Overview

01	You invoke it by adding the following to the switch's configuration:
02	 
03	event-options {
04	    policy LINK-UP {
05	        events snmp_trap_link_up;
06	        then {
07	            event-script link-up.slax {
08	                arguments {
09	                    ifname "{$$.interface-name}";
10	                }
11	            }
12	       }
13	    }
14	}
15	 
16	 
17	The output is SYSLOG will look like:
18	 
19	Aug  1 16:14:37   cscript: link-up.slax: IFNAME ge-0/0/3 MAC 00:1e:37:86:13:30
20	 
21	 
22	This was tested on EX4200 running JUNOS 9.6.
23	 
24	Note: To allow time for the ethernet switching table to populate, I had to add a delay once the event triggers.

1	Aug  1 16:14:37   cscript: link-up.slax: IFNAME ge-0/0/3 MAC 00:1e:37:86:13:30

SLAX Script Contents

001	/*
002	*
003	*    NAME: link-up.slax
004	*    PURPOSE: The requirement is that when a link becomes
005	*             active, a message needs to be written to
006	*             syslog indicating the interface name and
007	*             the MAC addresses of the device(s) plugged
008	*             into the interface.
009	*
010	*    CREATED: 08/10/09
011	*    BY: Jay Wilson (Solutions Architect - Western Area)
012	*    LAST MOD: 08/11/09
013	*    BY: Jay Wilson
014	*    VERSION: 1.00
015	*
016	*    MODIFICATION HISTORY:
017	*        V1.00 = Initial release
018	*        V1.01 = Added delay to allow MAC table to
019	*                be populated.
020	*
021	*/
022	version 1.0;
023	ns junos = "http://xml.juniper.net/junos/*/junos";
024	ns xnm = "http://xml.juniper.net/xnm/1.1/xnm";
025	ns jcs = "http://xml.juniper.net/junos/commit-scripts/1.0";
026	import "../import/junos.xsl";
027	 
028	/*
029	*
030	*  Define the argument that will be passed into the script.
031	*  This argument is by the event attribute "interface-name"
032	*  when the event triggers.
033	*
034	*/
035	var $arguments = <argument> {
036	    <name> "ifname";
037	    <description> "Interface to report about.";
038	}
039	param $ifname;
040	 
041	/*
042	*
043	*   debug1 -> Highlevel debugging
044	*   debug7 -> Lowlevel debugging
045	*   0 == off
046	*   1 == on
047	*
048	*/
049	var $debug1 = "0";
050	var $debug7 = "0";
051	 
052	match / {
053	/*
054	*
055	*   Get the MAC table from the switch
056	*
057	*/
058	    expr jcs:sleep(3);
059	    var $rpc = <get-ethernet-switching-table-information> {
060	        }
061	    var $switch-output = jcs:invoke($rpc);
062	    call debug ( $type = "r", $on = $debug7, $output = $switch-output//text());
063	/*
064	*
065	*   Process the MAC table
066	*
067	*/
068	    for-each ($switch-output/ethernet-switching-table/mac-table-entry) {
069	        for-each (mac-interfaces-list) {
070	        call debug ( $type = "w", $on = $debug1, $output = "In the Loop.");
071	        if (contains(mac-interfaces,$ifname)) {
072	            var $message = "IFNAME " _ $ifname _ " MAC " _ ../mac-address;
073	            call write-it ($message = $message);
074	        }
075	        }
076	    }
077	}
078	/*
079	*   NAME: WRITE-IT
080	*   PURPOSE: Writes a message to SYSLOG that is passed to it.
081	*   CALLED: Can be called at any time from any where.
082	*
083	*   PARMS PASSED:
084	*        $message = The string to print out
085	*
086	*/
087	template write-it($message) {
088	    expr jcs:syslog("user.warn","link-up.slax: ",$message);
089	}
090	/*
091	*   NAME: DEBUG
092	*   PURPOSE: Writes debugging information to SYSLOG.
093	*   CALLED: Can be called at any time from any where.
094	*
095	*   PARMS PASSED:
096	*        $type = indicates the type of information
097	*                being passed in.  An "r" means the
098	*                information is a node-set result.
099	*        $on = turns on writing it or not
100	*        $output = the string that needs to be
101	*                  printed
102	*
103	*/
104	template debug ( $type, $on, $output) {
105	    if ($on == "1") {
106	        if ($type == "r" ) {
107	            for-each( $output ) {
108	                call write-it($message = . );
109	            }
110	        }
111	        else {
112	            call write-it($message = $output);
113	        }
114	    }
115	}

XML Script Contents

01	<?xml version="1.0"?>
02	<script>
03	<title>link-up.slax</title>
04	<author>jayw</author>
05	<synopsis>
06	 
07	</synopsis>
08	<coe>event</coe>
09	<type>ethernet-switching</type>
10	 
11	<description>
12	Logging of MAC addresses with correlation to the interface (EX) they are attached to
13	 
14	</description>
15	 
16	 <example>
17	 <title>Example</title>
18	 <config>example-1.conf</config>
19	 </example>
20	 
21	<xhtml:script xmlns:xhtml="http://www.w3.org/1999/xhtml"
22	src="../../../../../web/leaf.js"
23	type="text/javascript"/>
24	</script>