Igmp Support For Vpns - HP FlexNetwork 7500 Series Configuration Manual

Figure 31 IGMP SSM mapping
As shown in
IGMPv3, respectively. To provide the SSM service for Host A and Host B, you must configure the
IGMP SSM mapping feature on Router A.
After IGMP SSM mappings are configured, Router A checks the multicast group address G in the
received IGMPv1 or IGMPv2 report, and performs the following operations:
•
If G is not in the SSM group range, Router A provides the ASM service.
•
If G is in the SSM group range but does not match any IGMP SSM mappings, Router A drops
the message.
•
If G is in the SSM group range and matches IGMP SSM mappings, Router A translates (*, G) in
the report into (G, INCLUDE, (S1, S2...)) to provide SSM services.
For more information about SSM group ranges, see

IGMP support for VPNs

IGMP maintains group memberships on a per-interface base. After receiving an IGMP message on
an interface, IGMP processes the packet within the VPN to which the interface belongs. IGMP only
communicates with other multicast protocols within the same VPN instance.
Protocols and standards
•
RFC 1112, Host Extensions for IP Multicasting
•
RFC 2236, Internet Group Management Protocol, Version 2
•
RFC 3376, Internet Group Management Protocol, Version 3
Figure 31, on an SSM network, Host A, Host B, and Host C run IGMPv1, IGMPv2, and
"Configuring
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PIM."