Model: CRS125-24G-1S
Firmware: 3.33
RouterOS: 6.37.1 (also happened on 6.37 and 6.36, see: http://forum.mikrotik.com/t/port-mirror-only-ingress-is-mirrored/101912/1 )
After some time, days or weeks, mirror stops sending egress.
A reboot fixes the issue.
I haven’t been able to observe the specific time from reboot until the issue occurs, or figure out how to check for any related issues which could cause it (any way to monitor for this?).
Bug happened again after about 2 weeks. Only ingress is mirrored this time.
Reboot fixes it, but need stable solution for this.
now it happened after just 2 days.
Most likely same issue as: http://forum.mikrotik.com/t/crs125-mirror-stops-working-over-time/84045/1
Did you ever resolve this port mirroring error? I have similar problems with my CRS device, except I can’t get port mirroring to work at all (not even temporarily). My CRS model has wireless integrated, but otherwise I believe it is identical to yours. I wonder if the problem has changed since you reported it, since I’m running a newer version of routeros.
My post is here for cross reference: http://forum.mikrotik.com/t/questions-regarding-port-mirroring-on-cloud-router-switch/105616/1