nanog mailing list archives
Re: The Qos PipeDream [Was: RE: Two Tiered Internet]
From: Michael.Dillon () btradianz com
Date: Fri, 16 Dec 2005 09:29:29 +0000
most large networks (as was said a few times I think) don't really need
it
in their cores. I think I've seen a nice presentation regarding the queuing delay induced on 'large pipe' networks, basically showing that
qos
is pointless if your links are +ds3 and not 100% full. Someone might
have
a pointer handy for that?
Here in London, we have noticed that the double-length bendy buses have a harder time moving through city streets than motor scooters do. I suspect that the studies you are referring to show that the key factor is the ratio between the size of pipe and the size of the flows moving through that pipe.
diffserv is the devil... and I think the voip product(s) in question aren't meant to be used in places where bandwidth is the constraint :)
A single VoIP call is a rather slim volume of packets compared to many other uses of the Internet. If a network doesn't have systemic jitter caused by layer 2 congestion, then one would expect VoIP to work fine on a modern network. Indeed, that is what Bill Woodcock reported a year or so ago in regard to INOC-DBA. --Michael Dillon
Current thread:
- Re: The Qos PipeDream [Was: RE: Two Tiered Internet], (continued)
- Re: The Qos PipeDream [Was: RE: Two Tiered Internet] Christopher L. Morrow (Dec 15)
- Re: The Qos PipeDream [Was: RE: Two Tiered Internet] Mikael Abrahamsson (Dec 16)
- Re: The Qos PipeDream [Was: RE: Two Tiered Internet] Stephen Sprunk (Dec 16)
- Re: The Qos PipeDream [Was: RE: Two Tiered Internet] Mikael Abrahamsson (Dec 16)
- Message not available
- Re: The Qos PipeDream [Was: RE: Two Tiered Internet] David Meyer (Dec 15)
- Re: The Qos PipeDream [Was: RE: Two Tiered Internet] Marshall Eubanks (Dec 15)
- Re: The Qos PipeDream [Was: RE: Two Tiered Internet] Christopher L. Morrow (Dec 15)
- Re: The Qos PipeDream [Was: RE: Two Tiered Internet] David Meyer (Dec 15)
- Re: The Qos PipeDream [Was: RE: Two Tiered Internet] Christopher L. Morrow (Dec 15)
- Re: The Qos PipeDream [Was: RE: Two Tiered Internet] Mark Smith (Dec 16)
- Re: The Qos PipeDream [Was: RE: Two Tiered Internet] Michael . Dillon (Dec 16)
- Re: The Qos PipeDream [Was: RE: Two Tiered Internet] Chris Woodfield (Dec 18)
- Re: The Qos PipeDream [Was: RE: Two Tiered Internet] Joe Maimon (Dec 18)
- Re: The Qos PipeDream [Was: RE: Two Tiered Internet] Jay Hennigan (Dec 18)
- Re: The Qos PipeDream [Was: RE: Two Tiered Internet] Joe Maimon (Dec 18)
- Re: The Qos PipeDream [Was: RE: Two Tiered Internet] Mikael Abrahamsson (Dec 18)
- Re: The Qos PipeDream [Was: RE: Two Tiered Internet] Joe Maimon (Dec 18)
- Re: The Qos PipeDream [Was: RE: Two Tiered Internet] tony sarendal (Dec 18)
- Message not available
- RE: The Qos PipeDream [Was: RE: Two Tiered Internet] Christopher L. Morrow (Dec 16)
- Re: The Qos PipeDream [Was: RE: Two Tiered Internet] Stephen Sprunk (Dec 16)
- RE: The Qos PipeDream [Was: RE: Two Tiered Internet] Sean Donelan (Dec 16)