North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: QOS or more bandwidth
On Tue, 29 May 2001, Stephen J. Wilcox wrote: >> Although I generally agree, how does one keep QoS out >> of the core for CBR and jitter-sensitive applications? > > I would disagree and argue that your core needs to be > running top of the range routers with fat pipes with > spare bandwidth, for a large network if you run out of > CPU or bandwidth your routers will simply fall over. > > If you have sufficient bandwidth and your routers are > running smoothly then there is no use for QoS hence I > wouldnt use it (plus it will slow down the routing > process). QoS isn't just about queueing algorithms and transmit reordering. QoS-triggered path selection (a la MPLS-TE, PBR) can be an equally compelling motivation, if the network is built for differentiated services (which most aren't today, since a packet is a packet is a packet). This would make most sense in the core, of course. Pete.
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