fxp0 interface going up/down/up/down (dhclient related?)

[Alban Hertroys]

I'm having an issue where my fxp0 interface keeps looping between DOWN/UP, with dhclient requesting a lease each time in between. I think it's caused by dhclient:

solfertje # dhclient -d fxp0
DHCPREQUEST on fxp0 to 255.255.255.255 port 67
send_packet: Network is down
DHCPREQUEST on fxp0 to 255.255.255.255 port 67
DHCPACK from 109.72.40.1
bound to 141.105.10.89 -- renewal in 7200 seconds.
fxp0 link state up -> down
fxp0 link state down -> up
DHCPREQUEST on fxp0 to 255.255.255.255 port 67
DHCPACK from 109.72.40.1
bound to 141.105.10.89 -- renewal in 7200 seconds.
fxp0 link state up -> down
fxp0 link state down -> up
DHCPREQUEST on fxp0 to 255.255.255.255 port 67
DHCPACK from 109.72.40.1
bound to 141.105.10.89 -- renewal in 7200 seconds.
fxp0 link state up -> down
fxp0 link state down -> up
DHCPREQUEST on fxp0 to 255.255.255.255 port 67
DHCPACK from 109.72.40.1
bound to 141.105.10.89 -- renewal in 7200 seconds.
fxp0 link state up -> down
fxp0 link state down -> up
DHCPREQUEST on fxp0 to 255.255.255.255 port 67
DHCPACK from 109.72.40.1
bound to 141.105.10.89 -- renewal in 7200 seconds.
fxp0 link state up -> down
^C

In above test I turned off devd (/etc/rc.d/devd stop) and background dhclient (/etc/rc.d/dhclient stop fxp0), and I still go the above result. There's practically no time spent between up/down cycles, this just keeps going on and on.
fxp0 is the only interface that runs on DHCP. The others have static IP's.

Initially I thought the issue might be caused by devd, because I have both ethernet and 822.11 type NICs (2x ethernet, 1x wifi) in that system.

This is 9-STABLE from yesterday.

Before, I had 9-RELEASE running on this system with the same config, and that worked well.

I'm not sure it's related, but on the wireless interface I get  alot of:
Jun  9 12:08:11 solfertje kernel: ath0: stuck beacon; resetting (bmiss count 4)

ifconfig reads:
solfertje # ifconfig 
em0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
        options=4219b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4,WOL_MAGIC,VLAN_HWTSO>
        ether 68:05:ca:17:fe:f7
        inet 10.236.150.1 netmask 0xffffff00 broadcast 10.236.150.255
        inet6 fe80::6a05:caff:fe17:fef7%em0 prefixlen 64 scopeid 0x2 
        nd6 options=23<PERFORMNUD,ACCEPT_RTADV,AUTO_LINKLOCAL>
        media: Ethernet autoselect (1000baseT <full-duplex>)
        status: active
ath0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 2290
        ether 6c:fd:b9:68:db:36
        nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
        media: IEEE 802.11 Wireless Ethernet autoselect mode 11g <hostap>
        status: running
fxp0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
        options=4219b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4,WOL_MAGIC,VLAN_HWTSO>
        ether 00:0e:0c:b2:04:b0
        inet6 fe80::20e:cff:feb2:4b0%fxp0 prefixlen 64 scopeid 0x9 
        inet 141.105.10.89 netmask 0xffffff80 broadcast 141.105.10.127
        nd6 options=23<PERFORMNUD,ACCEPT_RTADV,AUTO_LINKLOCAL>
        media: Ethernet autoselect (100baseTX <full-duplex>)
        status: active
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
        options=600003<RXCSUM,TXCSUM,RXCSUM_IPV6,TXCSUM_IPV6>
        inet6 ::1 prefixlen 128 
        inet6 fe80::1%lo0 prefixlen 64 scopeid 0xd 
        inet 127.0.0.1 netmask 0xff000000 
        nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
wlan0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
        ether 6c:fd:b9:68:db:36
        inet 10.236.151.1 netmask 0xffffff00 broadcast 10.236.151.255
        inet6 fe80::6efd:b9ff:fe68:db36%wlan0 prefixlen 64 scopeid 0xe 
        nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
        media: IEEE 802.11 Wireless Ethernet autoselect mode 11g <hostap>
        status: running
        ssid solfertje channel 11 (2462 MHz 11g) bssid 6c:fd:b9:68:db:36
        regdomain 32924 country CN indoor ecm authmode WPA privacy MIXED
        deftxkey 3 TKIP 2:128-bit TKIP 3:128-bit txpower 20 scanvalid 60
        protmode CTS wme burst dtimperiod 1 -dfs
pflog0: flags=141<UP,RUNNING,PROMISC> metric 0 mtu 33152
        nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>

And the hardware is as follows:
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Alban Hertroys
--
If you can't see the forest for the trees,
cut the trees and you'll find there is no forest.