> On Jul 9, 2019, at 9:19 AM, Mark Tinka <mark.ti...@seacom.mu> wrote: > > > >> On 9/Jul/19 16:18, Ross Tajvar wrote: >> I think the difficulty lies in appropriately marking the traffic. Like >> Joe said, the IPs are always changing. > > Does anyone know if they are reasonably static in an Express Route scenario? > > Mark.
Yes, the IPs used on the ExpressRoute connection are whatever is chosen for the internal IP scheme of the VPC. ExpressRoute is a VPN connection into that internal side of a VPC. On our carrier (MegaPort), ExpressRoute looks similar to an Option A NNI connection. BGP is used for routing. The source IPs on packets crossing out of the VPC onto the Azure-provided Internet may or may not be static, but internally they are usually static RFC 1918 addresses. We’ve been using ExpressRoute for our own office systems and a small handful of customers for about two years now. However, we don’t use diffserv on ExpressRoute, so can’t comment on that. -Brian