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Problem with Trunk ISL and Native VLAN

avallenilla
Level 1
Level 1

‎11-21-2002 11:32 AM - edited ‎03-02-2019 03:05 AM

Hi, I need help. Executing show tech-support i see the next messages:

WARNING: The neighbors with the following device IDs have an unknown devices.

Why i see this warning?

I have configured trunk links isl and every switch have a VLAN administrative diferent the VLAN 1.

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2 Replies 2

fmeetz
Level 4
Level 4

‎11-27-2002 12:27 PM

I've never heard/seen that one before. Did you ever find out what was causing it?

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vmiller
Level 7
Level 7

‎11-27-2002 04:08 PM

what are the neighboring devices ? and what are the device IDs ?

I suspect a cdp problem rather than an ISL issue, unless the neighbors on the

trunks are non cisco, in which case you should consider 802.1q

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