How to Observe IPMP Probes

Use this procedure to observe ongoing probes. When you issue the command to observe probes, information about probe activity on the system is continuously displayed until you terminate the command with Ctrl-C. You must have Primary Administrator privileges to run this command.

1. Assume the role of Primary Administrator, or become superuser.

   The Primary Administrator role includes the Primary Administrator profile. To create the role and assign the role to a user, see Chapter 2, Working With the Solaris Management Console (Tasks), in System Administration Guide: Basic Administration.

2. Display the information about ongoing probes.

   # ipmpstat -pn TIME INTERFACE PROBE TARGET NETRTT RTT RTTAVG RTTDEV 0.11s subitops0 589 192.168.85.1 0.51ms 0.76ms 0.76ms -- 0.17s hme1 612 192.1.2.1 -- -- -- -- 0.25s fops0 602 128.0.0.1 0.61ms 1.10ms 1.10ms -- 0.26s fops1 602 128.0.0.2 -- -- -- -- 0.25s fops2 601 128.0.0.1 0.62ms 1.20ms 1.00ms -- 0.26s fops3 603 128.0.0.1 0.79ms 1.11ms 1.10ms -- 1.66s hme1 613 192.1.2.1 -- -- -- -- 1.70s subitops0 603 192.168.85.3 0.63ms 1.10ms 1.10ms -- ^C

   TIME

   Specifies the time a probe was sent relative to when the ipmpstat command was issued. If a probe was initiated prior to ipmpstat being started, then the time is displayed with a negative value, relative to when the command was issued.

   PROBE

   Specifies the identifier that represents the probe.

   INTERFACE

   Specifies the interface on which the probe is sent.

   TARGET

   Specifies the hostname or, if the -n option is used in conjunction with -p, the target address to which the probe is sent.

   NETRTT

   Specifies the total network round-trip time of the probe and is measured in milliseconds. NETRTT covers the time between the moment when the IP module sends the probe and the moment the IP module receives the ack packets from the target. If the in.mpathd daemon has determined that the probe is lost, then the field will be empty.

   RTT

   Specifies the total round-trip time for the probe and is measured in milliseconds. RTT covers the time between the moment the daemon executes the code to send the probe and the moment the daemon completes processing the ack packets from the target. If the in.mpathd daemon has determined that the probe is lost, then the field will be empty. Spikes that occur in the RTT which are not present in the NETRTT might indicate that the local system is overloaded.

   RTTAVG

   Specifies the probe's average round-trip time over the interface between local system and target. The average round-trip time helps identify slow targets. If data is insufficient to calculate the average, this field will be empty.

   RTTDEV

   Specifies the standard deviation for the round-trip time to the target over the interface. The standard deviation helps identify jittery targets whose ack packets are being sent erratically. For jittery targets, the in.mpathd daemon is forced to increase the failure detection time. Consequently, the daemon would take a longer time before it can detect such a target's outage. If data is insufficient to calculate the standard deviation, this field will be empty.