How to configure routing like this using subinterface

[jordan-jj]

I got this from keith barker vidoes on ospf load balancing

How to connect two routers using subinterface,

i tried in gns 3 , created subinterfaces but giving an 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.

Also I used encapuslation on both sides and tried to ping but its not pinging 

Any suggestion here would be helpful

tthnks

[Jon Marshall]

That error message occurs when you try to configure an IP address before you have used the "encapsulation dot1q <vlan ID>" command.

But you then say you used encapsulation so it's not clear what you are saying to be honest.

Can you clarify ?

Jon

[jordan-jj]

R1: interface fa0/0.10

R!:encapsulation dot1q 10

R1:: ip address 10.10.10.1 255.255.255.0

R2: interface fa0/0.10

R2:encapsulation dot1q 10

R2:: ip address 10.10.10.2 255.255.255.0

After  the above configuration i tried to ping from R1 and R2 , but its not pinging.

[Jon Marshall]

Configuration is fine, have you brought the interfaces up ie. "sh ip int br"

Jon

[jordan-jj]

Both the interface status shows  " administratively down " in each router. i tried  a no shut command

i tried  a no shut command, but still statuss remains unchanged

[Jon Marshall · Accepted solution]

You need to do "no shut" under the main interface.

Jon

[jordan-jj]

yes ..yes.. Thanks for that..