This document describes a problem encountered where you see alarms on the chassis when you monitor the Power Shelf Unit (PSU) on the MSE chassis with both the chassis and the Ethernet port on the Network Interface Card (NIC) card simultaneously.
The PSU on the MSE chassis can be monitored with the Supervisor MSE 8050 Series blade or with a Valere NIC which connects to an Ethernet that gives access to the PSU via web, Telnet, or Simple Network Management Protocol (SNMP).
This image shows the MSE 8000 Series DC power shelf:
This NIC card can be inserted into the Power Shelf in order to monitor it.
Often it is seen that customers' attempts to monitor the status of the Power Shelf with both the chassis and the Ethernet access through the NIC card cause these alarms to display on the chassis.
The Alarm Log shows this log:
The power shelves do not support IP address logins at the same time as serial logins that use the same user name, so the use of this application causes the power shelf monitoring by the supervisor blade to break. Therefore, Cisco does not recommend that you monitor the Power Shelf through Ethernet and serial connection simultaneously. If you disconnect one of them, it should resolve the issue. The supported strategy is to use either the serial cable (chassis) or Ethernet (NIC card) to monitor the status of the power supply.