nanog mailing list archives
Re: What DNS Is Not
From: Jack Bates <jbates () brightok net>
Date: Mon, 16 Nov 2009 22:11:09 -0600
Glen Turner wrote:
It depends what you mean by "appropriate". It may not be "least cost" or "closest", and that can be a rude shock when the CDN traffic suddenly costs you A$5/GB (delivered from the US by undersea cable) rather than $0 (delivered from an in-country peer).
In some cases this may be true. However, many of the CDN's I've talked to will happily update which POP my network talks to. Is automatic detection perfect? Probably not. That is why they support manual correction. Their goal is to get you the best connectivity, and they usually don't have a problem, in my experience, working with a provider to ensure the right IP ranges go to the best POP.
> DNS is the wrong answer, simply because there's no way for the user to > express *their* policy. But since there no CDN support in HTTP..... >See above. It appears I have no problem expressing my policy to CDN's. Corporate world often uses views to express external and internal policy. Unfortunately, it's not that easy for the CDN, so they do the best that they can, and they correct when it's important enough for a provider to say "hey, this pop isn't the best for my network!"
Jack
Current thread:
- Re: What DNS Is Not, (continued)
- Re: What DNS Is Not Edward Lewis (Nov 09)
- Re: What DNS Is Not Patrick W. Gilmore (Nov 09)
- Re: What DNS Is Not Jorge Amodio (Nov 09)
- Re: What DNS Is Not Martin Hannigan (Nov 09)
- Re: What DNS Is Not bmanning (Nov 09)
- Re: What DNS Is Not Jorge Amodio (Nov 08)
- Re: What DNS Is Not Glen Turner (Nov 16)
- Re: What DNS Is Not Brandon Galbraith (Nov 16)
- Re: What DNS Is Not Jack Bates (Nov 16)
- Re: What DNS Is Not Andrew Cox (Nov 19)
- Re: What DNS Is Not Randy Bush (Nov 19)
- Re: What DNS Is Not Matthew Palmer (Nov 20)
- Re: What DNS Is Not Eduardo A. Suárez (Nov 19)
- Re: What DNS Is Not Mark Andrews (Nov 19)
- Re: What DNS Is Not Jorge Amodio (Nov 19)
- Re: What DNS Is Not Jorge Amodio (Nov 25)
- Re: What DNS Is Not Mark Andrews (Nov 25)
- Re: What DNS Is Not Dan White (Nov 25)