Re: bin/51568 (base dhcpd dumps core in a CARP setup)

[Frank Kardel <kardel%netbsd.org@localhost>]

The following reply was made to PR bin/51568; it has been noted by GNATS.

From: Frank Kardel <kardel%netbsd.org@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: 
Subject: Re: bin/51568 (base dhcpd dumps core in a CARP setup)
Date: Thu, 22 Jul 2021 09:56:01 +0200

 On 07/22/21 09:05, David Holland wrote:
 >   On Wed, Jul 21, 2021 at 12:25:01PM +0000, Frank Kardel wrote:
 >    >  Well, I do have some carp setups - works for IPv4 only, is likely to
 >    >  lock up when configuring IPv4 and IPv6 on the carp device.
 >    >
 >    >  The lockup still needs to be investigated.
 >   
 >   Is there a PR for that? If not, please file one :-)
 Sure, once I am able to collect some information about it instead of 
 reciting my memory from a year ago.
 The pattern is like this:
      A and B run.
      A is master in 4 crap instances.
      B ist backup on those instances
      A goes down
      B becomes master on those 4 instances
      A comes up and gets stuck forever in "waiting for DAD to complete"
 Unfortunatly this happens on our gateway routers to testing time is 
 limited. Maybe
 I can recreate that elsewhere but not on short notice.
 >   
 >    >  As for the dhcpd aborting. I have seen that also. It had nothing to do
 >    >  with carp other that when you
 >    >
 >    >  start to use carp you are likely to use dhcpd fail over. I moved to
 >    >  pkgsrc-isc_dhcpd and that worked.
 >    >
 >    >  Thus at that time dhcpd in the base had a problem. the pkgsrc version
 >    >  (same release) was fine.
 >    >
 >    >  I haven't checked todays state of affairs though.
 >   
 >   Does this warrant reopening this PR or would it be better to generate
 >   a new one?
 Probably a new one to get rid of the carp association.
 >   
 >   --
 >   David A. Holland
 >   dholland%netbsd.org@localhost
 >   
 Frank