On 15/04/2008, Gareth Davis <[EMAIL PROTECTED]> wrote: > > Brian, > It has been pointed out several times now that the problem is between the > home user and the ISP, not the ISP and the BBC/Akamai. Although it might > appear from a traceroute that there is nothing between your home router and > your ISP - there is, but the IP traffic is encapsulated and passed within > BTs ATM cloud so you cannot see it. It is the cost of moving the > encapsulated IP within this cloud between the home user and the ISP where > the problem is. >
One does not depend upon traceroute for anything in these situations... you never learn anything to your advantage. Once again it is a great shame that we ended up with this deformed IP network, if the model had been constructed in a truly competitive market, as with the US, this problem would not have arisen. No amount of caching or proxying at the ISP end will help, because it > is outside the ATM cloud. If any caching were to be effective it would have > to work inside the cloud at exchange or regional level, and I'm not aware of > any technology that can read the ATM packets, decap the IP packets from > them, interpret the IP packets - then inject more packets with correctly > encapsulated and valid IP into the ATM cloud as a response. All this would > have to be at wire speed so as not to add latency to all connections passing > through the device. Without doing this, there is no where else to put the > proxy for it to be effective. > > Anyone who thinks they can do this, go and build it. You stand to make a > vast amount of money installing them in every exchange. > Putting the equipment in each exchange was, as I recall, was actually the conclusion of the report I wrote, all that time ago. And there is so much room in them as they were all built in the old Strouger days... -- > *Gareth Davis* | Production Systems Specialist > World Service Future Media, Digital Delivery Team - Part of BBC Global > News Division > 8 http://www.bbcworldservice.com/ + 702NE Bush House, Strand, London, WC2B > 4PH > > ------------------------------ > *From:* [EMAIL PROTECTED] [mailto: > [EMAIL PROTECTED] *On Behalf Of *Brian Butterworth > *Sent:* 15 April 2008 17:14 > *To:* backstage@lists.bbc.co.uk > *Subject:* Re: [backstage] iPlayer and the ISPs - a solution > > You are saying that the capacity on each individual ADSL line here is the > problem? I really don't see that. The STATED problem is PAYING for the > PIPES to backbone from BT. If this isn't the problem, then someone is > lying. > > > -- Please email me back if you need any more help. Brian Butterworth http://www.ukfree.tv
