Hello, I'm in the midst of setting up redundant MPLS routers to connect up all our branches. We currently only have 1 WAN router for MPLS and are adding a second. I have attached a picture that will make the story more clear. For the sake of this argument, I'm only concerned about outbound routing out of my AS destined to the branches....in which I will be using LOCAL_PREF to advertise to everyone who speaks iBGP in my network.
I have made the following route-map and would like to add it to my 2 WAN routers in the following fashion:
WAN Router 1#
!
route-map main-route permit 10
match ip address prefix-list all-branches
set local pref 200
!
ip prefix-list all-branches 0.0.0.0/0 le 32
!
router bgp 65656
neighbor ISP-Router route-map main-route in
!
--------------------------------------------
WAN Router 2#
!
route-map secondary-route permit 10
match ip address prefix-list all-branches
set local pref 150
!
ip prefix-list all-branches 0.0.0.0/0 le 32
!
router bgp 65656
neighbor ISP-Router route-map secondary-route in
!
So my concern here is that all my branches are across so many different subnets that it is hard for me to make individual prefixes or even summarize in prefixes to touch all the branches, so instead I just made a prefix-list encompassing everything (0.0.0.0/0 le 32). I was wondering if anyone sees any issues with this? I've never done anything like this before, I don't personally see any issues with this but I just want everything that is destined to branches to go through WANRouter1 first, and if that fails, go to WAN Router2...
