nanog mailing list archives
Re: Anycast 101
From: William Allen Simpson <wsimpson () greendragon com>
Date: Fri, 17 Dec 2004 09:41:57 -0500
Iljitsch van Beijnum wrote:
Well, there may be only three "at" the LINX, but from where I'm sitting, 7 are reachable over the AMS-IX, 4 over ISP #1 and 1 over ISPs #2 and #3, respectively.Interestingly enough, b, c, d and f all share this hop: 6 portch1.core01.ams03.atlas.cogentco.com (195.69.144.124) (195.69.144.0/23 is the AMS-IX exchange subnet.)
I'm beginning to wonder whether you're just an agent provocateur. Assuming that your link to AMS-IX fails, your redundant attachments to the world will provide the reachability to those same 7 via your other links. All that shows is those 7 are topologically closer via that path. You don't seem to have 13 paths. So? FWIW, I see all DNS roots via the same BellSouth path. IFF BellSouth fails, I'm sure that other paths will pick up the slack. I'm not worried, because I've experienced BellSouth failures in the past, and I've tested dropping each of my links from time to time to ensure that routing works and I'm getting what I'm paying for.... Do you actually do any engineering, or just kibitzing? -- William Allen Simpson Key fingerprint = 17 40 5E 67 15 6F 31 26 DD 0D B9 9B 6A 15 2C 32
Current thread:
- Re: Anycast 101, (continued)
- Re: Anycast 101 William Allen Simpson (Dec 17)
- Re: Anycast 101 Iljitsch van Beijnum (Dec 17)
- Re: Anycast 101 William Allen Simpson (Dec 17)
- Re: Anycast 101 Steve Gibbard (Dec 17)
- Re: Anycast 101 Iljitsch van Beijnum (Dec 17)
- Re: Anycast 101 Joe Abley (Dec 17)
- Re: Anycast 101 Joe Shen (Dec 20)
- Re: Anycast 101 Iljitsch van Beijnum (Dec 17)
- Re: Anycast 101 William Allen Simpson (Dec 17)
- Re: Anycast 101 Iljitsch van Beijnum (Dec 17)
- Re: Anycast 101 Paul Vixie (Dec 17)
- Re: Anycast 101 Iljitsch van Beijnum (Dec 17)
- Re: Anycast 101 William Allen Simpson (Dec 17)
- Re: Anycast 101 Paul Vixie (Dec 18)
- Re: Anycast 101 Iljitsch van Beijnum (Dec 20)
- Re: Anycast 101 Stephane Bortzmeyer (Dec 20)
- Re: Anycast 101 Paul Vixie (Dec 20)
- Re: Anycast 101 Iljitsch van Beijnum (Dec 21)