Extreme congestion (was Re: inter-domain link recovery)

Alexander Harrowell a.harrowell at gmail.com
Fri Aug 17 09:24:31 UTC 2007

On 8/17/07, Adrian Chadd <adrian at creative.net.au> wrote:
> On Thu, Aug 16, 2007, michael.dillon at bt.com wrote:
> > > I'm pushing an agenda in the open source world to add
> > > some concept of locality, with the purpose of moving traffic off ISP
> > > networks when I can. I think the user will be just as happy or
> > > happier, and folks pushing large optics will certainly be.

This is badly needed in my humble opinion;  regarding the wireless LAN case
described, it's true that this behaviour would be technically suboptimal,
but interestingly the real reason for implementing it would be maintained -
economics. After all, the network operator (the owner of the wireless LAN)
isn't consuming any more upstream as a result.

> > When you hear stories like the Icelandic ISP who discovered that P2P was
> > 80% of their submarine bandwidth and promptly implemented P2P
> > throttling, I think that the open source P2P will be driven to it by
> > their user demand.

Yes. An important factor in future design will be "network

.. or we could start talking about how Australian ISPs are madly throttling
> P2P traffic. Not just because of its impact on international trunks,
> but their POP/wholesale DSL infrastructure method just makes P2P even
> between clients on the same ISP mostly horrible.

Similar to the pre-LLU, BT IPStream ops in the UK. Charging flat rates to
customers and paying per-bit to wholesalers is an obvious economic problem;
possibly even more expensive to localise the p2p traffic, if the price of
wholesale access bits is greater than peering/transit ones!
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