Hello all,
Before I open a case with TAC, I would like to see if the community has any ideas about this problem.
- 7005 controller running 6.4.2.8 connected in VLAN 1
- 11x AP-205 connected in VLAN 30
Randomly, the APs lost connection to the controller. Our monitoring system, outside the customer network, picks up on connectivity issues to the VLAN 1 IP address. The problem takes around 2-5 minutes to resolve itself without intervention.
During the problem though, the controller can be accessed from any other host locally in the VLAN 1 subnet. That's why I "identify" the problem as "controller looses default route". Both IP and default route are static.
To make sure this is not a general problem, I'm monitoring 2 other devices in the VLAN 1 network. They don't have any connection issues.
Couple of things tried already:
- made sure spanning-tree is not the cause of the issue. If this was the issue, then the controller would not be accessible from VLAN 1 either I would think
- during the problem, there is an ARP entry for the default gateway on the controller.
- connected the controller to another switch, mac address is not lost on the switch. Again, if this was the issue, then the controller would not be accessible from VLAN 1
- statically configured mac-address and ARP entry on the switch the controller is connected to
- checked the system log
As a workaround, because the AP's rebootstrapped or rebooted, I have put them in VLAN 1 for now. The connectivity issues are still there, but the users don't notice them any more (they are also in VLAN 1).
Thanks already.