I tried to configure sub interfaces in our Cisco 2611 router as follows.
Router1(config)#interface fastEthernet 0/1.1
(config-subif)#ip address 172.16.2.0 255.255.255.0
but this gives the following error.
% 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.
what was the cause for this error?
Also the router does not provide encapsulation dot1Q 2 ...... commands in the subinterface mode.
Is this router not provide this feature??