Re: 5.4-RELEASE and 5.5-RELEASE Slow routing table response


On Feb 22, 2007, at 1:45 PM, Jeremy Nelson wrote:

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.



This is almost definitely a DNS issue.

Try "route -n get" or "telnet -N" and see if it still happens.

-- Kevin



_______________________________________________
freebsd-net@xxxxxxxxxxx mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-net
To unsubscribe, send any mail to "freebsd-net-unsubscribe@xxxxxxxxxxx"

Relevant Pages

  • Re: Cannot get NAT to route in RRAS
    ... ADSL Link was set as the Public interface in NAT, ... The static route also adds in fine using the ADSL Link interface, ... separate DNS server handles client’s requests, ... > Internet connection. ...
    (microsoft.public.win2000.ras_routing)
  • Re: 2 Nics 1 Dial
    ... in RRAS if I create from scratch, ... Connection Server -> NAT -> demand-dial ... number etc, route IP packets, account info ...
    (microsoft.public.win2000.networking)
  • RE: Route added by RRAS that overrides local LAN route on NIC
    ... When a remote computer connects to the Routing and Remote Access server by ... using a dial-up or a VPN connection, ... PPP adapter in DNS or WINS, you may receive errors on the local computers ... Route added by RRAS that overrides local LAN route on NIC ...
    (microsoft.public.windows.server.sbs)
  • Re: Use to be able to VPN/RDP. After installing SBS2003, can only VPN
    ... disconnected the VPN since it's a) only showing one IP address for the nic. ... server and it where you are getting VPN authenticated, IP address, DNS ... With our PPTP connection while you were connected the routing table would ... The 1.1.1.1 route is used in order to keep the physical connection for the ...
    (microsoft.public.windows.server.sbs)
  • RE: Route added by RRAS that overrides local LAN route on NIC
    ... I am using SBS as the VPN server. ... The route I am speaking of is the route to local LAN that is put in the ... After the RAS client connects there is another route added so the two ...
    (microsoft.public.windows.server.sbs)