MPLS VPN over mGRE - QoS?

[alasdairmcwilliam]

Hi,

I've been looking at MPLS VPN over mGRE as a really neat "MPLS-lite" solution to the problem of routing segregation across a third party IP core without having to deploy a mesh of point to point GRE tunnels running LDP and "real" MPLS.

For reference, details are at http://www.cisco.com/en/US/docs/ios/interface/configuration/guide/ir_mplsvpnomgre.html

My problem is that I don't see how I can intelligently deploy QoS on this. For example, if an IP packet comes into my PE with AF41, I need my outgoing GRE packet to have AF41 so the third party IP core will adhere to that marking.

Does anyone have any ideas?

Cheers

Alasdair

[gatlin007]

QoS pre-classify

http://cio.cisco.com/en/US/tech/tk543/tk545/technologies_tech_note09186a008017405e.shtml

[alasdairmcwilliam]

I looked at preclassify but with the l3vpn encapsulation profile mechanism tied to a BGP route-map, the tunnel interfaces are automatically created and you cannot modify them.

r2(config)#int tu0
% This interface cannot be modified

:-(