CM 5.2.1 shows Ethernet1000M between WLC and 3750 switch

Unanswered Question
Nov 30th, 2009

I am using LMS 3.2 with Campus 5.2.1 and the topology map is showing one Ethernet1000M bus between

the WLC 4402 and the 3750 switch instead of a direct connection.

The cdp info on both the WLC and the switch shows each other.

See the topology map attached.

Besides this, there are two connections between the WLC and the Ethernet1000M bus.

Only one physical port on the WLC is connected but there is a trunk on this port.


On the switch the received IP address from the WLC cdp is the (vlan 202).

On the WLC the received IP address from the switch cdp is (vlan 10).

  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
Joe Clarke Mon, 11/30/2009 - 14:59

Post the SNMP Walk output for the ciscoCdpMIB branch from both devices.

Leo Laohoo Mon, 11/30/2009 - 15:42

Doesn't the WLC talk only in GigabitEthernet (fibre or copper)?

Joe Clarke Tue, 12/01/2009 - 09:44

This looks okay.  There could be bad data in the ANI database.  Try deleteing both of these devices from the map, then run a new Campus Data Collection, and see if the links go away.  That said, you may need to reinitialize your ANI database to clear the bad topo entry.

rgomes Thu, 12/03/2009 - 09:18

I have deleted both devices, the WLC and the switch, reinitialized the ANI database and run the collection again.

The topology is like before, with the Ethernet1000M  bus and the two links from the WLC to the bus.

Any other suggestion?

Joe Clarke Thu, 12/03/2009 - 09:23

Based on just the CDP neighbor data, I don't see why this bus is occurring.  The reinit should have cleared any bad data up.  You may have another bug, but I don't have such a topology to test.  Open a TAC service request so the right debugging can be captured.

rgomes Thu, 12/03/2009 - 10:40

The TAC service request 613125017 was opened to handle this problem.


This Discussion