Requesting a Previous (Rollback) Configuration Using NETCONF
In a NETCONF session with a device running Junos OS, to request a previously committed (rollback) configuration, a client application emits the Junos XML <get-rollback-information> tag element and its child <rollback> tag element in an <rpc> tag element. This operation is equivalent to the show system rollback operational mode command. The <rollback> tag element specifies the index number of the previous configuration to display; its value can be from 0 (zero, for the most recently committed configuration) through 49.
To request Junos XML-tagged output, the application either includes the <format> tag element with the value xml or omits the <format> tag element (Junos XML tag elements are the default):
The NETCONF server encloses its response in <rpc-reply>, <rollback-information>, and <configuration> tag elements. The <ok/> tag is a side effect of the implementation and does not affect the results. For information about the attributes in the opening <configuration> tag, see Requesting Committed or Candidate Configuration Information Using NETCONF.
<rpc-reply xmlns="URN" xmlns:junos="URL">
<rollback-information>
<ok/>
<configuration attributes>
<!-- tag elements representing the complete previous configuration -->
</configuration>
</rollback-information>
</rpc-reply>
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To request formatted ASCII output, the application includes the <format> tag element with the value text:
The NETCONF server encloses its response in <rpc-reply>, <rollback-information>, <configuration-information>, and <configuration-output> tag elements. For more information about the formatted ASCII notation used in Junos configuration statements, see the CLI User Guide.
<rpc-reply xmlns="URN" xmlns:junos="URL">
<rollback-information>
<ok/>
<configuration-information>
<configuration-output>
/* formatted ASCII representing the complete previous configuration*/
</configuration-output>
</configuration-information>
</rollback-information>
</rpc-reply>
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The following example shows how to request Junos XML-tagged output for the rollback configuration that has an index of 2. In actual output, the Junos-version variable is replaced by a value such as 13.2R1 for the initial version of Junos OS Release 13.2.
