nanog mailing list archives
Re: is this like a peering war somehow?
From: Michael.Dillon () btradianz com
Date: Fri, 20 Jan 2006 14:08:40 +0000
My guess would be that basically everybody doing triple play will prioritize the IPTV and VoIP packets in their network including the access. Considering that streaming UDP IPTV requires very very low
packet
loss, much better than Best Effort, this is needed to provide a good quality service.
This is preferential treatment for some packets and it makes perfect technological sense.
But it's no magic bullet. Streaming live media also requires low jitter, especially if you are selling it as TV because viewers will join and leave channels often, as they change channels on their remote controls. This means you can't have big local buffers to hide jitter, therefore you have to build a network with enough capacity so that packets are all cut-through switched. It's possible to hide packet loss from IPTV by throwing away some other application's packets but you can't hide jitter on your network. And if you have built such a good network that you don't have jitter, there is not going to be any packet loss either so QoS does nothing at all. Preferential treatment can degrade service, but it cannot improve service. If you prefer an IPTV service then you are degrading all other services. If a 3rd party measures the true quality of your service without using IPTV, then they will see a network with much worse performance than on a network which does not do preferential treatment. No magic bullets. And if you are spending the extra money to implement preferential treatment, can you be sure that there is a market willing to pay extra for this? --Michael Dillon
Current thread:
- is this like a peering war somehow? Paul Vixie (Jan 19)
- Re: is this like a peering war somehow? Alexander Harrowell (Jan 19)
- Re: is this like a peering war somehow? David Ulevitch (Jan 19)
- Re: is this like a peering war somehow? Sean Donelan (Jan 19)
- Re: is this like a peering war somehow? Daniel Golding (Jan 19)
- Re: is this like a peering war somehow? Edward B. DREGER (Jan 20)
- Re: is this like a peering war somehow? James (Jan 21)
- Re: is this like a peering war somehow? Edward B. DREGER (Jan 20)
- Re: is this like a peering war somehow? Per Heldal (Jan 20)
- Re: is this like a peering war somehow? Alexander Harrowell (Jan 20)
- Re: is this like a peering war somehow? Mikael Abrahamsson (Jan 20)
- Re: is this like a peering war somehow? Michael . Dillon (Jan 20)
- Re: is this like a peering war somehow? Peter Corlett (Jan 20)
- Re: is this like a peering war somehow? Patrick W. Gilmore (Jan 20)
- Re: is this like a peering war somehow? Alexander Harrowell (Jan 20)
- Re: is this like a peering war somehow? Petri Helenius (Jan 22)
- Re: is this like a peering war somehow? Mikael Abrahamsson (Jan 22)
- Re: is this like a peering war somehow? Todd Vierling (Jan 23)
- qos on access (Re: is this like a peering war somehow?) Mikael Abrahamsson (Jan 23)
- Re: is this like a peering war somehow? Alexander Harrowell (Jan 20)
- Re: is this like a peering war somehow? Paul Vixie (Jan 23)
- Re: is this like a peering war somehow? Per Heldal (Jan 20)
- Re: is this like a peering war somehow? Joe Abley (Jan 20)