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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 5Use 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 3/0Use 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.
- 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 3000Use 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.
