kern/181257: bge link status change

[Konstantin]

>Number:         181257
>Category:       kern
>Synopsis:       bge link status change
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Aug 13 09:20:00 UTC 2013
>Closed-Date:
>Last-Modified:
>Originator:     Konstantin
>Release:        9.1-RELEASE and 9.2-BETA1
>Organization:
>Environment:
1-st system 
FreeBSD BSD_ev1 9.1-RELEASE FreeBSD 9.1-RELEASE #0 r243825: Tue Dec  4 09:23:10 UTC 2012     root at farrell.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC  amd64

2-nd system
FreeBSD smtp1.merlion.ru 9.2-BETA1 FreeBSD 9.2-BETA1 #0 r253470: Sun Mar  3 19:01:47 MSK 2013     root at dcgate1:/usr/obj/usr/src/sys/GATE  amd64

>Description:
bge interfaces doesn't logging link state changes.
Interface is up and status is active, after unplugging cable there's no message either in /var/log/messages nor on console (kern.consmute=0). If plug cable in interface, there's no message in log also.
But if exec "ifconfig" command when cable unplaged - message appears. After plug cable back appears "link up" message.
>How-To-Repeat:
1.Plug network cable into bge interface, bring it up.
2.Unplug cable from bge interface. (there's no log messages)
3.Plug cable back. (still no messages)
4. Unplug cable from bge interface. (still no messages)
5. exec "ifconfig" command from terminal.
6. Message 'link down' appears.
7. Plug cable in bge interface. Link change to up appears.
8. If unplug cable from bge there's no message until "ifconfig" executed.
>Fix:
There's no way to solve the problem.

>Release-Note:
>Audit-Trail:
>Unformatted: