Sub-interfaces to Separate routes

[taimoor4engg]

Hey Guys, 

We have a router with three sub-interfaces Gig0/1.111, Gig0/1.222 and Gig 0/1.333. 

I would like to set Gig 0/1.111 and 1.222 to use Gig0/2 ISP and Gig0/1.333 to use Gig 0/3 ISP.

My problem is we cant use VRF and static routing due to limitation. 

Is there any other way I can achieve it ?

Thanks

[paul driver]

Hello

Does you rtr support Policy Based Routing ( PBR) ?
res

Paul

[taimoor4engg]

No its 1800 series old ATT router, its not supported. 

[Julio E. Moisa]

Hi

I agree with Paul, I have some 1800 routers and it works, the config could be:

ip access-list NET1-TO-ISP

deny ip 192.168.111.0 0.0.0.255  10.0.0.0 0.255.255.255

deny ip 192.168.111.0 0.0.0.255  172.16.0.0 0.15.255.255

deny ip 192.168.111.0 0.0.0.255  192.168.0.0 0.0.255.255

permit ip any any

ip access-list NET2-TO-ISP

deny ip 192.168.222.0 0.0.0.255  10.0.0.0 0.255.255.255

deny ip 192.168.222.0 0.0.0.255  172.16.0.0 0.15.255.255

deny ip 192.168.222.0 0.0.0.255  192.168.0.0 0.0.255.255

permit ip any any

ip access-list NET3-TO-ISP

deny ip 192.168.333.0 0.0.0.255  10.0.0.0 0.255.255.255

deny ip 192.168.333.0 0.0.0.255  172.16.0.0 0.15.255.255

deny ip 192.168.333.0 0.0.0.255  192.168.0.0 0.0.255.255

permit ip any any

<next hops: 1.1.1.1 ISP1 and 2.2.2.2 ISP2>

route-map NET1-TO-ISP permit

match ip address NET1-TO-ISP

set ip next-hop 1.1.1.1

route-map NET2-TO-ISP permit

match ip address NET2-TO-ISP

set ip next-hop 1.1.1.1

route-map NET3-TO-ISP permit

match ip address NET3-TO-ISP

set ip next-hop 2.2.2.2

interface fa0/0.111

ip policy route-map NET1-TO-ISP

interface fa0/0.222

ip policy route-map NET2-TO-ISP

interface fa0/0.333

ip policy route-map NET3-TO-ISP

Hope it is useful

:-)