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

Tuc at T-B-O-H.NET ml at t-b-o-h.net
Mon Dec 3 10:03:19 EST 2007


> You'll often see that problem when there are non-Cisco layer 2 devices 
> between the neighbors.
> 
> Some non-Cisco gear relays CDP frames out all interfaces which results 
> in CDP reporting direct connections which in reality are not.  The only 
> workaround of which I am aware is to disable CDP on those interfaces or 
> ignore the error reports.

Hi,

	I'm not sure I explained myself correctly......(And I don't
understand what your trying to accomplish above)

	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. 

	For those that wanted more info, E0/0 is connected
to a Proxim Wireless Broadband antenna at 10/half, E1/0
connected to a Hughes Satellite Modem at 10/half, E0/1 and
E1/1 are bridged (BVI1) and connected to the 2924's at
10/half. The Netgear is connected to 2924-1 at 100/full.

	The 2924's and 3640 are only Cisco equipment at the
site.

		Tuc




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