Hot!Detect Non Stable WAN with Link monitor

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one.co.il
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2018/12/13 07:21:17 (permalink)
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Detect Non Stable WAN with Link monitor

Hi
I setup Link monitor for redundant Wan connections. It's working great when WAN line is down 
but if a WAN line is not stable and getting 40% packet lost its not taking it down.
probably because its not getting 3 bad ICMP in a row
is there an other setting that i can configure for detecting non stable Connection?
#1

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    Toshi Esumi
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    Re: Detect Non Stable WAN with Link monitor 2018/12/13 15:53:13 (permalink)
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    There might be something different in SD-WAN config to specifically detect packet losses, which I'm not familiar with. But again it would be likely using the same ping mechanism the link-monitor uses.
    If the packet loss rate is consistently 40%, the probability is your link-monitor ping packets would be lost 40% as well. In reality those drops don't happen exactly in the same sequence all the time like !!!!!!....!!!!!!....!!!!!!!....(18 successes/12 failures) and so on. But likely something like !!..!!.!!..!!!.!!!!....!!..!!!(18 successes/12 failures).
    I think you can adjust the interval shorter from the default 5 sec, and less failtime from the default 5 times to catch those failures to trigger a failover. Most difficult part is you can't test until 40% packet loss ready happens.
     
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    neonbit
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    Re: Detect Non Stable WAN with Link monitor 2018/12/13 22:29:11 (permalink)
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    SD-WAN is the way to go, you can create a SLA rule to say if ping drops are less than 40% then goto secondary link.
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    one.co.il
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    Re: Detect Non Stable WAN with Link monitor 2018/12/16 05:42:38 (permalink)
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    neonbit
    SD-WAN is the way to go, you can create a SLA rule to say if ping drops are less than 40% then goto secondary link.


    It seems that the Link status configuration of SD-WAN are the same as Link monitor
    ICMP fail for X times at X intervals  
    #4
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