Avaya 8800 Planning And Engineering, Network Design page 175

The following figure shows multicast traffic, from either a wired port or wireless tunnel, going to the
incoming VLAN (V1).
Because the multicast traffic was sent to a WSP on which Remote VLAN (RVlan V2) resides, and
the mobility clients are registered as receivers for the multicast stream through RVlan V2, the
multicast traffic must traverse this WSP twice to get to the receivers:
1. The first pass is from the Sender through WSP1 to the mobility VLAN server (MVlan Server)
on WSP2.
2. The second pass is from MVlan Server back through the mobility tunnel (MT) to WSP1 and
then through the access tunnel (AT) to the mobility clients.
As a result, two IpmcPep records are required to handle each of these multicast streams. In this
scenario, ERS 8800/8600 switches enabled with Unified Access support up to 3000 IP multicast
streams. If this scenario is also in an SMLT setup, four IpmcPep records are required and the ERS
8800/8600 switches support up to 1500 IP multicast streams.
Multicast stream with multiple Remote VLANs:
To expand on the above example, suppose there were two mobility clients registered as receivers
for the same multicast stream. However, the mobility clients map to two different mobility VLANs,
neither of which is served by WSP1. In this configuration, the multicast traffic would flow as follows:
• The two mobility clients connect to WSP1 through the same or different access tunnels.
• WSP1 creates two Remote VLANs (RVlan V2 and RVlan V3) and connects the VLAN servers
through mobility tunnels.
• WSP1 sends the multicast packet through a wired interface to WSP2.
June 2016 Planning and Engineering — Network Design
Comments on this document? infodev@avaya.com
General multicast considerations
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