Partition repair guidelines
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When to use partition repair
Only provision nodes to be
partition repair capable in an area, since a
single point of
failure otherwise cannot be avoided for that area. If more than one level 2 entry into
an area is used, partition repair is a valid mechanism.
How to use partition repair
To allow the healing of a partitioned area, two nodes must be provisioned as “partition
repair capable” as follows:
•
At the area boundary, connecting level 2 nodes in other areas
•
The potential virtual link (tunnel) should reduce the SPFs in the area to a
minimum.
In case an area is partitioned due to a single failure, the two partition repair capable
level-2 nodes in each partition establish a level-1 tunnel through the level-2 subdomain,
to repair level-1 connectivity between all nodes in the two related partitions.
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