nanog mailing list archives
Re: PMTU-D: remember, your load balancer is broken
From: Marc Slemko <marcs () znep com>
Date: Thu, 15 Jun 2000 21:54:58 -0700 (PDT)
On Thu, 15 Jun 2000, Greg A. Woods wrote:
So, how about it everyone? Can we please all disable PMTU everywhere
I assume you Mean PMTU-D, not PMTU.
and try just increasing our default MSS where necessary? I.e. even if you're using a load balancer or not? Pretty please? The extra fragmentation is only going to be a problem for those people who live behind tunnels of one sort or another. I certainly don't mind paying for a bit of extra fragmentation in order to use my low-cost high-bandwidth tunnel!
NO! If PMTU-D is causing problems, then get whoever has a broken network to fix it. Is it always practical? Of course not. But education is the key. PMTU-D is not the problem here, and it is very shortsighted to say "oh, we just know better and can manually tune things to work well". That is not a wise "solution". If even 5% of people are in a situation where broken networks cause PMTU-D to not work, then such broken networks will be fixed, period. If you want to work around it on your systems, then lower your MTUs. But the solution is not for everyone to go disable PMTU-D because there are some broken networks; after all, the people that would listen to disable it are the same people who would just fix their broken networks. And in 99% of the cases, the broken network will be at their end or at the user's end, it will very seldom be in some network in the middle providing transit.
Current thread:
- Re: PMTU-D: remember, your load balancer is broken, (continued)
- Re: PMTU-D: remember, your load balancer is broken Valdis . Kletnieks (Jun 17)
- Re: PMTU-D: remember, your load balancer is broken Bora Akyol (Jun 18)
- Re: PMTU-D: remember, your load balancer is broken Paul Vixie (Jun 19)
- Re: PMTU-D: remember, your load balancer is broken Bennett Todd (Jun 14)
- Re: PMTU-D: remember, your load balancer is broken Ryan O`Connell (Jun 14)
- Re: PMTU-D: remember, your load balancer is broken Valdis . Kletnieks (Jun 13)
- Re: PMTU-D: remember, your load balancer is broken Brett Frankenberger (Jun 14)
- Re: PMTU-D: remember, your load balancer is broken Greg A. Woods (Jun 15)
- Re: PMTU-D: remember, your load balancer is broken Greg A. Woods (Jun 15)
- Re: PMTU-D: remember, your load balancer is broken Marc Slemko (Jun 15)
- Re: PMTU-D: remember, your load balancer is broken Greg A. Woods (Jun 15)
- Re: PMTU-D: remember, your load balancer is broken Stephen Sprunk (Jun 14)
- Re: PMTU-D: remember, your load balancer is broken Andrew Brown (Jun 14)
- Re: PMTU-D: remember, your load balancer is broken Valdis . Kletnieks (Jun 15)
- OT: PMTU-D and Chickens Rural CNE (Jun 15)