Fedora Users — dynamic dns, bind + dhcpd problem

dynamic dns, bind + dhcpd problem

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Hi,

I have dhcpd set up to register dhcp clients to bind, supposedly with a TTL of 43200 (12 hours). However, the registration is actually lost after 3600 seconds (1 hour). Why?

Here's the log of registration and deletion:

Jan 7 09:12:54 server2 dhcpd: DHCPREQUEST for 192.168.0.97 from 08:00:86:1a:a1:cc (MLT1AA1CC) via eth0 Jan 7 09:12:54 server2 dhcpd: DHCPACK on 192.168.0.97 to 08:00:86:1a:a1:cc (MLT1AA1CC) via eth0 Jan 7 10:12:54 server2 dhcpd: if MLT1AA1CC.domain.avtechpulse.com IN TXT "31aacbf084144284a227ccfaec56201572" rrset exists and MLT1AA1CC.domain.avtechpulse.com IN A 192.168.0.97 rrset exists delete MLT1AA1CC.domain.avtechpulse.com IN A 192.168.0.97: success.


The key parts of my dhcpd.conf are:


ddns-update-style interim;
ddns-updates on;
ddns-ttl 43200;
ddns-rev-domainname "in-addr.arpa";
ddns-domainname "domain.avtechpulse.com";

authoritative;

default-lease-time 43200;
max-lease-time 43200;

option ....<snipped>......

ignore client-updates;

subnet 192.168.0.0 netmask 255.255.255.0 {
        range dynamic-bootp 192.168.0.20 192.168.0.99;
        allow unknown-clients;
        }

... <the rest is snipped> ...

Why is dhcpd removing entries after 3600 seconds? Any suggestions?


- Mike