[Dnsmasq-discuss] can't take away IPv4 address

[Harald Dunkel]

Hi folks,

AFAICS there is no way for dnsmasq to make a client
stop using an IPv4 address if the lease expires. Esp.
some Apple and Android devices seem to play dirty.

Sure, they accept the new IP address via DHCP and 
start using it, but the old address is not dropped. 
Result is

:
Aug 25 08:08:04 gate /bsd: arp info overwritten for 10.10.123.204 by 00:1f:f3:08:xx:xx on re1
Aug 25 08:08:25 gate /bsd: arp info overwritten for 10.10.123.204 by 6c:94:f8:e2:yy:yy on re1
Aug 25 08:20:12 gate /bsd: arp info overwritten for 10.10.123.204 by 00:1f:f3:08:xx:xx on re1
Aug 25 08:20:25 gate /bsd: arp info overwritten for 10.10.123.204 by 6c:94:f8:e2:yy:yy on re1
Aug 25 08:20:26 gate /bsd: arp info overwritten for 10.10.123.204 by 00:1f:f3:08:xx:xx on re1
Aug 25 08:21:55 gate /bsd: arp info overwritten for 10.10.123.204 by 6c:94:f8:e2:yy:yy on re1
:

This is from /var/log/messages on the dnsmasq server.
Of course, there is only one lease for this IP address
(I checked). I wonder if dnsmasq could detect and work 
around this conflict?


Every helpful comment is highly appreciated
Harri
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