The Interfaces Group MIB (ifMIB) is specified in RFC 2863. Extreme 9920 software supports the following.
| Name | OID | Syntax | Description |
| ifNumber | .1.3.6.1.2.1.2.1 | Integer32 | Number of network interfaces on the system |
| ifIndex | .1.3.6.1.2.1.2.2.1.1 | InterfaceIndex | Value between 1 and the value of the ifNumber |
| ifDescr | .1.3.6.1.2.1.2.2.1.2 | DisplayString (Octet string) | Description of the interface |
| ifType | .1.3.6.1.2.1.2.2.1.3 | IANAifType | |
| ifMtu | .1.3.6.1.2.1.2.2.1.4 | Integer32 | Size of the largest packet that can be sent or received on the interface |
| ifSpeed | .1.3.6.1.2.1.2.2.1.5 | Gauge32 | Estimation of the interface bandwidth in bits per second |
| ifPhysAddress | .1.3.6.1.2.1.2.2.1.6 | PhysAddress(Octet string) | Interface address at the protocol sub-layer |
| ifAdminStatus | .1.3.6.1.2.1.2.2.1.7 | Integer | Administrative state of the interface: up (1), down (2), testing (3) |
| ifOperStatus | .1.3.6.1.2.1.2.2.1.8 | Integer | Operational state of the interface: up (1), down (2), testing (3), unknown (4), dormant (5), not present (6) lower layer down (7) |
| ifLastChange | .1.3.6.1.2.1.2.2.1.9 | TimeTicks | Value of sysUpTime when the interface entered the current operational state |
| ifInOctets | .1.3.6.1.2.1.2.2.1.10 | Counter32 | Number of octets received on the interface |
| ifInUcastPkts | .1.3.6.1.2.1.2.2.1.11 | Counter32 | Number of unicast packets delivered by the sublayer to a higher sublayer |
| ifInNUcastPkts | .1.3.6.1.2.1.2.2.1.12 | Counter32 | Number of multicast or broadcast packets delivered by the sublayer to a higher sublayer |
| ifInDiscards | .1.3.6.1.2.1.2.2.1.13 | Counter32 | Number of discarded inbound packets |
| ifInErrors | .1.3.6.1.2.1.2.2.1.14 | Counter32 | Number of inbound packets containing errors that prevented delivery to a higher-layer protocol |
| ifInUnknownProtos | .1.3.6.1.2.1.2.2.1.15 | Counter32 | Number of packets received from the interface that were discarded for an unknown or unsupported protocol |
| ifOutOctets | .1.3.6.1.2.1.2.2.1.16 | Counter32 | Number of octets sent from the interface |
| ifOutUcastPkts | .1.3.6.1.2.1.2.2.1.17 | Counter32 | Number of packets requested by a higher-level protocol that were addressed to a unicast address |
| ifOutNUcastPkts | .1.3.6.1.2.1.2.2.1.18 | Counter32 | Number of packets requested by a higher-level protocol that were addressed to a multicast or broadcast address |
| ifOutDiscards | .1.3.6.1.2.1.2.2.1.19 | Counter32 | Number of discarded outbound packets |
| ifOutErrors | .1.3.6.1.2.1.2.2.1.20 | Counter32 | Number of outbound packets containing errors that prevented transmission |
| ifOutQLen | .1.3.6.1.2.1.2.2.1.21 | Gauge32 | Length of the outbound packet queue |
| ifSpecific | .1.3.6.1.2.1.2.2.1.22 | Object Identifier | OID of the MIB |