IPMV Packet Flows Configuring IP Multicast VLAN
page 33-8 OmniSwitch 6800/6850/9000 Network Configuration Guide March 2008
Enterprise Mode
In the Enterprise mode, two types of control packets ingress on the receiver ports. The paths taken by the
packets (as shown in the diagram on page 33-5) are described in the following subsections.
Untagged Control Packets Ingressing on the Receiver Port
The following steps describe the path taken by untagged control packets ingressing on the receiver port:
1 Untagged IPMS join reports for the multicast group G1 are sent to the receiver port.
2 The IPMS reports sent to the CPU of the Ethernet switch are single-tagged with the default VLAN.
3 IPMS overwrites the tag with the IPMV tag after IPMV table lookup.
4 A single IPMS report, single-tagged with IPMV, is sent to the multicast server for group G1.
5 The single multicast data packet, single-tagged with IPMV, is generated by the multicast server for
group G1.
6 The generated multicast data packets are flooded on the receiver port. These data packets are untagged.
Tagged Control Packets Ingressing on the Receiver Port
The following steps describe the path taken by tagged control packets ingressing on the receiver port:
1 The single-tagged IPMS join reports for the multicast group G1 are sent to the receiver port.
2 The IPMS reports are sent to the CPU of the Ethernet switch.
3 IPMS overwrites the tag with the IPMV tag after IPMV table lookup.
4 A single IPMS report, single-tagged with IPMV, is sent to the multicast server for group G1.
5 The single multicast data packet, single-tagged with IPMV, is generated by the multicast server for
group G1.
6 The generated multicast data packets are flooded on the receiver port. These data packets are untagged.
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