trunking Catalyst 2950 to Catalyst 3750 problem

[DarylPienta]

I cannot seem to figure out how to trunk a catalyst 3750 to a Catalyst 2950.

I've set

3750(config)#interface fastethernet 1/0/2

switchport mode trunk

switchport trunk encapsulation dot1q

BUT my Catalyst 2950 does not offer the "switchport trunk encapsulation dot1q" command

My 2950 is running IOS version 12.1(20)EA1a

is there a work around for this situation. Our network still employs a bunch of these 2950's.

[konigl]

The Catalyst 2950 series can only do 802.1Q trunking. It's the default, and only, choice. So there's no need to specify it when trunking.

In fact, since you don't have a choice of which encapsulation to use, there's no need for a "switchport trunk encapsulation" command. Which is why it's missing from the Cat2950 switch IOS.

This took me by surprise too, when I first transitioned out of the 3500XL series into 2950 and 3550 switches.

[thisisshanky]

Like Larry said, you dont need to enable dot1q on 2950, as it doesnt support any thing else other than dot1q. I would think all you need on the fastE interface of 2950 is "switchport mode trunk" command.