Alcatel-Lucent OmniSwitch 6850-48 Network Configuration Manual page 1017

Configuring IP Multicast VLAN
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.
OmniSwitch AOS Release 6 Network Configuration Guide September 2009
IPMV Packet Flows
page 43-7