amd64/155604: Flowtable excessively caches dest MAC addresses for outgoing UDP traffic

[Steve Polyack]

The following reply was made to PR amd64/155604; it has been noted by GNATS.

From: Steve Polyack <spolyack at collaborativefusion.com>
To: bug-followup at FreeBSD.org, spolyack at collaborativefusion.com
Cc:  
Subject: Re: amd64/155604: Flowtable excessively caches dest MAC addresses
 for outgoing UDP traffic
Date: Wed, 16 Mar 2011 16:32:54 -0400

 I've just confirmed that this can also happen with TCP.  As long as 
 something on the freebsd system is constantly trying to form a 
 connection to the same destination address & port, the old MAC address 
 of the router is used as the destination MAC address for new connection 
 attempts.  Since the connection attempts continue to match the old 
 flows, they are never expired.  Disabling the flowtable again causes 
 things to immediately return to normal and send traffic to the correct 
 destination MAC address.