All MIBs › CIENA-CES-OAM-MIB › cienaCesOamDuplicateEventNotificationRx
cienaCesOamDuplicateEventNotificationRx
Module: CIENA-CES-OAM-MIB
OID (symbolic): CIENA-CES-OAM-MIB::cienaCesOamDuplicateEventNotificationRx
OID (numeric): 1.3.6.1.4.1.1271.2.3.5.1.1.1.1.18
Node type: OBJECT-TYPE
Type: Counter32
Access: read-only
Description: A count of the number of duplicate Event OAMPDUs received on this interface. Event notification OAMPDUs may be sent in duplicate to increase the probability of successfully being received, given the possibility that a frame may be lost in transit.
An Event Notification OAMPDU is indicated by a valid frame with (1) destination MAC address equal to that of the reserved MAC address for Slow Protocols (See 43B of [802.3ah]), (2) a lengthOrType field equal to the reserved type for Slow Protocols, (3) a Slow Protocols subtype equal to that of the subtype reserved for OAM, and (4) an OAMPDU code equal to the OAM Event code.
A duplicate Event Notification OAMPDU is indicated as an Event Notification OAMPDU with a Sequence Number field that is identical to the previously received Event Notification OAMPDU Sequence Number.
Discontinuities of this counter can occur at re-initialization of the management system, and at other times as indicated by the value of the ifCounterDiscontinuityTime.
What is cienaCesOamDuplicateEventNotificationRx?
This Counter32 (frames) counts duplicate Event OAMPDUs received on this interface, per its description, meaning the peer retransmitted the same event notification more than once to guard against loss in transit. Seeing duplicates arrive is itself evidence that the underlying transport experienced at least some loss risk from the peer's perspective, even if the ultimate notification got through. An engineer would compare this counter to cienaCesOamUniqueEventNotificationRx to compute how many retransmissions were needed per genuine event, as a rough proxy for link reliability as perceived by the remote OAM client.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.4.1.1271.2.3.5.1.1.1.1.18 snmpwalk -v2c -c public <target> CIENA-CES-OAM-MIB::cienaCesOamDuplicateEventNotificationRx
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.4.1.1271.2.3.5.1.1.1.1.18.1 snmpget -v2c -c public <target> CIENA-CES-OAM-MIB::cienaCesOamDuplicateEventNotificationRx.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 |
| 1.3.6.1.4.1.1271 | ciena | CIENA-SMI |
| 1.3.6.1.4.1.1271.2 | cienaCes | CIENA-SMI |
| 1.3.6.1.4.1.1271.2.3 | cienaCesStatistics | CIENA-SMI |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.4.1.1271.2.3.5 | cienaCesOamMibModule | CIENA-CES-OAM-MIB |
| 1.3.6.1.4.1.1271.2.3.5.1 | cienaCesOamMIB | CIENA-CES-OAM-MIB |
| 1.3.6.1.4.1.1271.2.3.5.1.1 | cienaCesOamStatistics | CIENA-CES-OAM-MIB |
| 1.3.6.1.4.1.1271.2.3.5.1.1.1 | cienaCesOamStatsTable | CIENA-CES-OAM-MIB |
| 1.3.6.1.4.1.1271.2.3.5.1.1.1.1 | cienaCesOamStatsEntry | CIENA-CES-OAM-MIB |
| 1.3.6.1.4.1.1271.2.3.5.1.1.1.1.18 | cienaCesOamDuplicateEventNotificationRx | CIENA-CES-OAM-MIB |