GS116Ev2 Port Mirroring and loss of mirrored traffic

[OverSeer]

I've recently set up port mirroring on my GS116Ev2 (firmware v. 2.6.0.24) and it works... at least for a little while. For some reason, and I don't have the exact amount of time involved, the mirroring will just "stop". The mirror is still set up but I'm no longer getting the mirrored traffic to the specified port. A simple reboot of the switch and I start receiving the mirrored traffic again. Any ideas of what to look for or try?

[Nodism1125 · Accepted solution]

Hi OverSeer, 

Please try another port as Destination Port and see if you encounter the same issue. Also, check if CRC error counts increasing under Port Statistics.

[JohnC_V]

Hi OverSeer,

Welcome to our community! 🙂

May I know if you are trying to get a packet capture on a mirrored port? How long are you trying to run the packet capture? It may only take about 30 seconds to get a packet capture. 

Regards,

[OverSeer]

Not running a packet capture but a security monitoring device is attached to that port to get the feed of traffic for analysis.

[Nodism1125 · Accepted solution]

Hi OverSeer, 

Please try another port as Destination Port and see if you encounter the same issue. Also, check if CRC error counts increasing under Port Statistics.

[OverSeer]

Sorry for the long delay. I was able to get the port mirroring to work by hard reseting the switch *and* trying a different port. Something's just "up" with port 9 on my switch when it comes to mirroring for some unknown reason ¯\_(ツ)_/¯.