Thought this might be a helpful place to figure out whether what I want to do is achievable!
At the moment, traffic destined from STH-1(AS1111) for 192.168.0.0 or 10.0.0.0 default travels via MDL-1(AS1111)->NTH-1(AS1111)->AS2222 (the red highlighted links), this works fine, however I want to try and load balance the traffic via the MDL-2->NTH-2 link as well. From what I've read regarding BGP Local Preference + route-maps this seems possible but I'm having difficulty getting my head around it? I've included another diagram below of what I want to happen
So as you can see looking at the red highlighted links, I'm trying to make traffic flow to 192.168.0.0 and 10.0.0.0 over both of the following paths to AS2222 (I want to avoid using the NTH-2->AS2222 link):
As I said this sounds doable via bgp local pref, I'm just having a hard time figuring getting it to work in my test lab. For me to achieve this would I need to say manually setup a higher local pref route map for 10.0.0.0 on MDL-2 so that traffic is sent to there instead (192.168.0.0 would continue to default via MDL-1->NTH-1 in that case?) and it should then go via NTH-2? Or am I making this to hard with bgp local pref involved?
Would love some opinions