Re: sysctl options for Maximum segment size

[Rémi Guyomarch <rguyom@pobox.com>]

On Thu, Nov 30, 2000 at 10:53:16AM -0500, kfl wrote:

> Just for curiosity, does anyone know why the MSS is set to 512 in
> OpenBSD while it's 1460 (ethernet) in FreeBSD?

1) Never post in HTML. Most of people will simply ignore you, while
some can go into balistic mode.

2) OpenBSD 2.7 doesn't have PMTU discovery, I believe 512 is just low
enough to cross most routers without getting into MTU
problems. OpenBSD 2.8 have PMTU discovery, but maybe the default
didn't get changed.

3) The default MSS in FreeBSD and the maximum frame size on ethernet
is 1500, not 1460 (1514 if you add ethernet headers).

-- 
Rémi