Hi everyone.
We have two 4110 chassis cluster configuration in our large DC with FTD 6.4.0.9 appliance.
Both chassis connected to core switch WS-C6509-E
A few month cluster can work properly, then after maintenance reboot, they cannot join the cluster together.
At this point one node became a master in the cluster, but second node doesnt see master to join as a slave.
Also DATA portchannel on second node became failed with interface operational status "suspended".
On the switch it looks like -
csw-1#show etherchannel summary | i Po55
Group Port-channel Protocol Ports
------+-------------+-----------+------------------------
55 Po55(SU) LACP Te5/5(I) Te6/5(P)
This problem appears periodically. And then it can be resolved after random reboot or interface down/up
What can be the reason that cluster cannot come up?
Who have the same core switch, do you have similar problems?
For more informative i have attached our L1 schema
