AT-QOS-MIB

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Organization: Allied Telesis, Inc

Last Updated: 2004-12-01

Category: Quality of Service, Vendor: Allied Telesis

Description: Manages Quality of Service policy maps, traffic classification, and queuing parameters on Allied Telesis network devices.

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What Is AT-QOS-MIB?

AT-QOS-MIB manages Quality of Service policy maps, traffic classification, and queuing parameters across Allied Telesis switch families with QoS-capable silicon. It exposes configuration tables mapping switch ports to QoS policies, and policy definitions covering traffic-class bandwidth, drop, and marking behavior. Its monitoring emphasis is on software/configuration status rather than raw hardware faults: confirming which policy is bound to each port and whether default bandwidth-class drop or mark thresholds are set as intended, which reveals a QoS misconfiguration that would let low-priority traffic starve higher-priority flows during congestion. It is a generic module intended to work across a number of Allied Telesis switch families and specific models sharing common QoS silicon. It is deployed on Allied Telesis switches carrying converged voice, video, and data traffic that requires QoS enforcement. Engineers can download the AT-QOS-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in AT-QOS-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

Allied Telesis switches (QoS-capable ATR silicon models)

Monitoring Examples

qosSwitchPortTable/qosSwitchPortEntry maps qosSwitchPortIndex to a qosSwitchPortPolicyIndex, which references qosSwitchPolicyTable/qosSwitchPolicyEntry entries carrying qosSwitchPolicyDescription and thresholds like qosSwitchPolicyDefaultTCDropBWClass3 and qosSwitchPolicyDefaultTCMarkValue. An administrator would poll qosSwitchPortPolicyIndex to confirm each port is bound to the correct policy, and check qosSwitchPolicyDefaultTCDropBWClass3 to verify low-priority traffic is actually being dropped as intended once the link approaches congestion.

What Can Be Monitored

per-port QoS policy assignment
policy bandwidth-class thresholds
traffic-class drop/mark settings
policy description/identity

Imported Objects

From AT-SMI-MIB

modules

OBJECT-IDENTITY

From SNMPv2-SMI

Counter32
Counter64
Gauge32
Integer32
MODULE-IDENTITY
OBJECT-TYPE

From SNMPv2-TC

DisplayString

How to Use in IPNetwork Monitor

Example using qosSwitch8948PortDefaultTCCountersAggregateBytes OID:

Select an Allied Telesis managed switch or router 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 qosSwitch8948PortDefaultTCCountersAggregateBytes 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 total number of bytes classified by the default traffic class on this port. 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 sharply between polls relative to its normal baseline, since an unexpected spike often reflects a real change in traffic or activity. Click Finish to create the monitor; you can adjust any parameter later.

