nanog mailing list archives
Re: Anycast 101
From: Paul Vixie <vixie () vix com>
Date: 17 Dec 2004 21:58:32 +0000
as i said the other day, "all power tools can kill." if you turn on PPLB and it hurts, then turn it off until you can read the manual or take a class or talk to an expert. PPLB is a link bundling technology. if you turn it on in non-parallel-path situation, it will hurt you, so, "don't do that."Yes, per packet load balancing will cause reordering, and if that's an issue you shouldn't use it. But if with pplb packets end up at two different hosts, that's not the fault of the people who invented per packet load balancing or the people who turned it on, but the fault of the people giving the same address to two different hosts.
since i already know that Iljitsch isn't listening, i'm not interested in debating him further. i would be interested in hearing from anybody else who thinks that turning on pplb in a eyeball-centric isp that has multiple upstream paths is a reasonable thing to do, even if there were no anycast services deployed anywhere in the world. at the moment i am completely certain that turning on pplb would be an irrational act, and would have a significant performance-dooming effect on a client population behind it, and that the times when pplb would actually be useful and helpful are very limited, and that anycast doesn't even enter into the reasons why doing as Iljitsch paints would be a bad idea. but my mind is open, if anyone can speak from experience on the matter. -- Paul Vixie
Current thread:
- Re: Anycast 101, (continued)
- Re: Anycast 101 Steve Gibbard (Dec 17)
- Re: Anycast 101 Joe Shen (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 Stephane Bortzmeyer (Dec 17)
- 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 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)
- Message not available
- Re: Anycast 101 Christopher L. Morrow (Dec 21)
- Re: Anycast 101 Iljitsch van Beijnum (Dec 17)
- Re: Anycast 101 Joe Shen (Dec 20)
- Re: Anycast 101 bmanning (Dec 20)