failover

[David W. Hankins]

On Wed, Jun 21, 2006 at 02:42:06PM -0400, Billy Cook wrote:
> Jun 21 14:32:12 dhcp1 dhcpd: uid lease 192.168.254.25 for client
> 00:06:5b:c4:b3:16 is duplicate on BOBO
> Jun 21 14:32:12 dhcp1 dhcpd: DHCPREQUEST for 192.168.254.26
> (192.168.254.11) from 00:06:5b:c4:b3:16 via eth0: lease owned by peer

This is normal.  Depending on your 'split' value, one server or
the other will answer all queries, so long as they are in normal
state.  The servers ignore this rule either if the client supplies
a 'secs' field that exceeds "load balance max secs" or if they
are out of touch with each other.

DISCOVERs are load-balanced in this way, REQUESTs depend upon
the lease ownership (both servers might answer if the state
is ACTIVE).

The latter is largely because the server currently can't tell the
difference between unicast and broadcast REQUESTs, so it errs on
the side of caution.

-- 
David W. Hankins		"If you don't do it right the first time,
Software Engineer			you'll just have to do it again."
Internet Systems Consortium, Inc.		-- Jack T. Hankins