This disclosure describes methods, devices, and systems related to routing packets over enterprise network sites. A method may be disclosed for routing packets between hosts at a first site and hosts at a second site in a network using a firewall. The method may comprise receiving a request, in a first packet, from a first router to send one or more packets to two or more hosts at the second site. The method may comprise receiving a first sub-network prefix, in a route advertisement, corresponding to two or more hosts at the first site from the first router, and receiving a first community value, in a first advertisement, associated with the first sub-network prefix. The method may comprise generating a first local preference value based at least in part on the first community value. And the method may comprise sending the request, first sub-network prefix, and first local preference value to a second router, in a second advertisement.