IF-MIB supports interface types (physical and logical)
and larger counters (64K) beyond those defined in MIB-II.
Use this MIB to monitor interface statistics in addition to those
that MIB-II provides. For example, to monitor the current bandwidth
of high-speed interfaces (greater than 2.2Gps) such as the 10G interfaces
of the PA-5000 Series firewalls, you must check the ifHighSpeed
object in IF-MIB instead of the ifSpeed object in MIB-II. IF-MIB
statistics can be useful when evaluating the capacity of your network.
Palo Alto Networks firewalls, Panorama, and WF-500 appliances
support only the ifXTable in IF-MIB, which provides interface information
such as the number of multicast and broadcast packets transmitted
and received, whether an interface is in promiscuous mode, and whether
an interface has a physical connector.