Avaya 8800 Planning And Engineering, Network Design page 149

Figure 64: Migrating an existing configuration into SPBM
• For Layer 2 virtualized bridging (L2 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 (L3 VSN), map IPv4-enabled VLANs to VRFs, create an IPVPN
instance on the VRF, assign an I-SID to it, 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 should be back to normal.
SPBM supports the following kinds of traffic:
• Layer-2 bridged traffic (L2 VSN)
• IPv4 unicast routed traffic on the Global Router (IP Shortcuts)
• IPv4 unicast routed traffic using a VRF (L3 VSN)
• IPv4 Unicast routed traffic using an IPVPN-Lite over SPBM
If your existing edge configuration uses SMLT, you can maintain that SMLT-based resiliency for
services configured on the IST peer switches. SPBM requires that you upgrade both IST peers to
7.2 and identify two VLANs to be used as B-VLANs. SPBM then automatically creates a virtual
backbone MAC for the IST pair and advertises it with IS-IS. By operating two SPBM switches in
Switch Clustering (SMLT) mode, you can achieve redundant connectivity between the C-VLAN
domain and the SPBM infrastructure. This allows the dual homing of any traditional link aggregation
capable device into an SPBM network.
Related links
SPBM design guidelines
SPBM campus architecture
SPBM multicast architecture
Large data center architecture
June 2016
on page 138
on page 150
on page 153
on page 153
Planning and Engineering — Network Design
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SPBM reference architectures
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