Vlan mismatch error

All,
I have investigated and made sure the speed/duplex have been changed between both devices attached to int-faces.
here is my error.
02-ext-liv FastEthernet0/20 (40).
Feb 20 16:22:18.711 PST: %CDP-4-NATIVE_VLAN_MISMATCH: Native VLAN mismatch discovered on FastEthernet0/xx
2900 series switch.
What other approach shall I take to pin point the issue since this is only informational on the error log.
-fz
Thanks in advance!

Hi,
The 'error' message is simply because you have used different VLAN IDs on the access ports at either end. CDP discovers this and logs a warning. The message is pretty harmless in itself.
There are a couple of options to get rid of it:
- configure the access port to be the same VLAN on the two switches at either end of the link
--- OR ----
- enable CDP version 1 on your switches. YOu can do this using: 'no cdp advertise-v2'.
The latter option is simpler and you don't really lose much...
Hope that helps - pls rate the post if it does.
Paresh

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