Extreme Networks ExtremeWare XOS Command Reference Manual page 1787

ExtremeWare XOS 11.5 supports only the Summit X450 family of switches and the BlackDiamond 8800 series switch.
PIM Mode Interoperation
PIM-SSM has the following requirement:
Any host that participates in PIM-SSM must use IGMPv3
●
PIM-SSM is designed as a subset of PIM-SM and all messages are compliant with PIM-SM. PIM-SSM
and PIM-SM can coexist in a PIM network; only the last hop router need to be configured for PIM-SSM
if both source and receivers are present all the time. However, to avoid any JOIN delay, it is
recommended that you enable all routers along the (s,g) path for PIM-SSM.
PIM Mode Interoperation
An Extreme Networks switch can function as a PIM multicast border router (PMBR). A PMBR
integrates PIM-SM and PIM-DM traffic.
When forwarding PIM-DM traffic into a PIM-SM network, the PMBR notifies the RP that the PIM-DM
network exists. The PMBR forwards PIM-DM multicast packets to the RP, which in turn forwards the
packets to those routers that have joined the multicast group in the PIM-SM domain.
The PMBR also forwards PIM-SM traffic to a PIM-DM network. The PMBR sends a join message to the
RP and the PMBR floods traffic from the RP into the PIM-DM network.
No commands are needed to enable PMBR mode interoperation. PMBR mode translation is
automatically enabled when a dense mode interface and a sparse mode interface are enabled on the
same switch.
Multicast VLAN Registration
Multicast VLAN Registration (MVR) is designed to support distributing multicast streams for IPTV to
subscribers over a layer 2 network. In a standard layer 2 network, a multicast stream received on a
VLAN is not forwarded to another VLAN. The streams are confined to the layer 2 broadcast domain. In
an IGMP snooping environment, streams are forwarded only to interested hosts on a VLAN. For inter-
VLAN forwarding (routing) a multicast routing protocol, such as PIM/DVMRP must be deployed.
MVR breaks this basic rule, so that a stream received over layer 2 VLANs is forwarded to another
VLAN, eliminating the need for a layer 3 routing protocol. It simplifies the multicast stream distribution
and is a better solution for IPTV-like services. With MVR, a multicast stream is forwarded to all VLANs
containing interested hosts.
1787
ExtremeWare XOS 11.5 Command Reference Guide