close

keyboard_arrow_left

Table of Contents Expand all

play_arrow Overview
- play_arrow Junos Automation Scripts Overview
- play_arrow Junos XML Management Protocol and Junos XML API Overview
play_arrow Automation Scripting Using XSLT
- play_arrow XSLT Overview
- play_arrow Standard XPath and XSLT Functions Used in Automation Scripts
- play_arrow Standard XSLT Elements and Attributes Used in Automation Scripts
play_arrow Automation Scripting Using SLAX
- play_arrow SLAX Overview
- play_arrow SLAX Statements
- play_arrow The libslax Distribution for Automation Scripting
play_arrow Automation Scripting Using Python
- play_arrow Python Overview
play_arrow Automation Script Input
- play_arrow Global Parameters in Automation Scripts
  - Global Parameters and Variables in Junos OS Automation Scripts
play_arrow Extension Functions and Named Templates for Automation Scripts
play_arrow Manage Automation Scripts
- play_arrow Store and Enable Scripts
- play_arrow Configure a Remote Source for Scripts
- play_arrow Configure the Session Protocol for Scripts
  - Understanding the Session Protocol in Automation Scripts
  - Example: Specify the Session Protocol for a Connection within Scripts
- play_arrow Control Execution of Scripts
- play_arrow Synchronize Scripts Between Routing Engines
- play_arrow Convert Scripts Between SLAX and XSLT
  - Convert Scripts Between SLAX and XSLT
play_arrow Commit Scripts
- play_arrow Commit Scripts Overview
  - Commit Script Overview
  - How Commit Scripts Work
- play_arrow Create and Execute Commit Scripts
- play_arrow Generate a Custom Warning, Error, or System Log Message Using Commit Scripts
- play_arrow Generate Persistent or Transient Configuration Changes Using Commit Scripts
- play_arrow Create Custom Configuration Syntax with Commit Script Macros
- play_arrow Commit Script Examples
- play_arrow Junos XML and XSLT Tag Elements Used in Commit Scripts
- play_arrow Troubleshoot Commit Scripts
play_arrow Op Scripts
- play_arrow Op Scripts Overview
  - Op Script Overview
  - How Op Scripts Work
- play_arrow Create and Execute Op Scripts
- play_arrow Op Script Examples
- play_arrow Provision Services Using Service Template Automation
  - Service Template Automation Overview
  - Example: Configure Service Template Automation
- play_arrow Troubleshoot Op Scripts
  - Trace Op Script Processing on Devices Running Junos OS
  - Trace Script Processing on Devices Running Junos OS Evolved
play_arrow Event Policies and Event Scripts
play_arrow SNMP Scripts
- play_arrow SNMP Scripts Overview
  - SNMP Scripts Overview
- play_arrow Create and Execute SNMP Scripts
- play_arrow SNMP Script Example
  - Example: Process Unsupported OIDs with an SNMP Script
- play_arrow Troubleshoot SNMP Scripts
  - Trace SNMP Script Processing on Devices Running Junos OS
  - Trace Script Processing on Devices Running Junos OS Evolved
play_arrow Configuration Statements and Operational Commands
- Junos CLI Reference Overview

list Table of Contents

English

Example: Configure an Interior Gateway Protocol on an Interface

date_range 31-Jan-22

arrow_backward

arrow_forward

This commit script example uses a macro to automatically include an interface at the [edit protocols] hierarchy level and to configure the proper interior gateway protocol (IGP) on the interface.

Requirements

This example uses a device running Junos OS.

Overview and Commit Script

When you add a new interface to an OSPF or IS-IS domain, you must configure the interface at multiple hierarchy levels, including [edit interfaces] and [edit protocols]. This example uses a commit script and macro to automatically include the interface at the [edit protocols] hierarchy level and to configure the proper IGP on the interface, either OSPF or IS-IS, depending on the content of an apply-macro statement that you include in the interface configuration. This macro allows you to perform more configuration tasks at a single hierarchy level.

In this example, the Junos OS management (mgd) process inspects the configuration, looking for apply-macro statements. For each apply-macro ifclass statement included at the [edit interfaces interface-name unit logical-unit-number] hierarchy level, the script tests whether the role parameter is defined as cpe. If so, the script checks the igp parameter.

If the igp parameter is defined as isis, the script includes the relevant interface name at the [edit protocols isis interface] hierarchy level.

If the igp parameter is defined as ospf, the script includes the relevant interface name at the [edit protocols ospf area address interface] hierarchy level. For OSPF, the script references the area parameter to determine the correct subnet address of the area.

