10-30-2003 09:49 AM - edited 03-02-2019 11:22 AM
HERE IS THE PROBLEM:
*Jun 14 12:25:54: %CDP-4-DUPLEX_MISMATCH: duplex mismatch discovered on GigabitEthernet4/10 (not full duplex), with 3550_2 GigabitEthernet0/1 (full duplex).
I am pretty sure it's something wrong with the setup of the trunking, but I have never seen "unknown 0" listed instead of "media-type LX" or whatever.
Below is the sh interfaces for each.
This is a link from a 4006 to a 3550. The 4006 shows tons of CRC errors, the 3550 does not.
Korr_4006P
interface GigabitEthernet4/10
switchport mode trunk
3550_2#
interface GigabitEthernet0/1
description Link to 4006
switchport trunk encapsulation dot1q
switchport mode trunk
no ip address
10-30-2003 10:27 AM
I would try to nail down speed/duplex (100,FULL) on both ends of this connection. The errors you are seeing are consistent with speed/duplex issues.
10-30-2003 10:37 AM
Thank you for the response, but...
For a 100 meg connection yes, that is exactly what I would do. But this is a 1000Meg link. Longhaul gbics going fiber from switch to switch. There is no "duplex full" option.
I still think it's a problem with the setup of trunking, but I hope someone here will tell me!!!
10-30-2003 11:41 PM
Hi,
I wouldn't think this is a trunk problem.
I would just for sure add
switchport trunk encapsulation dot1q
to 4006 config (I'm not sure is 4006 IOS provides ISL as default trunk encapsulation), but I don't think this is the problem.
If the 4006 shows tons of CRC errors, I'd consider either a cable or GBIC problem.
Regards,
Milan
10-31-2003 08:40 AM
Some modules in CAT4k and 3550 do 10/100/1000. Can you paste the output of sh ver from 3550 and sh mod from 4000?
Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community: