Monitored Interfaces

    What you are going to learn:

  • What are the default monitoring interfaces
  • How to monitor more interfaces
  • How to ignore some interfaces

A network device usually has many network interfaces. Some of them are physical network ports (such as the Ethernet copper or fiber ports) and some are logical interfaces (such as routed VLANs or VPNs).

Default Monitored Interfaces
Default Monitored Interfaces

By default, the monitoring agent will collect all the Ethernet interfaces (ifType 6 - ethernetCsmacd) and the Aggregate interfaces (ifType 54 - propMultiplexor & 161 - ieee8023adLag) that are available on the device. This sometimes includes some management interfaces if the device reports them as standard Ethernet interfaces.

Monitor More Interfaces
Monitor More Interfaces

If you want to monitor more than jusr the default interfaces, this can be configured in the Device Advanced Parameters. The option Interface SNMP types to collect is a list of comma-separated IANA ifTypes of the interfaces you want to collect. To collect all available interfaces, select the ifType 0 (zero).

Ignore Some Interfaces
Ignore Some Interfaces

If there are some interfaces you want to ignore during the collection (ex: some management interfaces), this can be configured in the Device Advanced Parameters. The option Interfaces SNMP Indexes to ignore is a list of comma-separated indexes of the interfaces you want to ignore. A range of indexes is also supported (ex: 1,2,3,10-13 will ignore 1, 2, 3, 10, 11, 12, 13).

How to determine the Interface Index and Interface Type?
How to determine the Interface Index and Interface Type?

To know the exact index for the interface you want to ignore, put your mouse over the interface name and the index number will be displayed in the tooltip.

How to select the monitored network interfaces