>Number: 151063
>Category: conf
>Synopsis: [rc.subr] Verify network link and packet flow before starting
>network services
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: change-request
>Submitter-Id: current-users
>Arrival-Date: Wed Sep 29 10:00:11 UTC 2010
>Closed-Date:
>Last-Modified:
>Originator: Jeremy Chadwick
>Release: FreeBSD 8.1-STABLE amd64
>Organization:
>Environment:
System: FreeBSD icarus.home.lan 8.1-STABLE FreeBSD 8.1-STABLE #0: Wed Sep 15
14:59:46 PDT 2010
[email protected]:/usr/obj/usr/src/sys/X7SBA_RELENG_8_amd64 amd64
>Description:
There's a long-standing issue that plagues both users and system
administrators
on FreeBSD: network services (named, ntpd, etc.) starting before the
actual
network layer is up and fully functional. Monitoring link state
according to
ifconfig is not enough -- actual packet flow verification is needed.
I've written a script along with the help of the community and Doug
Barton
to help alleviate this problem as best possible. There are better
solutions
over the long-term, involving daemons which maintain/spawn services
(think
svcs(1) and svcadm(1M) on Solaris), but for now this should be
sufficient.
Original discussion thread:
http://lists.freebsd.org/pipermail/freebsd-stable/2010-April/056400.html
The script is in use by existing community users, and tested by a good
number
of people with complex network environments (dual NICs + vlan(4) + NAT)
on
both RELENG_7 and RELENG_8. So far it has been used by placing the
script
into /usr/local/etc/rc.d followed by setting appropriate vars in
/etc/rc.conf:
http://jdc.parodius.com/freebsd/netwait
Patches for rc.conf(5) man page and /etc/defaults/rc.conf:
http://jdc.parodius.com/freebsd/netwait_patches/
All of this should be reviewed by someone with familiarity with rc(8).
Please CC Doug Barton <[email protected]> as well. Thanks!
>How-To-Repeat:
n/a
>Fix:
n/a
>Release-Note:
>Audit-Trail:
>Unformatted:
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