dhcp-3.0.1rc12 server daemon woes :-(

[Nick Garfield]

>=20
> I noticed, going back through the archives, that you ran into=20
> this same
> problem in July.  How did you correct the issue then?
That issue was not exactly the same - it may be related, but I cannot
say that.  I'll explain....
Our setup has the DHCP servers on different subnets, separated by a
router.=20
When the router was rebooted it cut the communications link between the
servers causing a "communications interrupted" message in syslog.
When the router came back up, "communication normal" was never
re-established.  When this happened, after about half an hour on busy
segments "peer holds all free leases" messages started to appear on BOTH
servers - and clients on those particular segments were not given
addresses.

The new problem is similar, but the communication is normal between the
servers, and peer holds all free leases appears only on the backup
server.  This happens intermittently on any segments, whether loaded or
not.



> What do the leases look like when you run the leasstate=20
> script from Kevin
> Miller's site (http://www.contrib.andrew.cmu.edu/~kevinm/dhcp)?

I have my own scripts to count the active leases in the leases file,
although I have used Kevin's cgi-based script in the past also - it is
very good. =20

Here is an example.
I will look in the syslog now by grepping=20
Oct 16 16:30:19 ip-srv-4 dhcpd: DHCPDISCOVER from 00:0b:ac:e6:b3:c8 via
137.138.194.65: peer holds all free leases

For this network my script returns:

IP ADDRESS       STATE     START     END       HW_ADDRESS
HOSTNAME              DEVICE NAME
128.141.44.72    free
128.141.44.73    free
128.141.44.74    free
128.141.44.75    free
128.141.44.76    free
128.141.44.77    free
128.141.44.78    backup
128.141.44.79    backup
128.141.44.80    free
128.141.44.81    free
128.141.44.82    free
128.141.44.83    free
128.141.44.84    free
128.141.44.85    free
128.141.44.86    free
128.141.44.87    free
128.141.44.88    active    16:40:56  17:10:53  00-04-75-19-F0-6E
HPSLMOB06             HPSLMOB06
128.141.44.89    backup
128.141.44.90    backup
128.141.44.91    backup
128.141.44.92    free
128.141.44.93    backup
128.141.44.94    free
128.141.44.95    free
128.141.44.96    free
128.141.44.97    free
128.141.44.98    free
128.141.44.99    backup
128.141.44.100   backup
128.141.44.101   free
128.141.44.102   backup
128.141.44.103   backup
128.141.44.104   free
128.141.44.105   backup
128.141.44.106   free
128.141.44.107   backup
128.141.44.108   backup
128.141.44.109   backup
128.141.44.110   free
128.141.44.111   backup
128.141.44.112   free
128.141.44.113   backup
128.141.44.114   backup
128.141.44.115   backup
128.141.44.116   backup
128.141.44.117   backup
128.141.44.118   free
128.141.44.119   free
128.141.44.120   backup
128.141.44.121   backup
128.141.44.122   backup
128.141.44.123   backup
128.141.44.124   free
128.141.44.125   backup
128.141.44.126   backup

The corresponding entry in the dhcpd.conf file is:

shared-network "Shared-S864-1-PB1" {
        authoritative;
        subnet 137.138.194.64 netmask 255.255.255.192 {} #S864-1-PB1
        subnet 128.141.44.64 netmask 255.255.255.192 { #S864-1-DA1
                option routers 128.141.1.1;
                option subnet-mask 255.255.0.0;
                option broadcast-address 128.141.255.255;
                pool {
                        failover peer "boson";
                        deny members of "blocked-list";
                        deny dynamic bootp clients;
                        range 128.141.44.72 128.141.44.126;
                }
        }
}