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Date: Tue, 21 Aug 2012 19:42:17 +0300
From: Vitalij Satanivskij <satan@ukr.net>
To: Garrett Cooper <yanegomi@gmail.com>
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Cc: Vitalij Satanivskij <satan@ukr.net>, current@freebsd.org
Subject: Re: dhclient cause up/down cycle after 239356 ?
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Garrett Cooper wrote:
GC> On Tue, Aug 21, 2012 at 2:55 AM, Vitalij Satanivskij <satan@ukr.net> wrote:
GC> > Hi all,
GC> >
GC> > After last update my home machine begin doin some strange things -
GC> 
GC> ...
GC> 
GC> Try reverting r239356 -- if that works, then please let jhb@ know.
GC> -Garrett

Yes i'm revert it and everything is ok.

Look's like dhclient do down/up sequence -

Aug 21 19:21:00 home kernel: fxp0: link state changed to UP
Aug 21 19:21:01 home kernel: fxp0: link state changed to DOWN
Aug 21 19:21:01 home dhclient: New IP Address (fxp0): xx.xx.xx.xx
Aug 21 19:21:01 home dhclient: New Subnet Mask (fxp0): 255.255.255.0
Aug 21 19:21:01 home dhclient: New Broadcast Address (fxp0): xx.xx.xx.xx
Aug 21 19:21:01 home dhclient: New Routers (fxp0): xx.xx.xx.xx
Aug 21 19:21:03 home kernel: fxp0: link state changed to UP

and in r239356 when iface down dhclient exiting then iface become up, dhclient staring, get adress, bring iface down (why?) and exit.

Before r239356 iface just doing down/up without dhclient exit and everything work fine.