Hi Guys,
I observed something.
On two occassions, I physically changed two Cisco routers (Cisco 2951) that had an issue with high memory.
Please note that real-time and historical information were gotten from this devices before the replacement.
Before the replacement, I could get details on Availability, packet losses, CPU/memory, and traffic information (current and/or historical).
To my greatest surprise, as soon as the replacement was completed, monitoring of the devices were lost; all that is seen is response time and packet loss to be at 0%, overall hardware status becomes undefined, and one or more of the interfaces on the devices have states that are "Unknown"
Kindly assist me with detailed explanations.
Regards,