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Requesting a Previous (Rollback) Configuration

To request a previously committed (rollback) configuration, a client application emits the <get-rollback-information> and <rollback> tag elements 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>

The JUNOScript server encloses its response in <rpc-reply>, <rollback-information>, and <configuration> tag elements. The <load-success/> 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:junos="URL">
    <rollback-information>
        <load-success/>
        <configuration attributes>
            <!- - tag elements representing the complete previous configuration - ->
         </configuration>
    </rollback-information>
</rpc-reply>

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>

The JUNOScript server encloses its response in <rpc-reply>, <rollback-information>, <configuration-information>, and <configuration-output> tag elements. For more information about how ASCII output is formatted, see Requesting Output as Formatted ASCII Text or JUNOS XML Tag Elements.



<rpc-reply xmlns:junos="URL">
    <rollback-information>
        <load-success/>
        <configuration-information>
            <configuration-output>
                <!- - formatted ASCII text for the complete previous configuration - ->
            </configuration-output>
        </configuration-information>
    </rollback-information>
</rpc-reply>

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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