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Sets a time interval for updating the traceroute data for a traceprobe.
traceprobe refresh <time> no traceprobe refresh
Must be in active-measurement group configuration mode (config-engine-active), which requires privileged-level access.
Use once per active-measurement group
The traceprobe refresh command sets the interval between invocations of the traceprobe retries-per-hop process on behalf of a traceprobe type of active measurement probe.
Measurement data for a probe of type traceprobe is derived from the replies received from a traceroute packet. When you configure a probe of this type, the CNA am-scheduler process sends a traceroute packet to the probe target address. The HRTT that goes into the database is based on packet transit times between CNA and the closest address reached by the traceroute packet. (The traceprobe type of probe is designed to provide measurements for targets that are unreachable by tcp or icmp probes. See Chapter 4: Server-Based Measurement of the CNA Basic Monitoring Guide.)
But the traceroute command is costly--it can take several minutes to complete one probe. The CNA software caches the address of the last endpoint reached and begins probing that address directly. This is not reliable over an extended period of time, however, so the traceroute process must be invoked periodically, at the interval specified by the time parameter.
Use the no form of the command to reset the value of time to its default.
See also the active-measurement traceprobe avoid address (discontinued) command.
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