On Thu, 15 Nov 2007, Brian A Seklecki (Mobile) wrote:

> Date: Thu, 15 Nov 2007 14:32:23 -0500
> From: "Brian A Seklecki (Mobile)" <bseklecki@collaborativefusion.com>
> To: tech@openbsd.org
> Subject: kernel/5513: Improved carp(4) debugging
>
> All:
>
> I'd like to solicit feedback on PR kernel/5513. It adds debug
> statements for carp(4) interface state transitions (a la cisco's "debug
> standby"). This helps administrator troubleshoot events.
>
> http://archive.openbsd.nu/?ml=openbs...7-06&m=4482959
>

BTW, I had no idea, but it would appear that FreeBSD already has a
significant patch that adds even better logging (the reasons are
enumerated in the individual function - I had considered this):

http://www.freebsd.org/cgi/cvsweb.cg...1.4;r2=1.5;f=h

From 36 months ago.

We'd be crazy not to adopt these changes.

~BAS

> Nov 14 06:01:12 atlas kernel: carp3: MASTER -> BACKUP (more frequent
advertisement received)
> Nov 14 06:03:36 atlas kernel: carp2: BACKUP -> MASTER (preempting a
slower master)



> For one thing, it would certainly cut back on mailing list traffic on
> the subject. It would even help more-advanced administrator diagnose
> problems (hardware, network) that they might not even know that they
> have.
>
> ~BAS
>
> PS> I would take it up directly with the subsystem maintainer, but a lot
> of people touch netinet/carp.{h,c}: chl@ , mpf@ , claudio@ , markus@ ,
> joel@ , reyk@