Jason Gao wrote: > > > Jason Gao wrote: > > ... > > > --- IPv6 flow label assignment > > > > > > Transport layer may set a 'control' bit in the IPv6 Traffic Class octet of the initiating packet > > > during the setup phase of a connection. > > > > > > > > > > > > The edge router inspects the control bit. If it is set, the edge router can further inspect the > > > packet, and reserve resource as required by the piggybacked resource reservation header in the > > > transport layer packet, allocate and/or assign a flow label to the expected connection, put the flow > > > label in the flow label field of the initiating acknowledgement packet. > > > > No. There is no such usage of the traffic class octet. See RFC 2474. > > Also, only the source host of a packet may set the flow label. > > See draft-ietf-ipv6-flow-label-03.txt > > > > Brian > > > Well, both the draft and RFC 2474 are not the final standard. RFC 2474 is a Proposed Standard, which means that fundamental changes are extremely unlikely. The flow label draft is indeed still a draft, but there is very strong WG consensus that flow labels must be immutable. > And both the traffic class octet and the flow label field are subject to further discuss. If you are referring to the text in RFC 2460, the traffic class is definitively specified by RFC 2474. The flow label draft is intended to be definitive, as soon as it's agreed. Brian