All MIBs › CNT21-MIB › cnt2IfInUnknownProtos
cnt2IfInUnknownProtos
Module: CNT21-MIB
OID (symbolic): CNT21-MIB::cnt2IfInUnknownProtos
OID (numeric): 1.3.6.1.4.1.333.2.1.2.2.1.16
Node type: OBJECT-TYPE
Type: Counter32
Access: read-only
Description: The number of packets received via the interface which were discarded because of an unknown or unsupported protocol.
What is cnt2IfInUnknownProtos?
This Counter32 counts packets received on the interface that were discarded because of an unknown or unsupported protocol. An administrator uses a nonzero value here to detect unexpected protocol traffic arriving on a port that wasn't configured to handle it. For example, cnt2IfInUnknownProtos incrementing on an interface meant to carry only IP traffic could reveal stray legacy protocol frames still arriving.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.4.1.333.2.1.2.2.1.16 snmpwalk -v2c -c public <target> CNT21-MIB::cnt2IfInUnknownProtos
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.4.1.333.2.1.2.2.1.16.1 snmpget -v2c -c public <target> CNT21-MIB::cnt2IfInUnknownProtos.1
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OID Breakdown
Upper-level ancestors (9 from the standard OID tree / other modules)
| Numeric OID | Name | Module |
|---|---|---|
| 1 | iso | LANART-AGENT |
| 1.3 | org | AirPair-MIB |
| 1.3.6 | dod | AirPair-MIB |
| 1.3.6.1 | internet | AirPair-MIB |
| 1.3.6.1.4 | private | AirPair-MIB |
| 1.3.6.1.4.1 | enterprises | AirPair-MIB |
| 1.3.6.1.4.1.333 | cnt | CNT2-MIB |
| 1.3.6.1.4.1.333.2 | cnt2 | CNT2-MIB |
| 1.3.6.1.4.1.333.2.1 | cnt2Mib2 | CNT2-MIB |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.4.1.333.2.1.2 | cnt2Interfaces | CNT21-MIB |
| 1.3.6.1.4.1.333.2.1.2.2 | cnt2IfTable | CNT21-MIB |
| 1.3.6.1.4.1.333.2.1.2.2.1 | cnt2IfEntry | CNT21-MIB |
| 1.3.6.1.4.1.333.2.1.2.2.1.16 | cnt2IfInUnknownProtos | CNT21-MIB |