Hi,
I have purchased a cisco 1750 router for practising different labs, configs and commands on.

I have been studying vlans and decided to set this 1750 up as used for multiple vlans and configured as a "router on a stick" using sub-interfaces.

however I have come across a problem, I create the sub interface using
interface fastethernet 0.1
then proceed to set the encapsulation for vlan 1 with
encapsulation dot1q 1
and get the error below..

Merida(config-subif)#encapsulation dot1q 1
^
% Invalid input detected at '^' marker.

Merida(config-subif)#ip address 192.168.20.1 255.255.255.0

% Configuring IP routing on a LAN subinterface is only allowed if that
subinterface is already configured as part of an IEEE 802.10, IEEE 802.1Q,
or ISL vLAN.

(the ^ is under the dot1q)
i have also tried setting it to isl as well but no matter what i try it will not accept the encapsulation type.

the encapsulation command is listed in the command help for the sub interface.
If I type just encapsulation and hit enter I get
% Incomplete command.

but if i try to get help on the parameters i get this..
Merida(config-subif)#encapsulation ?
% Unrecognized command
Merida(config-subif)#encapsulation

can anyone shed any light on where im going wrong ?

Thanks
Mike

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Have you tried:
encapsulation dot1q 1 native

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thanks for the reply,
yes I have tried it with the native parameter too.
but it actually fails on the dot1q parameter
with this standard error message..
% Invalid input detected at '^' marker.

thanks again
Mike

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Are you using a 1751? Because a 1750 doesn't have 802.1Q VLAN support.

__________________
Boyam

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thatl be what it is then..

mine is definately the 1750 with adsl and bri wics. 8meg flash 48meg ram.

Seeing the encapsulation command in the subif and not knowing enough yet I just took it for granted that it would let me set either isl or dot1q encapsulation.

thanks
Mike

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