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From: Ryan Steinmetz <zi@FreeBSD.org>
Subject: Re: kern/156226: Lagg failover does not announce the failover to
 switch
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The following reply was made to PR kern/156226; it has been noted by GNATS.

From: Ryan Steinmetz <zi@FreeBSD.org>
To: Per von Zweigbergk <pvz@itassistans.se>
Cc: freebsd-gnats-submit@FreeBSD.org
Subject: Re: kern/156226: Lagg failover does not announce the failover to
 switch
Date: Mon, 22 Oct 2012 21:12:40 -0400

 This isn't a solution, but is a workaround that I've been using for a
 bit:
 http://people.freebsd.org/~zi/ping
 
 You can drop the file in /usr/local/etc/rc.d and then add
 ping_enable="YES" to /etc/rc.conf
 
 Basically, it sends an icmp echo request to your default gateway every 5
 seconds by default, which forces the switch to update its FIB.  This
 means that after a maximum of 5 seconds after lagg completes an
 interface failover, you should regain network connectivity.
 
 -r