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    Configuring the Probe Characteristics for RTR

    You can configure the probe characteristics presented in Table 1.

    Table 1: Probe Characteristics

    Characteristic

    Description

    frequency

    Time between tests (in seconds)

    hops-of-statistics-kept

    Hops per path for which statistics are gathered

    max-response-failure

    Maximum number of consecutive failures

    operations-per-hop

    Number of probes per hop

    owner

    Owner of the probe

    receive-interface

    Interface on which the probe expects to receive responses

    request-data-size

    Request’s payload size

    samples-of-history-kept

    Maximum number of history samples

    tag

    User-defined tag

    timeout

    Probe timeout (in milliseconds)

    tos

    A value for the TOS byte

    Note: You cannot set any of these characteristics until you have set the probe type using the type command. The default values of these characteristics depend on the type of the entry.

    To configure the probe characteristics:

    • Set the rate (in seconds) that the RTR probe uses to start a response time operation.
      host1(config-rtr)#frequency 90

      Use the no version to return to the default value, 60 seconds.

    • Set the number of hops per path for which statistics are collected. (For more information, see Capturing Statistics and Collecting Error Information for the RTR Probe.
      host1(config-rtr)#hops-of-statistics-kept 5

      Use the no version to set the default, 16 hops.

    • Set the maximum number of consecutive failures to respond to a probe’s request. (For more information, see Capturing Statistics and Collecting Error Information for the RTR Probe.
      host1(config-rtr)#max-response-failure 2

      Use the no version to set the default, 5 consecutive failures.

    • Set the number of RTR probe operations sent to a given hop.

      Note: You can apply this option only to a pathEcho type.

      host1(config-rtr)#operations-per-hop 5

      Use the no version to return to the default, 3.

    • Set the owner of the probe. If the SNMP agent is the owner of the probe, the owner’s name can begin with agent.
      host1(config-rtr)#owner 192.10.27.6 rtc.boston.com 555.1212

      Use the no version to return to the default, no owner.

    • Specify the interface on which the RTR probe expects to receive responses.

      Note: You must set this attribute when multiple RTR entries are configured to use the same target address. (For more information, see Setting the Receiving Interface for the RTR Entry).

      host1(config-rtr)#receive-interface fastEthernet 3/0

      Use the no version to restore the default value, which is to receive a response on any interface.

    • Set the protocol data size, in bytes, in the request packet.
      host1(config-rtr)#request-data-size 20

      Use the no version to return to the default value, 1 byte.

    • Set the maximum number of entries in the history table for each RTR probe. (For more information, see Collecting History for the RTR Probe).
      host1(config-rtr)#samples-of-history-kept 5

      Use the no version to set the default, 16 hops for pathEcho type, 1 hop for echo type.

    • Set an identifier for the probe.
      host1(config-rtr)#tag westford

      Use the no version to return to the default, no tag.

    • Set the time (in milliseconds) that the probe waits for a response. If you set the timeout to 0, no timeout is set.

      Note:

      • You can apply this option only to an echo type.
      • Do not set the value for timeout to more than the value set for frequency. If you do, the timeout value is ignored.
      host1(config-rtr)#timeout 3000

      Use the no version to return to the default value, 5000 milliseconds.

    • Set the type of service (ToS) byte in the probe’s IP header.
      host1(config-rtr)#tos 16

      Use the no version to return to the default value, 0. The default applies to both the echo and pathEcho types.

    Published: 2014-08-13