Design Reference

Table Of Contents
Figure 22: Multicast SMLT square 3
In the preceding figure, both of the switch cluster cores and the edge devices perform Layer 3
multicast routing.
Use an edge device that supports a form of link aggregation. Disable spanning tree on the link
aggregation group on the edge devices. Enable either the VRRP BackupMaster or RSMLT Layer 2
Edge on the switch cluster cores. Do not enable VRRP on the RSMLT VLAN between switch cluster
cores.
Related Links
Layer 3 switch clustering and multicast SMLT on page 62
SMLT and multicast traffic issues
If PIM-SM or other multicast protocols are used in an SMLT environment, enable the protocol on the
vIST. Routing protocols in general are not run over an vIST but multicast routing protocols are an
SMLT and multicast traffic issues
June 2015 Network Design Reference for Avaya VSP 4000 Series 69
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