MPLS VPN over mGRE - QoS?

Unanswered Question
Oct 1st, 2010


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

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?



I have this problem too.
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alasdairmcwilliam Fri, 10/01/2010 - 09:15

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.

/* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;}

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



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