The SNMP Cisco CBQoS sensor monitors network parameters using Cisco's Class Based Quality of Service (CBQoS) via the Simple Network Management Protocol (SNMP).

i_round_blueThe sensor supports the classes Class Map, Match Statement, and Queueing.

SNMP Cisco CBQoS Sensor

SNMP Cisco CBQoS Sensor

i_square_cyanFor a detailed list and descriptions of the channels that this sensor can show, see section Channel List.

Sensor in Other Languages

  • Dutch: SNMP Cisco CBQoS
  • French: Cisco CBQoS (SNMP)
  • German: SNMP Cisco CBQoS
  • Japanese: SNMP Cisco CBQoS
  • Portuguese: CBQoS Cisco (SNMP)
  • Russian: SNMP Cisco CBQoS
  • Simplified Chinese: SNMP Cisco CBQoS
  • Spanish: CBQoS Cisco (SNMP)


Consider the following remarks and requirements for this sensor:




  • This sensor only supports IPv4.

Performance impact

  • This sensor has a very low performance impact.

Basic Sensor Settings

Basic Sensor Settings

Basic Sensor Settings

The sensor has the following default tags that are automatically predefined in the sensor's settings when you add the sensor:

  • cbqossensor

i_square_cyanFor more information about basic sensor settings, see section Sensor Settings.

Class Based QoS Specific

Class Based QoS Specific

Class Based QoS Specific



Object Type

The object type of the parameter that this sensor monitors.


The interface of the parameter that this sensor monitors.


The description of the parameter that this sensor monitors.


The number of available channels for the parameter that this sensor monitors.


The ObjectID of the parameter that this sensor monitors.


The ConfigID of the parameter that this sensor monitors.

Sensor Display

Sensor Display

Sensor Display



Primary Channel

Select a channel from the list to define it as the primary channel. In the device tree, PRTG displays the last value of the primary channel below the sensor's name. The available options depend on what channels are available for this sensor.

i_round_blueYou can set a different primary channel later by clicking b_channel_primary below a channel gauge on the sensor's Overview tab.

Graph Type

Define how this sensor shows different channels:

  • Show channels independently (default): Show a graph for each channel.
  • Stack channels on top of each other: Stack channels on top of each other to create a multi-channel graph. This generates a graph that visualizes the different components of your total traffic.
    i_round_redYou cannot use this option in combination with manual Vertical Axis Scaling (available in the channel settings).

Stack Unit

This setting is only visible if you select Stack channels on top of each other above.

Select a unit from the list. PRTG stacks all channels with this unit on top of each other. By default, you cannot exclude single channels from stacking if they use the selected unit. However, there is an advanced procedure to do so.

Inherited Settings

By default, all of these settings are inherited from objects that are higher in the hierarchy. We recommend that you change them centrally in the root group settings if necessary. To change a setting for this object only, click b_inherited_enabled under the corresponding setting name to disable the inheritance and to display its options.

i_square_cyanFor more information, see section Inheritance of Settings.

Channel List

i_round_blueWhich channels the sensor actually shows might depend on the target device, the available components, and the sensor setup.



Current Queue Depth

The current queue depth


In the channel table on the Overview tab, this channel never shows any values. PRTG uses this channel in graphs and reports to show the amount of time in which the sensor was in the Down status

Drop Packets

The number of drop packets

Drop Size

The drop size

Maximum Queue Depth

The maximum queue depth

No Buffer Drop Packets

The number of drop packets without buffer

Post Policy Size

The post policy size

Pre Policy Packets

The number of pre-policy packets

Pre Policy Size

The pre-policy size


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