PRTG Manual: Cisco IP SLA Sensor

IPv4

This sensor only supports IPv4.

Performance impact

This sensor has a low performance impact.

Lookups

This sensor uses lookups to determine the status values of one or more channels.

Object identifiers (OID)

If the object identifiers (OID) that this sensor uses are not available on the target device, the sensor shows the error message: No such object (SNMP error # 222). If this occurs, open the SNMP Compatibility Options setting of the parent device or group and set the Request Mode to Use single get.

Sensor creation

If there is a very large number of IP SLAs available during sensor creation, we recommend that you limit the result set by using the Start Interface Index and End Interface Index options in the SNMP Compatibility Options setting of the parent device or group.

ID

The ID of the SLA that this sensor monitors.

This sensor can support the following operations with the specified type IDs:

• echo (1)
• pathEcho (2)
• fileIO (3)
• script (4)
• udpEcho (5)
• tcpConnect (6)
• http (7)
• dns (8)
• jitter (9)
• dlsw (10)
• dhcp (11)
• ftp (12)
• icmp-jitter (16)
• path-jitter (23)

The numbers are the IDs of the SLA types as reported by the target device. PRTG translates them into the corresponding strings. These IDs are independent of the IDs that you see in the Add Sensor dialog. If the target device returns other values, this sensor shows an error message that says that it cannot find the type.

Packet loss values are summarized but have no explicit channel for source-destination or destination-source values.

Type

The type of the SLA that this sensor monitors.

Name (Tag)

The name of the SLA that this sensor monitors.

Owner

The owner of the SLA that this sensor monitors.

Frequency

The frequency of the SLA that this sensor monitors.

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.

You can set a different primary channel later by clicking 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.
  You 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.

Avg. Jitter

The average jitter

Avg. Jitter Destination - Source

The average jitter between destination and source

Avg. Jitter Source - Destination

The average jitter between source and destination

Avg. Latency Destination - Source

The average latency between destination and source

Avg. Latency Source - Destination

The average latency between source and destination

Average Round Trip Time (RTT)

The average RTT

This channel is the primary channel by default.

Downtime

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.

ICPIF

The ICPIF

Late Packets

The number of late packets

Max. Latency Destination - Source

The maximum latency between destination and source

Max. Latency Source - Destination

The maximum latency between source and destination

Max. RTT

The maximum RTT

Min. Latency Destination - Source

The minimum latency between destination and source

Min. Latency Source - Destination

The minimum latency between source and destination

Min. RTT

The minimum RTT

MOS

The MOS

Packets Lost

The number of lost packets

Packets Lost %

The number of lost packets (%)

Packets Out of Sequence

The number of out-of-sequence packets