP route map continue feature, continue [sequence-number], (in ROUTE-MAP mode) allows movement from one
route-map entry to a specific route-map entry (the sequence number).
If you do not specify a sequence number, the continue feature moves to the next sequence number (also known as an “implied
continue”). If a match clause exists, the continue feature executes only after a successful match occurs. If there are no
successful matches, continue is ignored.
Match a Clause with a Continue Clause
The continue feature can exist without a match clause.
Without a match clause, the continue clause executes and jumps to the specified route-map entry. With a match clause and
a continue clause, the match clause executes first and the continue clause next in a specified route map entry. The continue
clause launches only after a successful match. The behavior is:
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Border Gateway Protocol (BGP)