> 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.


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