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WAN Routing

WAN Connections

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#1 Jaroth

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Posted 19 October 2015 - 12:41 PM

Is there a way to have the Link Balancer do a health check on the WAN connections and routing?  We have two WAN connections that are both active due to movement of the structure.  So at times the link balancer switches from WAN 1 to WAN 2 and vice versa, multiple times over a 4 hour period.  We find that in most cases the Link Balancer operates as planned but if both WAN links are unreliable for an extended duration the routing table has an issue so we need to access the Link Balancer remotely and do a "Reload" which causes the routing table to be rebuilt resolving the issue.  Has anyone else seen this or have a suggestion as to the configuration?

#2 Rick Cone

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Posted 19 October 2015 - 12:49 PM

Just a thought to possibly avoid this, use a DNS health check on both WAN links.  And, for each WAN link use the ISP's 2 specific and unique DNS servers on the link setup.  This prevents ISP from blocking the DNS health checks, and more importantly creates independent routes for the health checks... 

#3 Jaroth

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Posted 19 October 2015 - 01:55 PM

Thank you Rick.  We do have health DNS checks in place for both WAN Links.  And by rule, each link must use a different DNS server.  The issue is not the test being blocked but an issue with the Link Balancer seems to enter a state of confusion almost.  As soon as I do a reload it rebuilds the route table and tests the links using DNS as it should.  It there a way to optimize the time or health check on the Link Balancer routing itself?

#4 shivakumar

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Posted 21 October 2015 - 12:00 PM

You can optimize the delay of the test methods through expert settings. By default, a Link test interval is 5 Seconds. 
To enable expert settings, please navigate to the Advanced menu and then append "&expert=1" at the end of the URL in the address bar of your browser (without quotes) and press Enter. You will now be able to see a new tab named Expert Settings under Advanced. 

#5 Jaroth

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Posted 28 October 2015 - 02:51 PM

Thank you shivakumar.  I have attempted to optimize through the expert options but there still seems to be a delay at times.