NetMRI Operation Center assigns the management collector for a device using an algorithm. It runs every hour against devices served by a temporary management collector.
The algorithm is as follows:
If the user manually assigned the management collector for the device, it is used as such.
If not, the following sequence applies to select it automatically:
- If the current collector guessed CLI credentials for the device, it is assigned as the management collector. The algorithm finishes.
- Else, a search is performed among the other collectors that discovered the device for the one that guessed CLI credentials. If such a collector is found, it is assigned as the management collector. The algorithm finishes.
- If no such collector is found and the timeout for choosing the collector has not yet elapsed, the collector selection is postponed for an hour. This continues until a collector with device CLI credentials is found.
- If no collector with device CLI credentials is found and the timeout for choosing the collector has elapsed, the IP addresses of all those collectors are sorted in the following order of priority:
- Software Loopback interface with the lowest if Index and IP address with the lowest numeric value.
- Interface name of "mgmt" with lowest ifIndex and IP address with the lowest number value.
- ethernet-csmacd interface with lowest ifIndex and IP address with the lowest numeric value.
- Interface with lowest ifIndex and IP address with the lowest numeric value.
- The highest priority IP address is selected and the corresponding collector is assigned as the management collector for the device.
You can change the timeout for choosing the collector in Deduplication and Load Balancing Settings.