Date: Thu, 24 Jan 2008 10:36:34 -0600 From: Brooks Davis <brooks@freebsd.org> To: Yousif Hassan <yousif@alumni.jmu.edu> Cc: freebsd-net@freebsd.org, Brooks Davis <brooks@freebsd.org>, "Bruce M. Simpson" <bms@freebsd.org> Subject: Re: network interface monitoring? Message-ID: <20080124163634.GA25331@lor.one-eyed-alien.net> In-Reply-To: <1201190313.2591.7.camel@localhost> References: <1201125022.2106.67.camel@localhost> <20080123222047.GA14264@lor.one-eyed-alien.net> <1201190313.2591.7.camel@localhost>
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--HlL+5n6rz5pIUxbD Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Jan 24, 2008 at 10:58:33AM -0500, Yousif Hassan wrote: > Thank you to all who responded. >=20 > The suggestion was made to use devd or ifstated. Both sound like > excellent tools, but I'm currently being tripped up by a core problem - > both tools rely on the kernel to notify userland of link state changes > (which makes complete sense!). This is all well and good - but the > current issue I'm seeing is that the link state doesn't get updated > without running "ifconfig" again - is this by design? A known "issue?" >=20 > An example: > 1. Unplug network cable from bfe0 > 2. I run ifconfig > 3. I see that interface bfe0's status is "no carrier". Good. > 4. I plug the cable into bfe0 > 5. Wait... wait... look in /var/log/messages... wait more.. NO STATE > CHANGE - the longest I've waited was 2 minutes, which is already too > long > 6. run "ifconfig" again > 7. Link state immediately changes, logs to /var/log/messages, devd > scripts run >=20 > Is this a known behavior? It seems like the link state changes should > happen automatically, without something to "trigger" them. Isn't there > some kind of poll or interrupt sequence? I'm on 6.3 RC2 (will upgrade > to 6.3-RELEASE imminently) but can't imagine this code changed? Does > this work differently/better in 7.0? It's known but not well understood and is a driver bug. -- Brooks --HlL+5n6rz5pIUxbD Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (FreeBSD) iD8DBQFHmL6RXY6L6fI4GtQRAniAAJ412B+KsDqaoAA9lQDbBQH9FCbTnACeJH9b rdAlvAK0c40kOwvIPKwXo7Y= =thqW -----END PGP SIGNATURE----- --HlL+5n6rz5pIUxbD--
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