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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: QoS/CoS in the real world?
On Mon, 8 Jul 2002, Stephen J. Wilcox wrote: > > Hi all, > I've been looking through the various qos/cos options available, my particular > area was in how IP (MPLS perhaps) compares and can be a substitute for ATM. > > Well, theres lots of talk and hype out there, from simple IP queuing eg cisco > priority queuing, rsvp, diffserv, mpls traffic engineering etc > > But two things are bugging me.. > > 1. To what extent have providers implemented QoS for their customers I was providing this as a service so my customers at Exario. We 2 G.726 VoIP channels and data over one PVC on a 192kbps DSL link. I developed patent pending process to make that happen. Priority based queuing was required for VoIP traffic, but because of starvation selected WFQ for the 3 data queues. The scheduler had to be smart enough to fill the space between voice samples with fragmented data based on the MTU of the link so as to keep jitter down. > 2. Hype aside, to what extent do customers actually want this (and by this I > dont just mean that they want the latest QoS because its the 'latest thing', > there has to be a genuine reason for them to want it). And this takes me back to > my ATM reference where there is a clear major market still out there of ATM > users and what would it take to migrate them to an IP solution? Well every customer that used voice had to have QoS if they also wanted data, but we also were able to sell data QoS to customers. We could prioritize credit card transactions, or bulk ftp transfers or any application that wanted based on IP or port. > Also, how are people implementing bandwidth on demand (dynamic allocation > controlled by the customer) solutions to customers Because my last mile aggregation was DSL or T1 everything was frame or ATM based so I decided to stick with a ATM core. We setup PVCs on our ATM switches based on what customers wanted and built back office systems to change bandwidth based on customer requirements. ><> Nathan Stratton nathan at robotics.net http://www.robotics.net > Cheers > > Steve
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