I have a computer with two interfaces, a wired and a wireless interface.
Both appear to function correctly, BUT:

After about half an hour, the dhcpcd for the wireless interface will start
querying the DHCP servers over and over again, twice every 3 seconds, and
will continue to do so until dhcpcd is killed or restarted, after which it
works correctly for half an hour again. A short log excerpt:

May 7 00:16:41 tree dhcpd: DHCPREQUEST for 172.16.24.9 from
00:0b:cd:74:1a:bf via eth1
May 7 00:16:41 tree dhcpd: DHCPACK on 172.16.24.9 to 00:0b:cd:74:1a:bf via
eth1
May 7 00:16:41 tree dhcpd: DHCPREQUEST for 172.16.24.9 from
00:0b:cd:74:1a:bf via eth1
May 7 00:16:41 tree dhcpd: DHCPACK on 172.16.24.9 to 00:0b:cd:74:1a:bf via
eth1
May 7 00:16:44 tree dhcpd: DHCPREQUEST for 172.16.24.9 from
00:0b:cd:74:1a:bf via eth1
May 7 00:16:44 tree dhcpd: DHCPACK on 172.16.24.9 to 00:0b:cd:74:1a:bf via
eth1
May 7 00:16:44 tree dhcpd: DHCPREQUEST for 172.16.24.9 from
00:0b:cd:74:1a:bf via eth1
May 7 00:16:44 tree dhcpd: DHCPACK on 172.16.24.9 to 00:0b:cd:74:1a:bf via
eth1
May 7 00:16:47 tree dhcpd: DHCPREQUEST for 172.16.24.9 from
00:0b:cd:74:1a:bf via eth1
May 7 00:16:47 tree dhcpd: DHCPACK on 172.16.24.9 to 00:0b:cd:74:1a:bf via
eth1
May 7 00:16:47 tree dhcpd: DHCPREQUEST for 172.16.24.9 from
00:0b:cd:74:1a:bf via eth1
May 7 00:16:47 tree dhcpd: DHCPACK on 172.16.24.9 to 00:0b:cd:74:1a:bf via
eth1

# ps -fC dhcpcd | cat
UID PID PPID C STIME TTY TIME CMD
root 8206 1 0 May05 ? 00:00:00 /sbin/dhcpcd -h fairy -t 5
eth0
root 20189 1 0 00:22 ? 00:00:00 /sbin/dhcpcd -h fairy -t
15 -m 2000 wlan0

The only thing I can see is that dhcpcd sets the hostname where it shouldn't
(gentoo doesn't allow for specifying a hostname per interface, or rather, it
will tack on -h `hostname` regardless), but that shouldn't affect the
renewal. The DHCP servers are set to ignore the hostname for gentoo hosts,
due to this design flaw.

This problem only occurs for the wlan0 interface, and not for eth0.

Anyone seen this, and know what could cause this misbehaviour?

Regards,
--
*Art