nanog mailing list archives
Re: Why do some ISP's have bandwidth quotas?
From: "Tim Franklin" <tim () pelican org>
Date: Mon, 8 Oct 2007 13:32:44 +0100 (BST)
On Mon, October 8, 2007 1:06 pm, Roland Perry wrote:
Surely the incumbent doesn't impose a cost on the bandwidth along the local loop - the bottleneck (and cost per gigabyte) is the backhaul from their locally operated DSLAM to the ISP's own network.
If you're buying wholesale from the incumbent, it's effectively the same thing, as there's some kind of L2 connection per subscriber back to your own network, so no possibility to talk to other local subscribers without the hairpin. (At least, I've yet to see such a thing in the offering from any European incumbent. I guess you could in theory with a virtual-router or VRF per ISP on the incumbent's kit at the exchange, but that brings other problems when you want to do things beyond basic Internet, e.g. VPN or pseudowire services.) Unbundling does change the model - renting just the metal path from BT is not actually *that* horrific - but you then have to factor in your own kit in the exchange. That's not just cost, there's a big logistics piece - and a lot of processes to change if you've built your business around wholesale. Regards, Tim.
Current thread:
- Re: Why do some ISP's have bandwidth quotas?, (continued)
- Re: Why do some ISP's have bandwidth quotas? Taran Rampersad (Oct 04)
- Re: Why do some ISP's have bandwidth quotas? Mark Smith (Oct 04)
- Re: Why do some ISP's have bandwidth quotas? David E. Smith (Oct 04)
- Message not available
- Why do some ISP's have bandwidth quotas? Vassili Tchersky (Oct 04)
- Re: Why do some ISP's have bandwidth quotas? Roland Perry (Oct 06)
- RE: Why do some ISP's have bandwidth quotas? Steven Haigh (Oct 06)
- Re: Why do some ISP's have bandwidth quotas? Andy Davidson (Oct 08)
- Re: Why do some ISP's have bandwidth quotas? Roland Perry (Oct 08)
- Re: Why do some ISP's have bandwidth quotas? Andy Davidson (Oct 08)
- Re: Why do some ISP's have bandwidth quotas? Miquel van Smoorenburg (Oct 08)
- Message not available
- Re: Why do some ISP's have bandwidth quotas? Tim Franklin (Oct 08)
- Re: Why do some ISP's have bandwidth quotas? Tom Vest (Oct 04)
- Re: Why do some ISP's have bandwidth quotas? Joe Greco (Oct 04)
- Re: Why do some ISP's have bandwidth quotas? Joe Abley (Oct 04)
- Re: Why do some ISP's have bandwidth quotas? Joe Greco (Oct 04)
- Re: Why do some ISP's have bandwidth quotas? Adrian Chadd (Oct 04)
- RE: Why do some ISP's have bandwidth quotas? michael.dillon (Oct 05)
- Re: Why do some ISP's have bandwidth quotas? Adrian Chadd (Oct 05)
- Re: Why do some ISP's have bandwidth quotas? Ron da Silva (Oct 05)