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

[YongHyeon PYUN]

On Sun, Jun 09, 2013 at 12:21:37PM +0200, Alban Hertroys wrote:
> 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.
> 

Try attached patch and let me know whether it also works for you.
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