Brocade Network Advisor SAN User Manual v12.3.0 - Manual (Page 993)

Brocade Network Advisor SAN User Manual 941
53-1003154-01
FCIP trunking
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Table 74 illustrates circuit failover in a tunnel with circuits in failover groups and circuits that are not
part of failover groups. In this configuration, all data is initially load balanced over circuit.1, circuit
2, and circuit 3 (when they are all active). The following occurs during circuit failover:
• If circuit1 fails, circuit 4 becomes active and data is load balanced over circuit 2, circuit 3, and
circuit 4.
Reason: Circuit 1 fails over to circuit 4 (both are in failover group 1) and circuit 3 is active with
500Mb bandwidth.
• If circuit 2 fails, data is load balanced over circuit 1 and circuit 3, and no other circuit becomes
active.
Reason: Circuit 1 and 3 are the only active circuits since circuit 4 and 5 only become active
when circuits 3 or 1 fail.
• If circuit 2 and circuit 3 fail, circuit 5 becomes active and data is load balanced over circuit 1
and circuit 5.
Reason: Ungrouped circuits 2 and 3 fail over to ungrouped circuit 5, which has a metric of 0.
• If circuit 1, circuit 2, and circuit 3 fail, circuit 4 and circuit 5 become active and data is load
balanced over both.
Reason: Circuit 1 fails over to circuit 4, which is the failover circuit for group 1 with a metric of
0. Ungrouped circuit 5 is the failover circuit for ungrouped, failed circuits 2 and 3.
. TABLE 74 Tunnel with failover groups and non-grouped circuits
Circuits in tunnel Failover group ID Circuit bandwidth In use for tunnel data
Circuit 1
Metric 0 1 500Mb If active, yes.
Circuit 2
Metric 0 Not defined. 500Mb If active, yes.
Circuit 3
Metric 0 Not defined. 500Mb If active, yes.
Circuit 4
Metric 1 1 500Mb Only when circuit 1
fails.
Circuit 5
Metric 1 Not defined 1000Mb Only when circuit 2
and 3 fails.