5.4-RELEASE and 5.5-RELEASE Slow routing table response

[Jeremy Nelson]

I have an Internet proxy that is running FreeBSD 5.4-RELEASE.  This server has been up and running beautifully for about a year and a half with no issues.
   
  Just the other day I had a user try to connect to a host on the Internet and her connection was failing.  At first I thought that it was the receiving host's issue because we were having no other Internet connection issues through the proxy.  However, I ran a test connection from my home and found that everything worked fine.
   
  After investigating the issue I found that if I ran a "route get xxx.xxx.xxx.xxx" on my proxy server it would take 1.25 minutes for the route to come back.  This same delay was also experienced if I tried to use telnet to open a connection to the remote host.  After about 1.25 minutes the session would open successfully.
   
  So I ran "route monitor" and found that when I execute the "route get" command the RTM_GET returns the appropriate route almost immediately but there is still a substantial delay in the "route get" command displaying the response.
   
  I ran this test on three other 5.4 and one 5.5 servers and found that they all had the same issue.  However, if I ran the same "route get" command on a 5.3 server it works just fine.
   
  After all of my testing I wanted to know exactly what IP address range was affected and found that it is limited to just 60 address within a specific range (I can provide the range).
   
  Any help you could provide would be greatly appreciated.

 
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