[c-nsp] %CDP-4-DUPLEX_MISMATCH - But they aren't connected!

[Jay Hennigan]

Tuc at T-B-O-H.NET wrote:

>>> 	The setup looks like this :
>>>
>>> TRANSIT1                  TRANSIT2
>>>    |                         |
>>>    |-E0/0                    |-E1/0
>>>    |                         |
>>> -------------------------------------
>>>               3640
>>> -------------------------------------
>>>    |                         |
>>>    |-E0/1                    |-E1/1
>>>    |--------BVI1-------------|
>>>    |                         |
>>>    |-FA0/24                  |-FA0/24
>>> ----------                ------------
>>> 2924-1                      2924-2
>>> ---------                 ------------
>>>   |-FA0/15
>>>   |
>>>   |-Netgear Ethernet Over Power Extender
>>>
>>> 	So its complaining that FA0/15 on 2924-1 is mismatched
>>> to E0/0 on the 3640. Well, DUH, no fooling. I would think 
>>> the only things it cares about are 3640~E0/1&2924-1~FA0/24
>>> and 3640~E1/1&2924-2~FA0/24 since those are the only 2 places
>>> that the Ciscos directly connect. 
>> What is on the other end of the Netgear Ethernet Over Power Extender on 
>> Fa0/15 on 2924-1?
>>
> 	The other end is a NetGear Ethernet Over Power Router
> (WGX102, part of the WGXB102 kit)
>> Which device is complaining?  2924-1, the 3640, or both?
>>
> 	3640.......

Unless there is some type of bridging or leakage between TRANSIT1 and 
the Netgear kit, it sure looks like a very strange bug.  E0/0 on the 
3640 isn't in any way touching Fa0/15 on 2924-1 at layer 2.

--
Jay Hennigan - CCIE #7880 - Network Engineering - jay at impulse.net
Impulse Internet Service  -  http://www.impulse.net/
Your local telephone and internet company - 805 884-6323 - WB6RDV