I work for a small voice provider and we use public internet termination in combination with MPLS circuits to feed our voice network trunks. In the days of least cost routing our calls can be originated/terminated almost anywhere in the world and so we accept UDP traffic from many AS's around the globe.
Now, we will get tickets for our VIP customers where we need to figure out why we lost RTP UDP packets over the public internet. We have used bgpmon.net to monitor our own prefixes and use a variety of external "reachability" services but those dont give us a view of sub optimal route changes between any AS in the world and our AS at the time in question.
For example, if a link goes down between the big guys, say for example, between Verizon and L3 and there is a major re-route due to a fiber cut. Did that happen at the time of the call in question.
Any suggestions that wont break the bank?
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