Jitter Measurement with Hardware Timestamping

Jitter is the difference in relative transit time between two consecutive probes.

You can timestamp the following RPM probes to improve the measurement of latency or jitter:

• ICMP ping
• ICMP ping timestamp
• UDP ping
• UDP ping timestamp

Note: The device supports hardware timestamping of UDP ping and UDP ping timestamp RPM probes only if the destination port is UDP-ECHO (port 7).

Timestamping takes place during the forwarding process of the device originating the probe (the RPM client), but not on the remote device that is the target of the probe (the RPM server).

The supported encapsulations on a device for timestamping are Ethernet including VLAN, synchronous PPP, and Frame Relay. The only logical interface supported is an lt services interface.

RPM probe generation with hardware timestamp can be retrieved through the SNMP protocol. To configure SNMP, see Configuring SNMP for Network Management.