nanog mailing list archives
Re: GLBX ICMP rate limiting (was RE: Tier-1 without their own backbone?)
From: Paul Vixie <vixie () vix com>
Date: 28 Aug 2003 17:48:33 +0000
Along these lines, how does this limiting affect akamai or other 'ping for distance' type localization services? I'd think their data would get somewhat skewed, right?
using icmp to predict tcp performance has always been a silly idea; it doesn't take any icmp rate limit policy changes to make it silly. other silly ways to try to predict tcp performance include aspath length comparisons, stupid dns tricks, or geographic distance comparisons. the only reliable way to know what tcp will do is execute it. not just the syn/synack as in some blast protocols i know of, but the whole session. and the predictive value of the information you'll gain from this decays rather quickly unless you have a lot of it for trending/aggregation. "gee, ping was faster to A but tcp was faster to B, do you s'pose there could be a satellite link, or a 9600 baud modem, in the system somewhere?" -- Paul Vixie
Current thread:
- Re: Tier-1 without their own backbone?, (continued)
- Re: Tier-1 without their own backbone? John Palmer (Aug 27)
- Re: Tier-1 without their own backbone? Larry Rosenman (Aug 27)
- Re: Tier-1 without their own backbone? Will Yardley (Aug 27)
- RE: Tier-1 without their own backbone? jlewis (Aug 27)
- GLBX ICMP rate limiting (was RE: Tier-1 without their own backbone?) variable (Aug 28)
- Re: GLBX ICMP rate limiting (was RE: Tier-1 without their own backbone?) Jared Mauch (Aug 28)
- Re: GLBX ICMP rate limiting (was RE: Tier-1 without their own backbone?) Wayne E. Bouchard (Aug 28)
- Re: GLBX ICMP rate limiting (was RE: Tier-1 without their own backbone?) Christopher L. Morrow (Aug 28)
- Re: GLBX ICMP rate limiting (was RE: Tier-1 without their own backbone?) Jared Mauch (Aug 28)
- Re: GLBX ICMP rate limiting (was RE: Tier-1 without their own backbone?) Robert Boyle (Aug 28)
- Re: GLBX ICMP rate limiting (was RE: Tier-1 without their own backbone?) Paul Vixie (Aug 28)
- Re: Tier-1 without their own backbone? John Palmer (Aug 27)
- Re: GLBX ICMP rate limiting (was RE: Tier-1 without their own backbone?) Alex Rubenstein (Aug 28)
- Message not available
- Re: GLBX ICMP rate limiting (was RE: Tier-1 without their own backbone?) Robert Boyle (Aug 28)
- Re: GLBX ICMP rate limiting (was RE: Tier-1 without their own backbone?) Steve Carter (Aug 28)
- ICMP traffic increasing on most backbones Re: GLBX ICMP rate limiting Sean Donelan (Aug 28)
- Re: ICMP traffic increasing on most backbones Re: GLBX ICMP rate limiting Steve Carter (Aug 28)
- Re: ICMP traffic increasing on most backbones Re: GLBX ICMP rate limiting Rachael Treu (Aug 28)
- Re: ICMP traffic increasing on most backbones Re: GLBX ICMP rate limiting Dan Hollis (Aug 28)
- Dealing with infected users (Re: ICMP traffic increasing on most backbones Re: GLBX ICMP rate limiting Mike Tancsa (Aug 28)
- Re: Dealing with infected users (Re: ICMP traffic increasing on most backbones Re: GLBX ICMP rate limiting Dan Hollis (Aug 28)
- Re: Dealing with infected users (Re: ICMP traffic increasing on most backbones Re: GLBX ICMP rate limiting Mike Tancsa (Aug 28)