nanog mailing list archives
MTU (was Re: ULA and RIR cost-recovery)
From: Alex Bligh <alex () alex org uk>
Date: Thu, 25 Nov 2004 14:05:25 +0000
--On 25 November 2004 13:16 +0000 Michael.Dillon () radianz com wrote:
In today's network, is there anyone left who uses 1500 byte MTUs in their core?
I expect there are quite a few networks who will give you workable end-to-end MTU's >1500 bytes, either because of the above or because of peering links. Given how pMTUd works, this speculation should be relatively easy to test (take end point on >1500 byte MTU, run traceroute with appropriate MTU to various points and see where fragmentation required comes back). Of course I'd have tried this myself before posting, except, urm, I can't find a single machine I have root on that I can get more than a hop or two from without running into 1500 byte (or less) MTU. I am guessing also that a recent netflow sample from a commercial core (not Internet2), even with jumbo frames enabled, will show <0.01% of packets will not fit in 1500 byte MTU. Anyone have data? Alex
Current thread:
- Re: ULA and RIR cost-recovery, (continued)
- Re: ULA and RIR cost-recovery Owen DeLong (Nov 29)
- Re: ULA and RIR cost-recovery Leo Bicknell (Nov 29)
- Re: ULA and RIR cost-recovery Pekka Savola (Nov 29)
- Re: ULA and RIR cost-recovery Owen DeLong (Nov 29)
- Re: ULA and RIR cost-recovery Pekka Savola (Nov 29)
- Re: ULA and RIR cost-recovery Owen DeLong (Nov 30)
- Re: ULA and RIR cost-recovery Crist Clark (Nov 24)
- Re: ULA and RIR cost-recovery Owen DeLong (Nov 24)
- Re: ULA and RIR cost-recovery Daniel Senie (Nov 24)
- Re: ULA and RIR cost-recovery Michael . Dillon (Nov 25)
- MTU (was Re: ULA and RIR cost-recovery) Alex Bligh (Nov 25)
- Re: MTU (was Re: ULA and RIR cost-recovery) Bill Owens (Nov 25)
- Re: ULA and RIR cost-recovery Stephen Sprunk (Nov 25)
- Re: ULA and RIR cost-recovery Owen DeLong (Nov 26)
- Re: ULA and RIR cost-recovery Valdis . Kletnieks (Nov 24)
- Re: ULA and RIR cost-recovery Daniel Senie (Nov 24)
- Re: ULA and RIR cost-recovery Valdis . Kletnieks (Nov 25)
- Re: ULA and RIR cost-recovery Daniel Senie (Nov 26)
- Re: ULA and RIR cost-recovery Owen DeLong (Nov 26)
- Re: who gets a /32 [Re: IPV6 renumbering painless?] Iljitsch van Beijnum (Nov 20)
- Re: who gets a /32 [Re: IPV6 renumbering painless?] Stephen Sprunk (Nov 20)