Flapping of cluster members with Bond configured in Load Sharing mode when the neighboring switch is rebooted

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Technical Level

Symptoms

Flapping of cluster members with Bond interface configured in Load Sharing mode when the neighboring switch is rebooted

Cause

Chain of events in the case that was reported to Check Point:

Cluster members are connected to a switch
The switch is rebooted
The switc gs the physical link "UP" on its ports before it is ready to pass traffic
Since the link is "UP" on the switch's ports, the link is also goes "UP" on the slaves of the Bond interface on cluster members
The Bond interface on the cluster member goes in to "Active" state
If the option "Switch to higher priority Cluster Member" is configured in the cluster object, the cluster fails back to the higher priority member for a few seconds
This causes a short traffic outage

Solution

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