nanog mailing list archives
Re: MTU path discovery and IPSec
From: Valdis.Kletnieks () vt edu
Date: Thu, 04 Dec 2003 18:50:02 -0500
On Thu, 04 Dec 2003 18:03:38 EST, Barney Wolff said:
That's not how PMTUD works. If DF is set, you discard the packet and report back with ICMP. If DF is not set, you frag the packet - but that's not PMTUD, because no report ever goes back to the sender.
Oh, so we compute ONE number if DF is set, saying what number we think they should use - but if DF *isn't* set, we use a different number. Sounds like more complicated code that's just there so it can sink its teeth into the rump of the first banana-eating NOC dweller that has to figure out what's wrong.... Unless of course there's a *reason* we want it different? Though it escapes me what it might be....
Attachment:
_bin
Description:
Current thread:
- Firewall stateful handling of ICMP packets, (continued)
- Firewall stateful handling of ICMP packets Sean Donelan (Dec 03)
- Re: Firewall stateful handling of ICMP packets Owen DeLong (Dec 03)
- Re: Firewall stateful handling of ICMP packets Valdis . Kletnieks (Dec 03)
- Re: Firewall stateful handling of ICMP packets Owen DeLong (Dec 03)
- Re: Firewall stateful handling of ICMP packets Henry Linneweh (Dec 03)
- Re: MTU path discovery and IPSec Tony Rall (Dec 04)
- Re: MTU path discovery and IPSec Joe Maimon (Dec 04)
- Re: MTU path discovery and IPSec Valdis . Kletnieks (Dec 04)
- Re: MTU path discovery and IPSec Barney Wolff (Dec 04)
- Re: MTU path discovery and IPSec Joe Maimon (Dec 04)
- Re: MTU path discovery and IPSec Valdis . Kletnieks (Dec 04)
- Re: MTU path discovery and IPSec Joe Maimon (Dec 04)
- Re: MTU path discovery and IPSec Crist Clark (Dec 04)
- Re: MTU path discovery and IPSec Joe Maimon (Dec 04)
- Re: MTU path discovery and IPSec Laurence F. Sheldon, Jr. (Dec 04)
- Re: MTU path discovery and IPSec Joe Maimon (Dec 04)
- Re: MTU path discovery and IPSec Valdis . Kletnieks (Dec 04)
- Re: MTU path discovery and IPSec Joe Maimon (Dec 10)
- Re: MTU path discovery and IPSec Barney Wolff (Dec 10)