Still searching - encapsulation not valid?

Computer idiot

My 3810 router - which is way better than my 2600 - doesn't seem to be able to do encapsulation commands. Here's what happens:

(config)#int e0.1
(config-if)#encapsulation dot1q 2
% Invalid input detected at '^' marker.

When I do this command to check...

(config-if)#?

...the list of commands that come up don't list anything about "encapsulation." Does this mean I can't hook up different devices to my switch - going to my 3810 router - and have them in different vlans? I have a laptop and two IP phones, and I want to separate the voice from the data. I can do it fine with my 2600 router, but it's just a bare-bones router. I called Cisco, but they said since my ebay router isn't under warranty, they can't answer my question(!) I'm methodically going through the forums, trying to find an answer to this question. No success yet. Nowhere else to turn, either.

I'm not trying to do frame-relay - I just want to create some sub-interfaces, which I can do, but it refuses to go further without an encapsulation command. Here's what I wanted to do:

(config)#int e0.2
(config-if)#encapsulation dot1q 2
(config-subif)#ip address 10.2.0.1 255.255.255.0
(config-subif)#int e 0.20
(config-subif)#encapsulation dot1q 20 native
(config-subif)#ip address 10.20.0.1 255.255.255.0
(config-subif)#int e 0.25
(config-subif)#encapsulation dot1q 25
(config-subif)#ip address 10.25.0.1 255.255.255.0
(config-subif)#int e 0
(config-subif)#exit
(config-if)#no shut

networker050184

Looks like you are out of luck as far as 802.1Q trunking on the MC3810. You can search through the Cisco Feature Navigator but a quick search didn't show any support for 802.1Q trunking on the MC3810 for me.