I currently employ NPM and Netflow Traffic Analyzer. We have two internet connections. I would like to be notified if one of these internet connections go down. I cannot figure out the best way to do this and my searches only have people that had one internet connection. I would greatly appreciate any help.
Depends where you terminate the two ISP.
I would set up an IP SLA, and based on that i would even shutdown the BGP (when IP SLA fail). Sometimes your BGP peer is up, but your ISP can not route to other ISP/internet and that upstream issue can impact your services. Once you have your IP SLA, you can get up a custom monitor one you figure out the MIB associated with it.
As a secondary option is to set up a source based route so you can ping 22.214.171.124 over ISP A and 126.96.36.199 over ISP B. For that you can just use a normal object ICMP monitor. You should pick multiple IPs to monitor over each ISP. I normally monitor 3 IPs. If they all fail , i have the process auto shutdown bad BGP peer.
I hope this helps.
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