The example script is shown in both XSLT and SLAX syntax:

XSLT Syntax

content_copy zoom_out_map
<?xml version="1.0" standalone="yes"?>
<xsl:stylesheet version="1.0"
    xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
    xmlns:junos="http://xml.juniper.net/junos/*/junos"
    xmlns:xnm="http://xml.juniper.net/xnm/1.1/xnm"
    xmlns:jcs="http://xml.juniper.net/junos/commit-scripts/1.0">
    <xsl:import href="../import/junos.xsl"/>
 
    <xsl:template match="configuration">
        <xsl:for-each
                       select="interfaces/interface/unit/apply-macro[name = 'ifclass']">
            <xsl:variable name="role" select="data[name='role']/value"/>
            <xsl:variable name="igp" select="data[name='igp']/value"/>
            <xsl:variable name="ifname">
                <xsl:value-of select="../../name"/>
                <xsl:text>.</xsl:text>
                <xsl:value-of select="../name"/>
            </xsl:variable>
            <xsl:choose>
                <xsl:when test="$role = 'cpe'">
                    <change>
                        <xsl:choose>
                            <xsl:when test="$igp = 'isis'">
                                <protocols>
                                    <isis>
                                        <interface>
                                            <name><xsl:value-of select="$ifname"/></name>
                                        </interface>
                                    </isis>
                                </protocols>
                            </xsl:when>
                            <xsl:when test="$igp = 'ospf'">
                                <protocols>
                                    <ospf>
                                        <area>
                                            <name>
                                                <xsl:value-of select="data[name='area']/value"/>
                                            </name>
                                            <interface>
                                                <name><xsl:value-of select="$ifname"/></name>
                                            </interface>
                                        </area>
                                    </ospf>
                                </protocols>
                            </xsl:when>
                        </xsl:choose>
                    </change>
                </xsl:when>
            </xsl:choose>
        </xsl:for-each>
    </xsl:template>
</xsl:stylesheet>

SLAX Syntax

content_copy zoom_out_map
version 1.0;
ns junos = "http://xml.juniper.net/junos/*/junos";
ns xnm = "http://xml.juniper.net/xnm/1.1/xnm";
ns jcs = "http://xml.juniper.net/junos/commit-scripts/1.0";
import "../import/junos.xsl";
 
match configuration {
    for-each (interfaces/interface/unit/apply-macro[name = 'ifclass']) {
        var $role = data[name='role']/value;
        var $igp = data[name='igp']/value;
        var $ifname = {
            expr ../../name;
            expr ".";
            expr ../name;
        }
        if ($role = 'cpe') {
            <change> {
                if ($igp = 'isis') {
                    <protocols> {
                        <isis> {
                            <interface> {
                                <name> $ifname;
                            }
                        }
                    } 
                }
                else if ($igp = 'ospf') {
                    <protocols> {
                        <ospf> {
                            <area> {
                                <name> data[name='area']/value;
                                <interface> {
                                    <name> $ifname;
                                }
                            }
                        }
                    }
                }
            }
        }
    }
}

Configuration

Procedure

Step-by-Step Procedure

To download, enable, and test the script:

Copy the script into a text file, name the file if-class.xsl or if-class.slax as appropriate, and copy it to the /var/db/scripts/commit/ directory on the device.

Select the following test configuration stanzas, and press Ctrl+c to copy them to the clipboard.

If you are using the SLAX version of the script, change the filename at the [edit system scripts commit file] hierarchy level to if-class.slax.

content_copy zoom_out_map
system {
    scripts {
        commit {
            file if-class.xsl;
        }
    }
}
interfaces {
    so-1/2/3 {
        unit 0 {
            apply-macro ifclass {
                area 10.4.0.0;
                igp ospf;
                role cpe;
            }
        }
    }
    t3-0/0/0 {
        unit 0 {
            apply-macro ifclass {
                igp isis;
                role cpe;
            }
        }
    }
}

In configuration mode, issue the load merge terminal command to merge the stanzas into your device configuration.
```
[edit]
user@host# load merge terminal
[Type ^D at a new line to end input]
... Paste the contents of the clipboard here ...
```
1. At the prompt, paste the contents of the clipboard by using the mouse and the paste icon.
2. Press Enter.
3. Press Ctrl+d.
Commit the configuration.
```
user@host# commit
```

Verification

Purpose

Verify that the script behaves as expected.

Action

View the configuration to verify that the manual changes and the script-generated changes are present.

When you issue the show interfaces configuration mode command, the changes added by the sample configuration stanzas should be present in the configuration.

content_copy zoom_out_map
[edit]
user@host# show interfaces
t3-0/0/0 {
    unit 0 {
        apply-macro ifclass {
            igp isis;
            role cpe;
        }
    }
}
so-1/2/3 {
    unit 0 {
        apply-macro ifclass {
            area 10.4.0.0;
            igp ospf;
            role cpe;
        }
    }
}

When you issue the show protocols configuration mode command, the script-generated changes should be present in the configuration.

content_copy zoom_out_map
[edit]
user@host# show protocols
isis {
    interface t3-0/0/0.0;
}
ospf {
    area 10.4.0.0 {
        interface so-1/2/3.0;
    }
}

arrow_backward PREVIOUS Example: Configure Dual Routing Engines

NEXT arrow_forward Example: Control IS-IS and MPLS Interfaces

Automation Scripting User Guide

ON THIS PAGE