Cell Relay Archive[Date Prev][Date Next][Thread Prev][Thread Next] [Date Index][Thread Index][Author Index][Subject Index] Re: RFI: QoS-aware IP over ATM sublayer and API?
Stu Card wrote: > > After slogging through material on CLIP, MARS, LANE, NHRP, MPOA, RSVP, > etc., I still have the question with which I started: > > has anyone defined a way to do QoS-aware IP over ATM? > i've been wondering about this myself. i mean, ostensibly one way to do this would be to have the higher layer protocol include information which is dependent upon the underlying network infrastructure. thus, the application would have to know that it was going to send traffic over an atm network and include pci that would allow an atm vcc to be set up according to the needs of the application. this, however, is an apparent violation of the osi protocol reference model which seeks isolation among the functions of the model. the alternative, then, would be to modify the whole protocol stack so that you stay consistent with the osi prm. hmmm, violating that prm sounds like a better idea... you can find a good example of this approach by looking at the appendices of the h.323 specification that describes h.323 over atm. the basic idea is that messages carried over the h.245 control channel are to include information that includes parameters needed in the atm setup message. __ ______ __ / __/ | lucent technologies, naperville il, usa _/ (_(_) / (_(_/_/_(_/ . ronald.h.davis@lucent.com "if you ain't the lead dog, the scenery never changes" -- edmund wilson |
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