On Thu, Nov 13, 2014 at 2:02 PM, Dino Farinacci <[email protected]> wrote: > On Thu, Nov 13, 2014 at 12:06 AM, Dino Farinacci <[email protected]> wrote: >>>> Specifically, one could imagine the NVE copying the IP1 DSCP codepoint >>>> into the IP2 header. Alternatively one could >>> >>> Exactly. Thanks Benson. >> >> Dino, yes, but this requires DPI at the NVE, as we already talked > > No it doesn't. > >> about in the draft as well as configuration to use diffserv. >> RFC7348 does not mention any requirement for NVE to look beyond Inner >> Ethernet Header into the Original Ethernet Payload in order to make >> its encapsulation. > > This is very simple. Let me sequence the steps on the encapsulator as well as > the decapsultor: > > (1) A 802.1Q frame arrives at an encapsulator. > (2) The encapsulator will encapsulate the frame with an outer IP header. It > copies the EXP bits from the frame to the outer IP header TOS bits. > (3) The decapsulator receives the IP packet, it strips the outer IP header > and DOESNOT copy the TOS bits to the EXP bits of the frame because the TOS > field could have been changed in transit. The EXP bits, set by the > originating source are perserved. >
Sorry there are no EXP bits mentioned in RFC 7348. MPLS is out of scope. EXP is 3 bits long, DSCP is 6 bits and dividing it into two 3 bit pieces, I am not sure if David will like it. See also Brian Carpenter's comments. Regards, Behcet > Dino > >> >> Regards, >> >> Behcet >> >>> >>> Dino > _______________________________________________ nvo3 mailing list [email protected] https://www.ietf.org/mailman/listinfo/nvo3
