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Home » Kerio User Forums » Kerio Control » Load Balancing with Win. 2008 Server Problems (Any input helps!)
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kaptain1

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Hey Everyone,

We just upgraded our KWF server to Windows Server 2008 Std., and now having the following problem:

2 ADSL lines that are Load Balancing are working OK for short period of time, but then 1 of the lines ALWAYS goes into UP/Inactive state.

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We've checked everything possible, tried setting up PPPoE to be dialed from the server, but nothing helps.

The problem has been traced to some sort of incompatibility of KWF with Windows 2008 Server Std. O/S.

Any ideas?
Why would 2008 Server always set one of the WAN connections to 'Inactive'?

Thanks in advance!
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Jan Jezek (Kerio)

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Right click the debug log and enable 'Internet Connectivity' debugging messages. There you should see the reason why a link goes to the inactive state.

Jan Jezek
Product Development Manager - Kerio Control
Kerio Technologies
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kaptain1

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Thanks for the tip!

Here's what's happening as i observed:

1. KWF sets both interfaces as UP/Active (once it gets their public IP's).
2. Once it acquired its IP's, it attempts to PING the 'probe IP' that I set-up (OpenDNS ip addres: 208.67.222.222). One of the Internet Nics successfully receives responce, but the SECOND Internet NIC always gets "probe timeout" after 3 timeouts it sets the connection to UP/Inactive.

end of story.. Sad, this has never happened on our XP Pro or W2003 machines, only this new Windows 2008 Server

More of observations:
The 2nd NIC that shows up as Inactive doesn't have a Default Gateway when i do IPCONFIG. Hovewer, KWF gets the gateway IP from somewhere and shows it in its "Interfaces" tab.


To me it seems like Windows2008 doesn't like having 2 different GATEWAYS from different NICs.

Any ideas?

Thanks for helping Sad
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Jan Jezek (Kerio)

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That's correct behavior with the 1 gateway. As a test, try to configure higher bandwidth on the failing link than you have on the other one. That should make the other gateay visible in the system. Then observe if anything changes in the debug log.

Jan Jezek
Product Development Manager - Kerio Control
Kerio Technologies
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kaptain1

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But in the beginning, KWF gets gateway information for both Internet connections, then only 1 of them remains Active.

Why would it make 2nd NIC inactive since it's configured as "Load Balancing", and not fail-over?

Also:
After few minutes, the 2nd Inactive gateway looses its IP if i do IPCONFIG (shows up as 169.x.x.x), however, it still shows its IP address in KWF.

I will try your suggestion and report back *hopefully w/ new insights*.

Thanks!

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kaptain1

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Hello,

I've tried your suggestion, and increased the shared bandwidth on the "Inactive" link. That haven't changed anything.

Is there any specific additional things I have to configure in Windows 2008 Server to get Load Balancing work properly?

Please advice,

Thank You!
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Jan Jezek (Kerio)

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For some reason KWF is unable to ping the probe host through the link. There are many possible causes from a conflicting software to a bad NIC driver. Have you checked your RRAS service configuration, BTW?

To determine what's going wrong, I suggest you contact Kerio's technical support.

Jan Jezek
Product Development Manager - Kerio Control
Kerio Technologies
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Nikxx

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Never had that kind of problem and i am using kerio with a 2008 server.

Try setting the ping for the modem lan address.

My msn is : nikxx<_a.t_>bol.com.br ( just in case you want to discuss it more further. )

Cya !
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