[Dnsmasq-discuss] Netgear GS108T disappears from DNS

[Sen Haerens]

I'm experiencing a strange problem where the DNS record of my Netgear  
switch disappears after some time (±1 hour).

sen at coppola:~$ dig netgear

; <<>> DiG 9.4.1-P1 <<>> netgear
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 1449
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;netgear.			IN	A

;; Query time: 10 msec
;; SERVER: 192.168.2.1#53(192.168.2.1)
;; WHEN: Fri Mar  7 13:29:44 2008
;; MSG SIZE  rcvd: 25

When I restart the switch:

sen at coppola:~$ dig netgear

; <<>> DiG 9.4.1-P1 <<>> netgear
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 62748
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;netgear.			IN	A

;; ANSWER SECTION:
netgear.		0	IN	A	192.168.2.3

;; Query time: 90 msec
;; SERVER: 192.168.2.1#53(192.168.2.1)
;; WHEN: Fri Mar  7 13:37:09 2008
;; MSG SIZE  rcvd: 41

This is my dnsmasq.conf:

sen at kubrick:~$ cat /etc/dnsmasq.conf
# network
interface=vlan2
bind-interfaces

# dns
domain-needed
bogus-priv
expand-hosts
local=/lan/
domain=lan

# dhcp
dhcp-authoritative
dhcp-range=192.168.2.2,192.168.2.20

# static dhcp clients
dhcp-host=spielberg,192.168.2.2
dhcp-host=00:1b:2f:d2:16:3c,netgear,192.168.2.3
dhcp-host=00:80:77:83:cd:fe,brother,192.168.2.4
dhcp-host=00:04:13:2a:06:7b,snom,192.168.2.5

# logging
#log-queries
#log-dhcp

Should I add any DHCP option?
I'm thinking the switch does something different when acquiring an IP  
via DHCP.

-- 
S.