OIDs

OID symbolic	OID numeric	Type	Access	Description
qos	1.3.6.1.4.1.207.8.4.4.4.99			This MIB file contains definitions of managed objects for the handling QoS on Allied Telesis switches. There are a number of tables designed to be generic to all ATR switches supporting QoS in silicon, and well as tables for specific AT switches or switch familes.
qosSwitch	1.3.6.1.4.1.207.8.4.4.4.99.1
qosSwitchPortTable	1.3.6.1.4.1.207.8.4.4.4.99.1.1		not-accessible	Generic port configuration for QoS, indexed by port index.
qosSwitchPortEntry	1.3.6.1.4.1.207.8.4.4.4.99.1.1.1		not-accessible	A single switch port entry for QoS.
I32 qosSwitchPortIndex	1.3.6.1.4.1.207.8.4.4.4.99.1.1.1.1	Integer32	not-accessible	Port index of the port entry. This index is the same port number used in CLI commands, and the same index as appears in other MIB tables related to switch ports.
I32 qosSwitchPortPolicyIndex	1.3.6.1.4.1.207.8.4.4.4.99.1.1.1.2	Integer32	read-only	Policy index of the policy for this port. Policy index numbers for CLI commands start at 0, while SNMP indexes must start at 1. This means that the policy index in this MIB variable is 1 more than the index for the same policy as entered for CLI commands.
qosSwitchPolicyTable	1.3.6.1.4.1.207.8.4.4.4.99.1.2		not-accessible	QoS policy configuration, indexed by policy index.
qosSwitchPolicyEntry	1.3.6.1.4.1.207.8.4.4.4.99.1.2.1		not-accessible	A policy entry containing configuration information for a single policy.
I32 qosSwitchPolicyIndex	1.3.6.1.4.1.207.8.4.4.4.99.1.2.1.1	Integer32	not-accessible	The index of this policy entry. Policy index numbers for CLI commands start at 0, while SNMP indexes must start at 1. This means that the policy index in this MIB variable is 1 more than the index for the same policy as entered for CLI commands.
OCT qosSwitchPolicyDescription	1.3.6.1.4.1.207.8.4.4.4.99.1.2.1.2	OCTET STRING	read-only	An optional description for the policy, as entered via the CLI.
INT qosSwitchPolicyDefaultTCDropBWClass3	1.3.6.1.4.1.207.8.4.4.4.99.1.2.1.3	INTEGER	read-only	Specifies whether traffic that exceeds the bandwidth for the default traffic class be dropped or not. The bandwidth limit is the combined total of the variables qosSwitchPolicyDefaultTCMaxBandwidth and qosSwitchPolicyDefaultTCMaxBurstSize. A value of yes(1) indicates that traffic exceeding the bandwidth limit is dropped immediately. A value of no(0) indicates that the excess traffic is marked as bandwidth class 3 and is therefore eligible for dropping by the RED curve settings.
INT qosSwitchPolicyDefaultTCIgnoreBWClass	1.3.6.1.4.1.207.8.4.4.4.99.1.2.1.4	INTEGER	read-only	Specifies whether the traffic metering stage acknowledges any bandwidth class assigned to flows processed by the default traffic class. If set to yes(1), previously assigned bandwidth classes will be ignored will be ignored and the bandwidth class of the traffic will be set according to the meter conformance level of the flow.
I32 qosSwitchPolicyDefaultTCMarkValue	1.3.6.1.4.1.207.8.4.4.4.99.1.2.1.5	Integer32	read-only	When the qosSwitchPolicyDefaultTCPremarking variable is set to usemarkvalue(1), this variable specifies the index into the DSCP MAP table to use for remarking. A value in the range 0 to 63 indicates the DSCP to use, the value 256 indicates that no DSCP value has been defined for the default traffic class for this policy.
I32 qosSwitchPolicyDefaultTCMaxBandwidth	1.3.6.1.4.1.207.8.4.4.4.99.1.2.1.6	Integer32	read-only	Specifies the maximum bandwidth available to the default traffic class. Traffic under this bandwidth will be designated as bandwidth class 2. The value 2147483647 indicates that there is no limit on the maximum bandwidth for the default traffic class for this policy.
I32 qosSwitchPolicyDefaultTCMaxBurstSize	1.3.6.1.4.1.207.8.4.4.4.99.1.2.1.7	Integer32	read-only	Specifies the maximum bandwidth above the bandwidth specified by qosSwitchPolicyDefaultTCMaxBandwidth before traffic is marked as bandwidth class 3.
I32 qosSwitchPolicyDefaultTCMinBandwidth	1.3.6.1.4.1.207.8.4.4.4.99.1.2.1.8	Integer32	read-only	Specifies the minimum bandwidth reserved for the default traffic class. Traffic under this bandwidth will be marked as bandwidth class 1. The value 2147483647 indicates that there is no limit on the minimum bandwidth for the default traffic class for this policy.
I32 qosSwitchPolicyDefaultTCMinBurstSize	1.3.6.1.4.1.207.8.4.4.4.99.1.2.1.9	Integer32	read-only	Specifies the maximum amount of data above the bandwidth specified in the variable qosSwitchPolicyDefaultTCMinBandwidth before traffic is marked as bandwidth class 2.
