Adding extra network routes to XenServer guests needs to be supported
Extra routes need to be added for private interfaces to be able to reach all other private networks within the same region
Extra routes need to be added to reach services (swift, for example) via private interfaces as well.
as melange supports routes, i've updated nova to make use of them in a current branch of mine up for review:
We need to discuss if this feature is necessary for nova classic networking.
* Blueprints in grey have been implemented.