one physical int and 2 logical? 1

[cygnul]

Hi

I have a 2505 router at home that im trying to get working. I only have 1 eth interface available. What is want to know is - is it possible to set up sub-interfaces and route down the same ethernet int? It would seem impossible to me.

cheers
cygnul

 

[Jsteve]

Yes it is posible.

router>#enable
router>(config)#int e0
router>(config-if)#no ip address
router>(config-if)#int e0.1
router>(config-if)#ip address 172.16.1.1 255.255.255.0
router>(config-if)#no shut
router>(config-if)#int e0.2
router>(config-if)#ip address 172.16.1.2 255.255.255.0
router>(config-if)#no shut

 

[cygnul]

mmm...am i wrong in thinking that i can only do this from a console? when i remove the ip from eth0 i get discon (predictably)

 

[Jsteve]

try the commands without the "no ip address" line.

If your telnetting into the ethernet port you will get
disconnected once you clear the ip address.

 

[Jsteve]

If that dosen't work try,

router>(config)#int e0 secondary
router>(config-if)#ip address 172.16.1.1 255.255.255.0

and leave the first address as is.