INT qosSwitchPolicyDefaultTCPremarking	1.3.6.1.4.1.207.8.4.4.4.99.1.2.1.10	INTEGER	read-only	Specifies the QoS action to take on traffic in the default traffic class before metering actions are taken. If none(0) is specified, the traffic is passed to the metering stage. If usemarkvalue(1) is specified, the QoS settings are taken from the variable qosSwitchPolicyDefaultTCMarkValue used as an index into the DCSP MAP table. If usedscp(2) is specified, the DSCP value in the data frames is used as an index into the DSCP MAP table.
INT qosSwitchPolicyDefaultTCRemarking	1.3.6.1.4.1.207.8.4.4.4.99.1.2.1.11	INTEGER	read-only	Specifies the action to take after the metering stage for traffic in the default traffic class. The metering stage assigns a temporary value of bandwidth class to the flow which is used to determine its per-hop behaviour. If this variable is set to bwclass(2) or bwclass-priority(4), the temporary bandwidth class becomes the new bandwidth class for the flow. If priority(3) or bwclass-priority(4) is specified, the currently assigned queue for frames in this traffic class is used in conjunction with the temporary bandwidth class to determine the new value of the VLAN Tag User Priority field. If usedscpmap(1) is specified, the temporary value is used (in conjunction with the DSCP of the frame) as an index into the DSCP MAP table, which then assigns the actual, new values for bandwidth class, DSCP, Egress Queue and VLAN Tag User Priority. A value of none(0) for this variable means that no remarking of the packet is done after the metering stage.
qosSwitchTrafficClassTable	1.3.6.1.4.1.207.8.4.4.4.99.1.3		not-accessible	Traffic class configuration, indexed by traffic class index.
qosSwitchTrafficClassEntry	1.3.6.1.4.1.207.8.4.4.4.99.1.3.1		not-accessible	A traffic class entry containing configuration information for a single traffic class.
I32 qosSwitchTrafficClassIndex	1.3.6.1.4.1.207.8.4.4.4.99.1.3.1.1	Integer32	not-accessible	The index of this traffic class entry. Traffic class index numbers for CLI commands start at 0, while SNMP indexes must start at 1. This means that the traffic class index in this MIB variable is 1 more than the index for the same traffic class as entered for CLI commands.
I32 qosSwitchTrafficClassPolicyNumber	1.3.6.1.4.1.207.8.4.4.4.99.1.3.1.2	Integer32	read-only	Policy index of the policy to which this traffic class belongs. Policy index numbers for CLI commands start at 0, while SNMP indexes must start at 1. This means that the policy index in this MIB variable is 1 more than the index for the same policy as entered for CLI commands. A value of 0 for this variable means that the traffic class has not been added to a policy yet.
OCT qosSwitchTrafficClassDescription	1.3.6.1.4.1.207.8.4.4.4.99.1.3.1.3	OCTET STRING	read-only	An optional description for this traffic class.
INT qosSwitchTrafficClassDropBWClass3	1.3.6.1.4.1.207.8.4.4.4.99.1.3.1.4	INTEGER	read-only	Specifies whether traffic that exceeds the bandwidth for this traffic class be dropped or not. The bandwidth limit is the combined total of the variables qosSwitchTrafficClassMaxBandwidth and qosSwitchTrafficClassMaxBurstSize A value of yes(1) indicates that traffic exceeding the bandwidth limit is dropped immediately. A value of no(0) indicates that the excess traffic is marked as bandwidth class 3 and is therefore eligible for dropping by the RED curve settings.
INT qosSwitchTrafficClassIgnoreBWClass	1.3.6.1.4.1.207.8.4.4.4.99.1.3.1.5	INTEGER	read-only	Specifies whether the traffic metering stage acknowledges any bandwidth class assigned to flows processed by this traffic class. If set to yes(1), previously assigned bandwidth classes will be ignored will be ignored and the bandwidth class of the traffic will be set according to the meter conformance level of the flow.
I32 qosSwitchTrafficClassMarkValue	1.3.6.1.4.1.207.8.4.4.4.99.1.3.1.6	Integer32	read-only	When the qosSwitchTrafficClassPremarking variable is set to usemarkvalue(1), this variable specifies the index into the DSCP MAP table to use for remarking. A value in the range 0 to 63 indicates the DSCP to use, the value 256 indicates that no DSCP value has been defined for this traffic class.
I32 qosSwitchTrafficClassMaxBandwidth	1.3.6.1.4.1.207.8.4.4.4.99.1.3.1.7	Integer32	read-only	Specifies the maximum bandwidth available to this traffic class. Traffic under this bandwidth will be designated as bandwidth class 2. The value 2147483647 indicates that there is no limit on the maximum bandwidth for this traffic class.
