Design Reference

Figure 37: Access to the SPBM Core
For Layer 2 virtualized bridging (Layer 2 VSN), identify all the VLANs that you want to migrate
into SPBM and assign them to an I-SID on the BEB.
For Layer 3 virtualized routing (Layer 3 VSN), map IPv4-enabled VLANs to VRFs, create an
IP VPN instance on the VRF, assign an I-SID to the VRF, and then configure the desired IP
redistribution of IP routes into IS-IS.
All BEBs that have the same I-SID configured can participate in the same VSN. That completes
the configuration part of the migration and all the traffic flows will be back to normal.
SPBM on Virtual Services Platform 4000 supports the following traffic:
• Layer-2 bridged traffic (Layer 2 VSN)
• IPv4 unicast routed traffic on the Global Router (IP shortcuts)
• IPv4 unicast routed traffic using a VRF (Layer 3 VSN)
• IPv4 unicast routed traffic using different VSNs, which have different I-SIDs (Inter-VSN)
• Layer-2 IP multicast traffic in a bridged network (Layer 2 VSN with IP multicast over
SPBM)
Reference architectures
Network Design Reference for Avaya VSP 4000 February 2014 85