> 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. And both the traffic class octet and the flow label field are subject to further discuss. So I didn't mean to prove fuzzy-layering by the fields in IPv6 but instead tried to make some suggestions for the development of IPv6 in the QoS domain, according to the fuzzy-layering practices. Anyway, thanks for the comment! Jason