I32 qosSwitchTrafficClassMaxBurstSize	1.3.6.1.4.1.207.8.4.4.4.99.1.3.1.8	Integer32	read-only	Specifies the maximum bandwidth above the bandwidth specified by qosSwitchTrafficClassMaxBandwidth before traffic is marked as bandwidth class 3.
I32 qosSwitchTrafficClassMinBandwidth	1.3.6.1.4.1.207.8.4.4.4.99.1.3.1.9	Integer32	read-only	Specifies the minimum bandwidth reserved for this traffic class. Traffic under this bandwidth will be marked as bandwidth class 1. The value 2147483647 indicates that there is no limit on the minimum bandwidth for this traffic class.
I32 qosSwitchTrafficClassMinBurstSize	1.3.6.1.4.1.207.8.4.4.4.99.1.3.1.10	Integer32	read-only	Specifies the maximum amount of data above the bandwidth specified in the variable qosSwitchTrafficClassMinBandwidth before traffic is marked as bandwidth class 2.
INT qosSwitchTrafficClassPremarking	1.3.6.1.4.1.207.8.4.4.4.99.1.3.1.11	INTEGER	read-only	Specifies the QoS action to take on traffic in this traffic class before metering actions are taken. If none(0) is specified, the traffic is passed to the metering stage. If usemarkvalue(1) is specified, the QoS settings are taken from the variable qosSwitchTrafficClassMarkValue used as an index into the DCSP MAP table. If usedscp(2) is specified, the DSCP value in the data frames is used as an index into the DSCP MAP table.
INT qosSwitchTrafficClassRemarking	1.3.6.1.4.1.207.8.4.4.4.99.1.3.1.12	INTEGER	read-only	Specifies the action to take after the metering stage for traffic in this traffic class. The metering stage assigns a temporary value of bandwidth class to the flow which is used to determine its per-hop behaviour. If this variable is set to bwclass(2) or bwclass-priority(3), the temporary bandwidth class becomes the new bandwidth class for the flow. If priority(3) or bwclass-priority(4) is specified, the currently assigned queue for frames in this traffic class is used in conjunction with the temporary bandwidth class to determine the new value of the VLAN Tag User Priority field. If usedscpmap(1) is specified, the temporary value is used (in conjunction with the DSCP of the frame) as an index into the DSCP MAP table, which then assigns the actual, new values for bandwidth class, DSCP, Egress Queue and VLAN Tag User Priority. A value of none(0) for this variable means that no remarking of the packet is done after the metering stage.
qosSwitch8948	1.3.6.1.4.1.207.8.4.4.4.99.1.4
qosSwitch8948PortTable	1.3.6.1.4.1.207.8.4.4.4.99.1.4.1		not-accessible	Port configuration, indexed by port index.
qosSwitch8948PortEntry	1.3.6.1.4.1.207.8.4.4.4.99.1.4.1.1		not-accessible	A single switch port entry.
C64 qosSwitch8948PortDefaultTCCountersAggregateBytesEx	1.3.6.1.4.1.207.8.4.4.4.99.1.4.1.1.1	Counter64	read-only	The total number of bytes classified by the default traffic class on this port.
C64 qosSwitch8948PortDefaultTCCountersBwConformanceClass1Bytes	1.3.6.1.4.1.207.8.4.4.4.99.1.4.1.1.2	Counter64	read-only	The number of bytes classified by the default traffic class on this port conforming to bandwidth class 1.
C64 qosSwitch8948PortDefaultTCCountersBwConformanceClass2Bytes	1.3.6.1.4.1.207.8.4.4.4.99.1.4.1.1.3	Counter64	read-only	The number of bytes classified by the default traffic class on this port conforming to bandwidth class 2.
C64 qosSwitch8948PortDefaultTCCountersBwConformanceClass3Bytes	1.3.6.1.4.1.207.8.4.4.4.99.1.4.1.1.4	Counter64	read-only	The number of bytes classified by the default traffic class on this port conforming to bandwidth class 3.
C64 qosSwitch8948PortDefaultTCCountersDroppedBytes	1.3.6.1.4.1.207.8.4.4.4.99.1.4.1.1.5	Counter64	read-only	The number of bytes dropped by the default traffic class on this port.
G32 qosSwitch8948PortQueueLength	1.3.6.1.4.1.207.8.4.4.4.99.1.4.1.1.6	Gauge32	read-only	The total number of packets currently queued for transmission on this port.
G32 qosSwitch8948PortQueue0Length	1.3.6.1.4.1.207.8.4.4.4.99.1.4.1.1.7	Gauge32	read-only	The number of packets currently queued for transmission on this port in queue 0. The numbering of queues indicates the priority of handling the traffic in that queue, with the higher queue number getting higher priority. The priority values in packets are mapped to queues via a priority to queue mapping. The default priority to queue mapping is as follows: Priority Queue value number 7 7 6 6 5 5 4 4 3 3 2 1 1 0 0 2 This mapping allows the default priority value of 0 to map to a queue which is not the lowest priority queue, allowing traffic classes to be assigned a lower priority queue than the default.
