Administrator Guide

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:
● A successful match with a continue clause—the route map executes the set clauses and then goes to the specified route
map entry after execution of the continue clause.
● If the next route map entry contains a continue clause, the route map executes the continue clause if a successful match
occurs.
● If the next route map entry does not contain a continue clause, the route map evaluates normally. If a match does not occur,
the route map does not continue and falls-through to the next sequence number, if one exists
Set a Clause with a Continue Clause
If the route-map entry contains sets with the continue clause, the set actions operation is performed first followed by the
continue clause jump to the specified route map entry.
● If a set actions operation occurs in the first route map entry and then the same set action occurs with a different value in a
subsequent route map entry, the last set of actions overrides the previous set of actions with the same set command.
● If the set community additive and set as-path prepend commands are configured, the communities and AS
numbers are prepended.
Enabling MBGP Configurations
Multiprotocol BGP (MBGP) is an enhanced BGP that carries IP multicast routes. BGP carries two sets of routes: one set for
unicast routing and one set for multicast routing. The routes associated with multicast routing are used by the protocol
independent multicast (PIM) to build data distribution trees.
MBGP for IPv4 multicast is supported on the switch.
In the Dell Networking OS, MBGP is implemented per RFC 1858. You can enable the MBGP feature per router and/or per peer/
peer-group.
The default is IPv4 Unicast routes.
When you configure a peer to support IPv4 multicast, the system takes the following actions:
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Border Gateway Protocol IPv4 (BGPv4)