All MIBs › ACD-PORT-MIB › acdPortRxStatsIgnored
acdPortRxStatsIgnored
Module: ACD-PORT-MIB
OID (symbolic): ACD-PORT-MIB::acdPortRxStatsIgnored
OID (numeric): 1.3.6.1.4.1.22420.2.9.1.3.2.1.21
Node type: OBJECT-TYPE
Type: Counter64
Access: read-only
Description: This is a count of the number of received packets that have been ignored by this port. A packet is ignored if it violates the programmed preamble rules or it violates the minimum data gap. The preamble rules include long preamble enforcement (greater than 23 nibbles) and pure preamble enforcement (only 55h bytes). The minimum data gap is the time between packet data transfers and is measured from immediately after the last CRC byte of the previous packet through the SFD field of the current packet. The normal data gap is 20 bytes long (12 bytes of IPG and 8 bytes of preamble/SFD). The enforcement limit is set to 10 bytes (half the normal gap length).
What is acdPortRxStatsIgnored?
This counter tracks packets discarded by the port due to invalid preamble patterns or insufficient gaps between frames. Network engineers monitor this metric to detect non-compliant devices or extreme congestion that violates Ethernet timing rules. A value of 5,000 ignored packets per day might indicate a nearby device that isn't following Ethernet standards or a severely congested link.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.4.1.22420.2.9.1.3.2.1.21 snmpwalk -v2c -c public <target> ACD-PORT-MIB::acdPortRxStatsIgnored
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.4.1.22420.2.9.1.3.2.1.21.1 snmpget -v2c -c public <target> ACD-PORT-MIB::acdPortRxStatsIgnored.1
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OID Breakdown
Upper-level ancestors (8 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 |
| 1.3.6.1.4.1.22420 | accedianMIB | ACCEDIAN-SMI |
| 1.3.6.1.4.1.22420.2 | acdMibs | ACCEDIAN-SMI |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.4.1.22420.2.9 | acdPort | ACD-PORT-MIB |
| 1.3.6.1.4.1.22420.2.9.1 | acdPortMIBObjects | ACD-PORT-MIB |
| 1.3.6.1.4.1.22420.2.9.1.3 | acdPortStats | ACD-PORT-MIB |
| 1.3.6.1.4.1.22420.2.9.1.3.2 | acdPortRxStatsTable | ACD-PORT-MIB |
| 1.3.6.1.4.1.22420.2.9.1.3.2.1 | acdPortRxStatsEntry | ACD-PORT-MIB |
| 1.3.6.1.4.1.22420.2.9.1.3.2.1.21 | acdPortRxStatsIgnored | ACD-PORT-MIB |