Selecting Network Monitor Cache in the left panel of the Options tab provides the following view, where you can edit network monitor cache settings. The network monitor cache stores information about the physical topology of a device, with additional emphasis on port information. Data is pulled from multiple places including slot and port details (Entity, ifTable), default role (Policy), neighbor link details (CDP, EDP, LLDP), Ethernet Automatic Protection Switching (EAPS), and Multi System Link Aggregation (MLAG).
Changing a value from the system default causes a Default Value button to appear. Selecting this button changes the field back to the system default value.
The cache is maintained in a two-tiered structure: device physical data is cached to the database and a fast in-memory cache maintains a subset of this data in memory on the server. The in-memory cache can contain all or a subset of devices stored in the database.
On the specified polling interval, the data is validated and automatically updated as necessary. Decreasing the poll interval increases background SNMP performed by the server.
Storing this information greatly improves performance for views in ExtremeCloud IQ Site Engine that request it. Enable the cache for the best experience.
Monitor Cache
- Enable Network Monitor Cache
- Select this option to enable the network monitor cache. Enabling the cache improves performance for ExtremeCloud IQ Site Engine views that request this information. Deselecting this option disables all other fields in this panel.
- Enable In-Memory Caching
- Select this option to enable the in-memory cache. To limit memory usage, disable the in-memory cache and configure the device cache to rely directly on the database.
- Maximum In-Memory Cache Size (devices)
- If Enable In-Memory Caching is enabled, enter the maximum number of devices whose data is stored in the in-memory cache. This option lets you adjust the amount of memory the cache uses.
- Data Polling Interval
- Enter the frequency that the device data is checked for changes. If the device data is stale, the data is refreshed in the cache. Reducing the interval increases background SNMP queries performed by the server.
- Maximum SNMP Worker Threads
- Enter the maximum number of threads that send SNMP queries in parallel if multiple devices are added to the cache at the same time. The cache is populated with results from SNMP queries to devices.
Network Monitor Trap Refresh
- Ignore IP Addresses (comma separated)
- Enter a comma-separated list of the IP addresses for which you do not want ExtremeCloud IQ Site Engine to be the trap destination.
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