"no cdp advertise-v2" will stop these messages, since the "unmatching duplex" reporting functionality (+ native vlan mismatch) has been added in CDP v2.
-- Tassos Jay Hennigan wrote on 3/12/2007 7:30 πμ: > Tuc at T-B-O-H.NET wrote: >> Hi, >> >> I'm getting on a 3640 running (C3640-JK9S-M), Version 12.4(13a) : >> >> Dec 1 13:07:26 EST: %CDP-4-DUPLEX_MISMATCH: duplex mismatch discovered on >> Ethernet0/0 (not full duplex), with c2924-1.house.tucs-beachin-obx-house.com >> FastEthernet0/15 (full duplex). >> >> The problem is that E0/0 is 10/half and facing a transit provider, >> while E0/1 is part of a bridge group with E1/1, and E0/1 also at 10/half >> connects to port FA0/24 on c2924-1.house.tucs-beachin-obx-house.com (At >> 10/half). Port FA0/15 is connected to a consumer Ethernet over Power >> extender.... >> (And yea, THAT is 100 full). >> >> Does CDP need EVERYTHING to be running the same speed/duplex even >> when not connected directly together? > > 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. > > -- > Jay Hennigan - CCIE #7880 - Network Engineering - [EMAIL PROTECTED] > Impulse Internet Service - http://www.impulse.net/ > Your local telephone and internet company - 805 884-6323 - WB6RDV > _______________________________________________ > cisco-nsp mailing list [email protected] > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ > _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
