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Configuring Administrative Groups for LSPs

Administrative groups, also known as link coloring or resource classes, are manually assigned attributes that describe the color of links. Links with the same color conceptually belong to the same class. You can use administrative groups to implement a variety of policy-based label-switched path (LSP) setups.

In this example, the JUNOS management process (mgd) inspects the configuration, looking for apply-macro statements. For each apply-macro statement with the color parameter included at the [edit protocols mpls] hierarchy level, the script generates a transient change, using the data provided within the apply-macro statement to expand the macro into a standard JUNOS administrative group for LSPs.

For this example to work, an apply-macro statement must be included at the [edit protocols mpls] hierarchy level with a set of addresses, a color parameter, and a group-value parameter. The commit script converts each address to an LSP configuration and converts the color parameter into an administrative group. For the necessary configuration statements, see Testing ex-lsp-admin.xsl.

For a line-by-line explanation of this script, see Example: Creating Custom Configuration Syntax with Macros.

XSLT Syntax



<?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:variable name="mpls" select="protocols/mpls"/>
        <xsl:for-each select="$mpls/apply-macro[data/name = 'color']">
            <xsl:variable name="color" select="data[name = 'color']/value"/>
            <xsl:for-each select="$mpls/apply-macro[data/name = 'group-value']">
                <xsl:variable name="group-value" select="data[name =                                 'group-value']/value"/>
                <transient-change>
                    <protocols>
                        <mpls>
                            <admin-groups>
                                <name>
                                    <xsl:value-of select="$color"/>
                                </name>
                                <group-value>
                                    <xsl:value-of select="$group-value"/>
                                </group-value>
                            </admin-groups>
                            <xsl:for-each select="data[not(value)]/name">
                                <label-switched-path>
                                    <name>
                                        <xsl:value-of select="concat($color, '-lsp-', .)"/>
                                    </name>
                                    <to><xsl:value-of select="."/></to>
                                    <admin-group>
                                        <include-any>
                                            <xsl:value-of select="$color"/>
                                        </include-any>
                                    </admin-group>
                                </label-switched-path>
                            </xsl:for-each>
                        </mpls>
                    </protocols>
                </transient-change>
            </xsl:for-each>
        </xsl:for-each>
    </xsl:template>


</xsl:stylesheet>

SLAX Syntax



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 {
    var $mpls = protocols/mpls;


    for-each ($mpls/apply-macro[data/name = 'color']) {
        var $color = data[name = 'color']/value;


        for-each ($mpls/apply-macro[data/name = 'group-value']) {
            var $group-value = data[name = 'group-value']/value;
            <transient-change> {
                <protocols> {
                    <mpls> {
                        <admin-groups> {
                            <name> $color;
                            <group-value> $group-value;
                        }
                        for-each (data[not(value)]/name) {
                            <label-switched-path> {
                                <name> $color _  '-lsp-' _  .;
                                <to> .;
                                <admin-group> {
                                    <include-any> $color;
                                }
                            }
                        }
                    }
                }
            }
        }
    }
}

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