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Assuming number of AS hops to destination would be the save via either link, there's a hidden command (bgp bestpath as-path multipath-relax) that will permit usage of both paths.  Otherwise OER/PfR can utilize both paths (at least outbound).

hi Vinayaka,

the features you mentioned al could work such as bgp, PfR or PBR with IP SLA

however in you case you need to think about a scalable, flexible and simple method to achieve your goal

and i would say the simplist is using BGP policies

and the other option using PfR ( but this need a fair amount of testing as you will need to tune some of the timers and polices to meet your needs )

if you go with BGP what you can do ( this apply on using one or two separate routers !)

create ip prefix list to match IP telephone aubnet

and another one to match video subet

outbound on link-1

use a out bound route-map and prepend ASNs to video prefix-list

outbound link-2

use a out bound route-map and prepend ASNs to ip telephony prefix-list

in the inbound direction for remote sites use the same concept but use local prefernce

increase the local preference for remote sites ip telephone inbound from link-1

and inbound from link-2 for video

use the command suggested by joseph above to make sure you can loadbalnce the traffic for a BGP path with differnt ASNs put same number of ASNs in the path

when you going to use iBGP you will need to make sure the loadbalnce will be based on the device before those routers maybe a L3 switch exchanging IGP or iBGP with those edge routers

and again keep it simple always !

see the below figure:

hope this help

Hi Vinayaka,

I understand your problem to seperate the traffic with the aggregate subnets. So, why dont you match the Voice or Video Traffic according to the DSCP marking.

I assume that the ISP does not remark the TOS byte.

You can use to the route map to modify the BGP attribute (local preferecne) by matching instead of a prefix list the dscp value .

I see from your config that you use

dscp af41 for video

dscp EF for voice

Hope that helps

Vasilis

Hi again,

I was thinking about an question for BGP to tan other post and I wrote sth that is not clear to my previous post...

So I will modify my previous post to make clear what i meant.

After matching via a route map the different DSCP values for the voice and video, then you can assign a differnet next hop ip (policy based routing).

dscp af41 for video

dscp EF for voice

When the route map matches voice traffic will assign as next hop IP the Voice link and if matches Video traffic will set the next hop ip of the video link.

Hope that helps!

Vasilis