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STP and Channel

lformelli
Level 1
Level 1

‎05-17-2002 11:03 PM - edited ‎03-01-2019 09:47 PM

I have found already in two situations really problems when are configured connections between two Switches in Channel on fiber Gbic (trunk) and redundant Channel on copper FastEthernet(ever on trunk) from both Catalyst 6000 or 5000.

The connection became unstable and it seems that STP doesn't work in order.

In fact seems that the links on copper doesn't go in blocking but go in forwarding also it isn't configure with best priority naturally.

Do somebody know problems about STP with channel?

best regards

Lorenzo

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Prashanth Krishnappa
Cisco Employee
Cisco Employee

‎05-18-2002 01:41 PM

Lorenzo

You should be able to channel and trunk over it fine without any STP issues. But make sure you configure channel first and then trunk over it. Also if it is between 2 CATOS switches, use desirable as the channel and trunk mode. Also enable UDLD to see if there is any unidirectional links

Regards,

-Prashanth

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