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Requesting a Previous (Rollback) Configuration

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):



<rpc>
    <get-rollback-information> 

        <rollback>index-number</rollback> 

    </get-rollback-information> 

</rpc>
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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 Information from the Committed or Candidate Configuration.



<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:



<rpc>
    <get-rollback-information> 

        <rollback>index-number</rollback> 

        <format>text</format> 

    </get-rollback-information> 

</rpc>
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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 JUNOS 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 9.4R1 for the initial version of JUNOS Release 9.4.

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