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3550 cat 4000 Trunking Problem

trunking is not working between 3550 run IOS 12.1-9 and cat 4000 runing cat4000.6-3-5.bin

when the trunking enabled with mode on amd encap dot1q , we lost connectivity between the 2 switches.

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Cisco Employee

Re: 3550 cat 4000 Trunking Problem

Can you paste the output of sh trunk from the Cat4000 and the relevant config from 3550

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