Avaya 8800 Planning And Engineering, Network Design page 166

SPBM design guidelines
Note:
With IP Shortcuts, no I-SID is required. I-SID configuration is required only for virtual
services such as L2 VSN and L3 VSN.
IST
If the switch will be part of an SMLT cluster, you must create the IST prior to enabling IS-IS.
SMLT
• Each switch in the cluster must be configured to peer with its neighbor. If the IS-IS interface
between them is the IST MLT (recommended, but not strictly required), traffic paths will
generally be similar to existing behavior.
• A virtual B-MAC is automatically created based on the lowest system ID in the cluster plus one.
Important:
The virtual B-MAC or any System ID created must not conflict with any other System ID or
virtual B-MAC in the network. Verify that there is no duplication of System IDs or virtual B-
MACs anywhere in the network .
A safe practice is to leave the lowest byte in the system ID as all zeroes.
• There is a consistency check in place to ensure that L2 VSN VLANs cannot be added to the
IST.
Physical or MLT links between IS-IS switches
Only a single port or single MLT is supported between a pair of IS-IS switches. For example, if there
are two individual ports between a pair of IS-IS switches, IS-IS can only be configured on one of the
two ports.
If a single MLT is configured between a pair of IS-IS switches, all ports (1-8) in the MLT are utilized.
Note that you must configure the MLT before you enable IS-IS on the MLT.
CFM
• The CFM Domain name must be the same on all switches in an IS-IS area.
• The Maintenance Association must be the same on all switches in an IS-IS area.
- To allow CFM testing over both B-VLANs, create two Maintenance Associations, one for
each B-VLAN.
• The MIP can be configured the same on all switches in an IS-IS area or uniquely defined per
switch.
Note:
To enable CFM in release 7.2, you do not have to configure a Domain Name, Maintenance
Association, or Maintenance Endpoint. You only have to enable CFM on the Customer MAC (C-
MAC) and SPBM.
Important:
The MIP must be configured at the same level as the MEP on all switches in the SPBM network.
Example of a configuration using best practices
- spbm-id
- BVID #1 & BVID #2
June 2016
: 1
: 4040, 4041 (ignore warning message when configuring)
Planning and Engineering — Network Design
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