Configuring IP Multicast VLAN IPMV Packet Flows
OmniSwitch 6800/6850/9000 Network Configuration Guide March 2008 page 33-7
5 The single multicast double-tagged data packets with an IPMV outer tag and a CVLAN inner tag are
generated by the multicast server for group G1.
6 The VLAN Stacking egress logic removes the IPMV outer tag. The generated multicast data packets
flooded on the receiver port are single-tagged with CVLAN.
Note. All the IPMS control traffic specified for a single multicast service should be tagged with the same
CVLAN.
Single-Tagged Control Packets (with CVLAN) Ingressing on the Receiver Port
in the VLAN Stacking Translation Mode
The following steps describe the path taken by single-tagged control packets ingressing on the receiver
port in the VLAN Stacking translation mode:
1 The IPMS join reports for multicast group G1, which are single-tagged with the CVLAN tag (c-tag)
are sent to the receiver port.
2 CVLAN tags are replaced by the SVLAN tags in all the IPMS reports going to the CPU of the Ether-
net switch.
3 IPMS overwrites the SVLAN tags with the IPMV tags after IPMV table lookup.
4 A single IPMV-tagged IPMS report is sent to the multicast server for Group G1.
5 The single multicast packets single-tagged with IPMV are generated by the multicast server for group
G1.
6 The VLAN Stacking egress logic replaces the IPMV tag with the CVLAN tag. The multicast data
packets flooded on the receiver port are single-tagged with CVLAN.
Note. All the IPMS control traffic specified for a single multicast service should be tagged with the same
CVLAN.
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