Spanning Tree Protocol; Configuration Guidelines; Configuring Layer 2 Failover - IBM RackSwitch G8000 Application Manual

Spanning Tree Protocol

Configuration Guidelines

Configuring Layer 2 Failover

© Copyright IBM Corp. 2011
If Spanning Tree Protocol (STP) is enabled on the ports in a failover trigger, the
switch monitors the port STP state rather than the link state. A port failure results
when STP is not in a Forwarding state (such as Listening, Learning, Blocking, or No
Link). The switch automatically disables the appropriate control ports.
When the switch determines that ports in the trigger are in STP Forwarding state,
then it automatically enables the appropriate control ports. The switch fails back to
normal operation.
This section provides important information about configuring Layer 2 Failover.
• Any specific failover trigger can monitor ports only, static trunks only, or LACP
trunks only. The different types cannot be combined in the same trigger.
• A maximum of 52 LACP keys can be added per trigger.
• Port membership for different triggers must not overlap. Any specific port must
be a member of only one trigger.
Use the following procedure to configure a Layer 2 Failover Manual Monitor.
1. Specify the links to monitor.
>> # failover trigger 1 mmon monitor member 1-5
2. Specify the links to disable when the failover limit is reached.
>> # failover trigger 1 mmon control member 6-10
3. Configure general Failover parameters.
>> # failover enable
>> # failover trigger 1 enable
>> # failover trigger 1 limit 2
Chapter 24. Layer 2 Failover
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