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 ERS 4900 OID for "Dropped On No Resources"

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EF's profile image
EF posted 09-14-2021 07:31

Hi team!!!

I´m looking for OID to monitoring “Dropped On No Resources” packets discards on ERS4900 switches and I found:

 

- if in discards (1.3.6.1.2.1.2.2.1.13) --> The number of inbound packets which were chosen to be discarded even though no errors had been detected to prevent their being deliverable to a higher-layer protocol. One possible reason for discarding such a packet could be to free up buffer space. Discontinuities in the value of this counter can occur at re-initialization of the management system, and at other times as indicated by the value of ifCounterDiscontinuityTime.

- if out discards (1.3.6.1.2.1.2.2.1.19) --> The number of outbound packets which were chosen to be discarded even though no errors had been detected to prevent their being transmitted. One possible reason for discarding such a packet could be to free up buffer space. Discontinuities in the value of this counter can occur at re-initialization of the management system, and at other times as indicated by the value of ifCounterDiscontinuityTime.

 

Are these dropped packets include on this counters or there is an specific OID for that?

 

Regards

 

EF

 

Todd Hancock's profile image
Todd Hancock

Hi, 

Dropped on No Resource are counted under Out Discards, but there is also a separate MIB for them.bayStackStatsIfNoResourcesPktsDropped - 1.3.6.1.4.1.45.5.12.1.1.1.2

Ludovico Stevens's profile image
Ludovico Stevens
I would not use the Dropped on No resources counter, as it only clocks up packets dropped on the best effort queue.
ERS introduced proper QoS egress queue stats in these releases:

ERS5900
7.0.0	SW	QoS egress queue statistics (show qos queue-statistics [port <port_list>] [queue <queue>] [non-zero]; qos clear-queue-stats [port <port_list>] [queue <queue>])
7.0.0	SW	SNMP & MIB Support for QoS egress queue statistics
7.0.0	SW	EDM support for QOS egress queue statistics
ERS4900
7.1.0	SW	QoS egress queue statistics (show qos queue-statistics [port <port_list>] [queue <queue>] [non-zero]; qos clear-queue-stats [port <port_list>] [queue <queue>])
7.1.0	SW	SNMP & MIB Support for QoS egress queue statistics
7.1.0	SW	EDM support for QOS egress queue statistics
ERS4500 / ERS4800
5.8.0	SW	QoS egress queue statistics (show qos queue-statistics [port <port_list>] [queue <queue>] [non-zero]; qos clear-queue-stats [port <port_list>] [queue <queue>])
5.9.0	SW	SNMP & MIB Support for QoS egress queue statistics
5.9.0	SW	EDM support for QOS egress queue statistics

I think the MIBs are these:

bayStackStatsCoSQueueTable .1.3.6.1.4.1.45.5.12.1.3
bayStackStatsCoSQueueEntry .1.3.6.1.4.1.45.5.12.1.3.1
bayStackStatsCoSQueueIfIndex .1.3.6.1.4.1.45.5.12.1.3.1.1
bayStackStatsCoSQueueQueue .1.3.6.1.4.1.45.5.12.1.3.1.2
bayStackStatsCoSQueueOutPackets .1.3.6.1.4.1.45.5.12.1.3.1.3
bayStackStatsCoSQueueOutBytes .1.3.6.1.4.1.45.5.12.1.3.1.4
bayStackStatsCoSQueueDropPackets .1.3.6.1.4.1.45.5.12.1.3.1.5
bayStackStatsCoSQueueDropBytes .1.3.6.1.4.1.45.5.12.1.3.1.6
bayStackStatsCoSQueueClear .1.3.6.1.4.1.45.5.12.1.3.1.7