ARISTA-QUEUE-MIB

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Organization: Arista Networks, Inc.

Last Updated: 2014-08-15

Category: Vendor: Arista

Description: Monitors output queue depth, drop counters, and scheduling configuration on Arista EOS devices.

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What Is ARISTA-QUEUE-MIB?

ARISTA-QUEUE-MIB is a proprietary Arista Networks module generalizing ingress and egress interface queue counters across Arista's switch product line, noting that not every platform supports every counter/index defined. It exposes per-interface, per-queue tables tracking dropped packets and bytes on ingress, and packet counts by traffic type on egress, covering both admission-control drops and buffer-exhaustion drops where supported. This is a core performance/congestion monitoring module: rising drop counters on a specific queue reveal buffer exhaustion or scheduling problems causing packet loss under load. It is a self-contained EOS-specific extension without a direct standards dependency, though it parallels the general queuing concepts found in standards like DIFFSERV-MIB. It is deployed on Arista switches in any environment where queue-level congestion visibility is needed to diagnose microbursts or oversubscription. Network engineers evaluating or troubleshooting this functionality can download the ARISTA-QUEUE-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in ARISTA-QUEUE-MIB. Use the built-in SNMP Monitoring Browser to explore available variables, view their current values and descriptions, and select the objects you want to monitor. You can then create SNMP monitors, configure thresholds, and receive alerts when monitored values change.

Supported Devices

Arista Networks EOS switch

Monitoring Examples

An operator would poll aristaIngressQueueTable, indexed by aristaIngressIfIndex and aristaIngressQueueIndex, reading aristaIngressQueuePktsDropped and aristaIngressQueueBytesDropped to detect ingress buffer drops. On the egress side, aristaEgressQueueTable (indexed by aristaEgressIfIndex and aristaEgressQueueIndex) exposes aristaEgressQueuePkts broken down by aristaEgressPacketType. A sustained rise in aristaIngressQueuePktsDropped on a particular queue and interface, correlated with traffic bursts, would indicate that queue is undersized or misconfigured for the offered load, causing packet loss.

What Can Be Monitored

ingress queue packet/byte drops
egress queue packet counts by traffic type
per-interface, per-queue congestion indicators

Imported Objects

From ARISTA-SMI-MIB

aristaMibs

OBJECT-IDENTITY

From IF-MIB

InterfaceIndex

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

Counter64
Integer32
MODULE-IDENTITY
OBJECT-TYPE

From SNMPv2-TC

TEXTUAL-CONVENTION

How to Use in IPNetwork Monitor

Example using aristaIngressQueuePktsDropped OID:

Select an Arista Networks EOS switch as the target host to create a monitor — the SNMP service should be up and running on it. Click New Monitor, then check SNMP Custom on the Favorites tab, click Next, and confirm the host. On the next page, click Select... to open the built-in SNMP MIB Browser and type aristaIngressQueuePktsDropped into the Find box to locate it in the OID tree, selecting the specific row/instance you want to monitor since this is a table column, then select it and click OK. The number of dropped packets due to congestion at the ingress port in an interface. On the monitor's Main parameters page you can set the target's SNMP port (default 161), credentials, polling interval, and other settings — see the SNMP Monitor help for details. On the State conditions and Alerting tabs, configure when the monitor should change state and trigger an alert; since this is a Counter64-type OID, Value bounds is the most useful condition here — trigger an alert if the counter increases between polls, since a rising count of errors, failures, or discards often points to a real underlying problem. Click Finish to create the monitor; you can adjust any parameter later.

