nanog mailing list archives
RE: Important New Requirement for IPv4 Requests
From: Justin Horstman <jhorstman () adknowledge com>
Date: Thu, 30 Apr 2009 10:25:06 -0500
Default MSS for most linux is 0, which causes the kernel to calculate it as the interface MTU-40bytes. You can either change the MTU on the interface or more specifically use the 'ip route <ipblock> dev <interface> advmss <new mss>' command to update it on a per route basis. ~J -----Original Message----- From: Robert E. Seastrom [mailto:rs () seastrom com] Sent: Thursday, April 30, 2009 7:12 AM To: Randy Bush Cc: nanog () nanog org Subject: Re: Important New Requirement for IPv4 Requests Randy Bush <randy () psg com> writes:
mtu clue is also useful. here on tokyo b-flets, and i would guess in many other ppoe environments, you need to tune or lose big-time.
But not difficult to beneficially MiM: in pf: scrub in on gre0 max-mss 1400 scrub out on gre0 max-mss 1400 in cisco-land: ip tcp adjust-mss 1400 i'm sure the linux folks can offer up something similar... -r
Current thread:
- Re: Important New Requirement for IPv4 Requests, (continued)
- Re: Important New Requirement for IPv4 Requests Joe Greco (Apr 22)
- Re: Important New Requirement for IPv4 Requests Karl Auer (Apr 22)
- Re: Important New Requirement for IPv4 Requests Joe Abley (Apr 22)
- Re: Important New Requirement for IPv4 Requests Nathan Ward (Apr 22)
- Re: Important New Requirement for IPv4 Requests Jo Rhett (Apr 23)
- Re: Important New Requirement for IPv4 Requests Jo Rhett (Apr 23)
- Re: Important New Requirement for IPv4 Requests Perry Lorier (Apr 24)
- Re: Important New Requirement for IPv4 Requests Kevin Oberman (Apr 24)
- Re: Important New Requirement for IPv4 Requests Randy Bush (Apr 24)
- Re: Important New Requirement for IPv4 Requests Robert E. Seastrom (Apr 30)
- RE: Important New Requirement for IPv4 Requests Justin Horstman (Apr 30)
- Re: Important New Requirement for IPv4 Requests Jon Lewis (Apr 21)
- Re: Important New Requirement for IPv4 Requests Jo Rhett (Apr 21)
- Re: Important New Requirement for IPv4 Requests Matthew Palmer (Apr 21)
- Re: Important New Requirement for IPv4 Requests Jo Rhett (Apr 23)
- Re: Important New Requirement for IPv4 Requests Kevin Oberman (Apr 24)