Hi Hammer91,
I reviewed the pp2 file you sent over and your connection looks pretty solid. You've got an average latency of ~23ms to iRacing with no packet loss (at least for this time period). This data suggests that the issues you're experiencing are probably not related to anything on the network.
That said you can still continue to collect PingPlotter data and wait until the issue happens again. Then check back in PingPlotter to see if anything interesting happened on the network. Feel free to upload any other pp2's/screenshots if anything comes up!