Date: Tue, 2 Sep 2008 13:38:09 -0700 From: David Wolfskill <david@catwhisker.org> To: Charles Beckham <cbeckham@gmail.com> Cc: freebsd-hackers@freebsd.org Subject: Re: Obytes counter in netstat not incrementing Message-ID: <20080902203809.GK1089@bunrab.catwhisker.org> In-Reply-To: <f9ac6b770809021315x4b754a0bu81cfca9578c753bc@mail.gmail.com> References: <f9ac6b770808312346i61afe359y67a795715cede824@mail.gmail.com> <20080902154131.GH1089@bunrab.catwhisker.org> <f9ac6b770809021315x4b754a0bu81cfca9578c753bc@mail.gmail.com>
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On Tue, Sep 02, 2008 at 01:15:15PM -0700, Charles Beckham wrote:
> sorry, heres a uname
> x# uname -a
> FreeBSD x.worxtech.net 6.3-STABLE FreeBSD 6.3-STABLE #1: Sun May 25
> 12:15:51 CDT 2008 worxtech@x.worxtech.net:/usr/obj/usr/src/sys/X
> i386
>=20
> also i should point out that this machine has ~ 100 alias addresses on
> it, and the problem doesnt seem to appear with all of them, some
> appear to have a proper counter.
> ...
> i'm not quite sure why this problem is persistent but could it be
> related to my netmask address for the inet alias?
> i did some research and it appears i should be using 0xffffffff for my
> netmask for the alias interface? please let me know any thaughts you
> may have.
Ah. I recall that in older releases of FreeBSD, attempting to create
such "alias" entries netmask specifications that amounted to having
different "alias" specifications sharing a (sub)net generally failed to
work, with the suggestion to use 0xffffffff as the netmask for all such
alias specification being the usual suggestion.
Somehow, I thought that someone had done some work on this, but on a
6.3-STABLE system built 25 August, I still see in ifconfig(1):
alias Establish an additional network address for this interface. T=
his
is sometimes useful when changing network numbers, and one wis=
hes
to accept packets addressed to the old interface. If the addr=
ess
is on the same subnet as the first network address for this
interface, a non-conflicting netmask must be given. Usually
0xffffffff is most appropriate.
so unless there's some special reason you're using a different netmask for
the alia entrie, I think I'd suggest switching to 0xffffffff.
>....
Peace,
david
--=20
David H. Wolfskill david@catwhisker.org
Depriving a girl or boy of an opportunity for education is evil.
See http://www.catwhisker.org/~david/publickey.gpg for my public key.
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