I got a situation with my router which is a 1760 with 2 ADSL Wics with 2 diferents ISP. What I want is any traffic that comes from internet to one of my interfaces, goes back for the same interface. I got a default route pointing to internet taking the first ISP with a lowest AD and other as backup, but what happen is when I try to reach the backup interface from internet It doesn't respond, but as soon as I put the backup link as primary the link is reachable again. The reason why I need both links on is because I got a web server behind the router and I want that users from internet can use both links to access it.
I´m wondering if I can solve this with vrf or pbr ?
It would also work to set up 3 vrf's, one for isp1, one for isp2 and the third for the webserver. The two isp vrf's imports the rt for the webserver and the webserver imports the rt's for both isp vrf's. The same can be applied for internet access, an internet access vrf which imports both isp rt's and the isp vrf's import the internet access vrf.