Month: January 2017

sFlow and NetFlow implementation details from real field experience

Posted on by FastNetMon

Hello, Network guys! In this article I’ll try to share my experience with different traffic monitoring solutions. As you know I’m FastNetMon author and we support wide range of capture engines from really long list of vendors. From first days FastNetMon was developed with unification in mind. So we tried hard to implement all possible options to monitor your traffic and Read more about sFlow and NetFlow implementation details from real field experience[…]

How you could investigate issues with Netflow

Posted on by FastNetMon

Hello! Recently I discovered one pretty ugly bug with Mikrotik devices: https://github.com/pavel-odintsov/fastnetmon/issues/620 It was caused by software error because for some reasons Mikrotik produced flows with negative length. It’s pretty tricky to find this sort of bugs because only small number of Netflow collector software will notify you about incorrectly crafted Netflow. Also I found Read more about How you could investigate issues with Netflow[…]