Trunking problem between 2950 and 3750

[tunemore1]

I had following:

On 2950

=======

int fa0/25

switchport trunk

On 3750

=======

int gi1/0/1

switchport trunk encapsulation dot1q

switchport mode trunk

Any help?

Thanks

[m-haddad]

As long as I remember the 2950 supports only ISL trunks. Try setting the trunk on the 3750 to ISL.

Let me know how it goes,

Regards,

[m-haddad]

Try to issue the command show interface trunk

Check if the Trunking is ON and what is the encapsulation used on each switch.

Regards,

[Collin Clark]

2950's support dot1q. show log should produce useful information.

[glen.grant]

The 2950's only support dot1q . People seem to like to try and force the trunks on ,myself I prefer to let them negotiate and have never had a problem doing this , try on each side adding "switchport mode dynamic desirable " and this should bring the trunk up . Check your vtp settings , set both as transparent if that is the way you want it and the vtp domain name on each switch "MUST" match exactly for the trunkl to come up .