6500 - 'switchport nonegotiate' issue

[peterboroughcc]

Hi guys,

Yesterday I configured 'switchport nonegotiate' on a 6503 and a 6506 on the uplink switchports to neighbouring 3750's.

While our Cisco VoIP phones and all PCs continued to function correctly, our Wyse thin client devices kept kicking the users out of their sessions.

Removing the configuration from the 6500's remedied the problems. However, I left the config on the neighbouring 3750 switchports and also between the 3750's.

Has anybody come across this before? If so, is there a solution to this?

Thanks.

[milan.kulik]

Hi,

I guess without 'switchport nonegotiate' on a 6500s the port is finishing the negotiation as a trunk and all VLANs are working fine?

After adding 'switchport nonegotiate' the trunk negotiation fails and your Wyse VLAN is not working correctly?

What is "switchport mode ..." value on both sides?

HTH,

Milan

[peterboroughcc]

Yes, you are correct with both statements.

'Swicthport mode' is 'trunk' on both sides...

[milan.kulik]

Hi,

I guess without 'switchport nonegotiate' on a 6500s the port is finishing the negotiation as a trunk and all VLANs are working fine?

After adding 'switchport nonegotiate' the trunk negotiation fails and your Wyse VLAN is not working correctly?

What is "switchport mode ..." value on both sides?

HTH,

Milan