nanog mailing list archives
RE: IP tunnel MTU
From: "Templin, Fred L" <Fred.L.Templin () boeing com>
Date: Mon, 29 Oct 2012 16:02:33 -0700
Hi Bill,
Maybe something as simple as clearing the don't fragment flag and adding a TCP option to report receipt of a fragmented packet along with the fragment sizes back to the sender so he can adjust his mss to avoid fragmentation.
That is in fact what SEAL is doing, but there is no guarantee that the size of the largest fragment is going to be an accurate reflection of the true path MTU. RFC1812 made sure of that when it more or less gave IPv4 routers permission to fragment packets pretty much any way they want. Thanks - Fred fred.l.templin () boeing com
Current thread:
- Re: Please, talk me down., (continued)
- Re: Please, talk me down. Mark Andrews (Oct 21)
- forward and reverse DNS (was: Please, talk me down.) Andrew Sullivan (Oct 22)
- IP tunnel MTU Templin, Fred L (Oct 22)
- Re: IP tunnel MTU Dobbins, Roland (Oct 22)
- RE: IP tunnel MTU Templin, Fred L (Oct 23)
- Re: IP tunnel MTU Ray Soucy (Oct 29)
- RE: IP tunnel MTU Templin, Fred L (Oct 29)
- Re: IP tunnel MTU Ray Soucy (Oct 29)
- Re: IP tunnel MTU Shahab Vahabzadeh (Oct 29)
- Re: IP tunnel MTU William Herrin (Oct 29)
- RE: IP tunnel MTU Templin, Fred L (Oct 29)
- Re: IP tunnel MTU Chris Woodfield (Oct 29)
- RE: IP tunnel MTU Templin, Fred L (Oct 30)
- Re: IP tunnel MTU Joe Maimon (Oct 29)
- Re: IP tunnel MTU Jared Mauch (Oct 29)
- Re: IP tunnel MTU Tim Durack (Oct 29)
- Re: IP tunnel MTU Tim Franklin (Oct 30)
- Re: IP tunnel MTU Sander Steffann (Oct 30)
- Re: IP tunnel MTU Jeroen Massar (Oct 30)
- Re: IP tunnel MTU Joe Maimon (Oct 29)
- Re: IP tunnel MTU Jared Mauch (Oct 29)