Catching up ... In draft-bl-nvo3-dataplane-requirements-00.txt, the last paragraph in Section 3.3.1.2. Service QoS identifier says:
Support for NVE Service CoS SHOULD be provided through a QoS field, inside the NVO3 overlay header. Examples of service CoS provided part of the service tag are 802.1p and DE bits in the VLAN and PBB ISID tags and MPLS EXP bits in the VPN labels. Why "inside the NVO3 overlay header"? Earlier in the section, IP DSCP and Ethernet 802.1p are mentioned as examples of CoS (Class of Service) indicators and QoS fields - when used between NVEs, these (obviously) belong in the outer IP and outer Ethernet headers respectively. What's the rationale for an additional QoS field in the overlay header? Thanks, --David ---------------------------------------------------- David L. Black, Distinguished Engineer EMC Corporation, 176 South St., Hopkinton, MA 01748 +1 (508) 293-7953 FAX: +1 (508) 293-7786 [email protected] Mobile: +1 (978) 394-7754 ---------------------------------------------------- _______________________________________________ nvo3 mailing list [email protected] https://www.ietf.org/mailman/listinfo/nvo3
