I have a C5210 controller. I have a primary and a foreign. I got a critical error message from the RU Manager. It says that my foreign controller (.108) lost connectivity with the primary (.109). How do I find out why/how this happened. I think this is the second time in 2 months,
I think it's hard to find the root cause for the link loss.
How long till the tunnel was up again ?
Just from this one screenshot the first thing that I'd check is the ESA utilization as you use only one port of the controller.
I'd also check the switch port counter and reset it to see any error counter increase over time.