Spbm Reference Architectures - Avaya 8800 Planning And Engineering, Network Design

SPBM design guidelines
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SPBM design guidelines

SPBM reference architectures

SPBM has a straightforward architecture that simply forwards encapsulated C-MACs across the
backbone. Because the B-MAC header stays the same across the network, there is no need to
swap a label or do a route lookup at each node. This allows the frame to follow the most efficient
forwarding path from end to end.
The following figure shows the MAC-in-MAC SPBM domain with Backbone Edge Bridges (BEBs) on
the boundary and Backbone Core Bridges (BCBs) in the core.
Figure 63: SPBM architecture
Provisioning an SPBM core is as simple as enabling SPBM and IS-IS globally on all the nodes and
on the core facing links. To migrate an existing edge configuration into an SPBM network is just as
simple.
The boundary between the MAC-in-MAC SPBM domain and the 802.1Q domain is handled by the
Backbone Edge Bridges (BEBs). At the BEBs, VLANs or VRFs are mapped into I-SIDs based on the
local service provisioning. Services (whether L2 or L3 VSNs) only need to be configured at the edge
of the SPBM backbone (on the BEBs). There is no provisioning needed on the core SPBM nodes.
The following figure illustrates an existing Edge connecting to an SPBM Core.
June 2016
on page 138
Planning and Engineering — Network Design
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