G32 qosSwitch8948PortQueue1Length	1.3.6.1.4.1.207.8.4.4.4.99.1.4.1.1.8	Gauge32	read-only	The number of packets currently queued for transmission on this port in queue 1. See the description for qosSwitch8948PortQueue0Length to understand the meaning of queue numbers.
G32 qosSwitch8948PortQueue2Length	1.3.6.1.4.1.207.8.4.4.4.99.1.4.1.1.9	Gauge32	read-only	The number of packets currently queued for transmission on this port in queue 2. See the description for qosSwitch8948PortQueue0Length to understand the meaning of queue numbers.
G32 qosSwitch8948PortQueue3Length	1.3.6.1.4.1.207.8.4.4.4.99.1.4.1.1.10	Gauge32	read-only	The number of packets currently queued for transmission on this port in queue 3. See the description for qosSwitch8948PortQueue0Length to understand the meaning of queue numbers.
G32 qosSwitch8948PortQueue4Length	1.3.6.1.4.1.207.8.4.4.4.99.1.4.1.1.11	Gauge32	read-only	The number of packets currently queued for transmission on this port in queue 4. See the description for qosSwitch8948PortQueue0Length to understand the meaning of queue numbers.
G32 qosSwitch8948PortQueue5Length	1.3.6.1.4.1.207.8.4.4.4.99.1.4.1.1.12	Gauge32	read-only	The number of packets currently queued for transmission on this port in queue 5. See the description for qosSwitch8948PortQueue0Length to understand the meaning of queue numbers.
G32 qosSwitch8948PortQueue6Length	1.3.6.1.4.1.207.8.4.4.4.99.1.4.1.1.13	Gauge32	read-only	The number of packets currently queued for transmission on this port in queue 6. See the description for qosSwitch8948PortQueue0Length to understand the meaning of queue numbers.
G32 qosSwitch8948PortQueue7Length	1.3.6.1.4.1.207.8.4.4.4.99.1.4.1.1.14	Gauge32	read-only	The number of packets currently queued for transmission on this port in queue 7. See the description for qosSwitch8948PortQueue0Length to understand the meaning of queue numbers.
qosSwitch8948TrafficClassCountersTable	1.3.6.1.4.1.207.8.4.4.4.99.1.4.2		not-accessible	Traffic class counters indexed by port, policy and traffic class.
qosSwitch8948TrafficClassCountersEntry	1.3.6.1.4.1.207.8.4.4.4.99.1.4.2.1		not-accessible	A traffic class counters entry containing QOS counters for a particular port, policy and traffic class.
I32 qosSwitch8948TCCountersPortIndex	1.3.6.1.4.1.207.8.4.4.4.99.1.4.2.1.1	Integer32	not-accessible	The index of the port for this entry in the traffic class counter table. This index is the same as the port index in the port table and is the same as the port number of the port in user commands.
I32 qosSwitch8948TCCountersPolicyIndex	1.3.6.1.4.1.207.8.4.4.4.99.1.4.2.1.2	Integer32	not-accessible	The index of the policy for this entry in the traffic class counter table. Each port can only have one policy assigned at a time. Policy index numbers for CLI commands start at 0, while SNMP indexes must start at 1. This means that the policy index in this MIB variable is 1 more than the index for the same policy as entered for CLI commands.
I32 qosSwitch8948TCCountersTrafficClassIndex	1.3.6.1.4.1.207.8.4.4.4.99.1.4.2.1.3	Integer32	not-accessible	The index of the traffic class for this entry in the traffic class counter table. The index is one of the indices defined for traffic classes for this port and policy. Traffic class indices for CLI commands start at 0, while SNMP indices must start at 1. This means that the traffic class index in this MIB variable is 1 more than the index for the same traffic class as entered for CLI commands.
C32 qosSwitch8948TCCountersAggregateBytes	1.3.6.1.4.1.207.8.4.4.4.99.1.4.2.1.4	Counter32	read-only	The total number of bytes classified by this traffic class for this policy on this port.
C32 qosSwitch8948TCCountersBwConformanceClass1Bytes	1.3.6.1.4.1.207.8.4.4.4.99.1.4.2.1.5	Counter32	read-only	The number of bytes classified by this traffic class for this policy on this port conforming to bandwidth class 1.
C32 qosSwitch8948TCCountersBwConformanceClass2Bytes	1.3.6.1.4.1.207.8.4.4.4.99.1.4.2.1.6	Counter32	read-only	The number of bytes classified by this traffic class for this policy on this port conforming to bandwidth class 2.
C32 qosSwitch8948TCCountersBwConformanceClass3Bytes	1.3.6.1.4.1.207.8.4.4.4.99.1.4.2.1.7	Counter32	read-only	The number of bytes classified by this traffic class for this policy on this port conforming to bandwidth class 3.
C32 qosSwitch8948TCCountersDroppedBytes	1.3.6.1.4.1.207.8.4.4.4.99.1.4.2.1.8	Counter32	read-only	The number of bytes dropped by this traffic class for this policy on this port.

RFC description

Manages Quality of Service policies and port configuration on Allied Telesis switches.

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Download AT-QOS-MIB