OIDs

OID symbolic	OID numeric	Type	Access	Description
aristaQueueMIB	1.3.6.1.4.1.30065.3.6			The MIB module is for managing interface queuing on Arista devices. Arista Networks has a number of products. This MIB generalizes ingress and egress queue counters supported on all Arista products. Therefore, a platform may not support all table indices and counters listed in this MIB. For example, ingressQueueIndex in aristaIngressQueueTable, aristaEgressQueuePktsDroppedQFull, aristaEgressQueuePktsDroppedNoBuffer, and aristaEgressQueueDropPrec in aristaEgressQueueTable are not supported in 7050 series switches.
aristaQueue	1.3.6.1.4.1.30065.3.6.1
aristaIngressQueueTable	1.3.6.1.4.1.30065.3.6.1.1		not-accessible	This table contains statistical information of the ingress queue in an interface.
aristaIngressQueueEntry	1.3.6.1.4.1.30065.3.6.1.1.1		not-accessible	A list of attributes of ingress queues in an interface. The attributes include dropped packets and dropped bytes of ingress queues.
NUM aristaIngressIfIndex	1.3.6.1.4.1.30065.3.6.1.1.1.1	InterfaceIndex	not-accessible	The index of an interface.
QUE aristaIngressQueueIndex	1.3.6.1.4.1.30065.3.6.1.1.1.2	QueueIndex	not-accessible	The index of ingress queues in the interface. In the case that the ingress queue information is the sum of the statistics of all ingress queues, the queueIndex is set as zero.
C64 aristaIngressQueuePktsDroppedEx	1.3.6.1.4.1.30065.3.6.1.1.1.3	Counter64	read-only	The number of dropped packets due to congestion at the ingress port in an interface.
C64 aristaIngressQueueBytesDropped	1.3.6.1.4.1.30065.3.6.1.1.1.4	Counter64	read-only	The number of dropped bytes due to congestion at the ingress port in an interface.
aristaEgressQueueTable	1.3.6.1.4.1.30065.3.6.1.2		not-accessible	This table contains statistical objects for the egress queues of an interface.
aristaEgressQueueEntry	1.3.6.1.4.1.30065.3.6.1.2.1		not-accessible	A list of statistical information of egress queues in an interface. The statistical information includes transmitted packets, transmitted bytes, dropped packets, and dropped bytes of egress queues.
NUM aristaEgressIfIndex	1.3.6.1.4.1.30065.3.6.1.2.1.1	InterfaceIndex	not-accessible	The index of an interface.
QUE aristaEgressQueueIndex	1.3.6.1.4.1.30065.3.6.1.2.1.2	QueueIndex	not-accessible	The index of egress queues in the interface.
PAC aristaEgressPacketType	1.3.6.1.4.1.30065.3.6.1.2.1.3	PacketType	not-accessible	The type of destination of packets in an egress queue in an interface.
C64 aristaEgressQueuePkts	1.3.6.1.4.1.30065.3.6.1.2.1.4	Counter64	read-only	The number of transmitted packets in the egress queue.
C64 aristaEgressQueueBytes	1.3.6.1.4.1.30065.3.6.1.2.1.5	Counter64	read-only	The number of transmitted bytes in the egress queue.
C64 aristaEgressQueuePktsDropped	1.3.6.1.4.1.30065.3.6.1.2.1.6	Counter64	read-only	The number of packets discarded from this egress queue.
C64 aristaEgressQueueBytesDropped	1.3.6.1.4.1.30065.3.6.1.2.1.7	Counter64	read-only	The number of bytes discarded from this egress queue.
C64 aristaEgressQueuePktsDroppedQFull	1.3.6.1.4.1.30065.3.6.1.2.1.8	Counter64	read-only	The number of packets discarded from this egress queue when the queue is full.
C64 aristaEgressQueuePktsDroppedNoBuffer	1.3.6.1.4.1.30065.3.6.1.2.1.9	Counter64	read-only	The number of packets discarded from this egress queue when there is no buffer.
DRO aristaEgressQueueDropPrec	1.3.6.1.4.1.30065.3.6.1.2.1.10	DropPrecedence	read-only	The drop precedence of packets in this egress queue.
aristaQueueCounterConformance	1.3.6.1.4.1.30065.3.6.2
aristaQueueCounterCompliances	1.3.6.1.4.1.30065.3.6.2.1
aristaQueueCounterCompliance	1.3.6.1.4.1.30065.3.6.2.1.1			The compliance statement for Arista switches that support queue counters.
aristaQueueCounterGroups	1.3.6.1.4.1.30065.3.6.2.2
aristaQueueCounterGroup	1.3.6.1.4.1.30065.3.6.2.2.1			The group of required objects in aristaIngressQueueTable and aristaEgressQueueTable.

RFC description

Arista EOS output queue depth, drop counters, and scheduling configuration monitoring.

Start monitoring Arista Networks EOS switches with a free 30-day trial of IPNetwork Monitor. Import MIBs, browse SNMP OIDs, create custom SNMP monitors, configure alerts, and monitor any SNMP-enabled network device from a single console.

Download ARISTA-QUEUE-MIB