snoop-pseudowires
Syntax
snoop-pseudowires;
Hierarchy Level
[edit routing-instances routing-instance-name igmp-snooping-options] [edit logical-systems logical-system -name routing-instances routing-instance-nameigmp-snooping-options]
Description
The default IGMP snooping implementation for a
VPLS instance adds each pseudowire interface to its oif list. It includes traffic from the ingress PE that is sent to egress
PE even if there is no interest. The snoop-pseudowires option
prevents multicast traffic from traversing the pseudowire (to egress
PEs) unless there are IGMP receivers for the traffic. In other words,
multicast traffic is forwarded only to VPLS core interfaces that are
router interfaces, or that are IGMP receivers. In addition to the
benefit of sending traffic to only interested PEs, snoop-pseudowires also optimizes a common path between PE-P routers wherever possible
(so if two PEs connect via the same P router, only one copy of packet
is sent; the packet would be replicated only on P routers for which
the path is divergent).
Note that this option can only be enabled when instance-type is vpls. The snoop-pseudowires option
cannot be enabled if use-p2mp-lsp is enabled for igmp-snooping-options.
Required Privilege Level
routing—To view this statement in the configuration.
routing-control—To add this statement to the configuration.
Release Information
Statement introduced in Junos OS Release 15.1.