Strange traffic in NetFlow Analyzer

Strange traffic in NetFlow Analyzer

Past few days I've seen the following traffic. The source IP addresses look strange to me and the destination addresses are to difference places and countries that aren't part of our network. All this traffic gets blocked by our ACLs on our router. But it looks strange. And the protocols are old routing protocols and I think monitoring protocols. And the size of the traffic is always 805.31 MB. 
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