Op script - Interface auto-description based on lldp learned neighbors

A coworker said that Arista had this python PortAutoDescription script that auto populates the ports on a switch with it's neighbor description learned through lldp. He was wondering if Juniper had such an implementation. Well this is not built into Junos, but is really easy to do as a SLAX script.

Here it is in action:

{master:0}[edit]

jnpr@SW1# run show lldp neighbors

Local Interface    Parent Interface    Chassis Id          Port info          System Name

ge-0/0/47.0        -                   00:21:59:c7:09:40   ge-0/0/47.0        SW3b               

ge-0/0/44.0        -                   78:19:f7:9f:77:00   ge-0/0/44.0        SW2b               



{master:0}[edit]

jnpr@SW1# show interfaces

ge-0/0/44 {

    unit 0 {

        family ethernet-switching {

            port-mode trunk;

            vlan {

                members all;

            }

        }

    }

}

ge-0/0/47 {

    unit 0 {

        family ethernet-switching {

            port-mode access;

            vlan {

                members v100;

            }

        }

    }

}



{master:0}[edit]

jnpr@SW1# run op IntAutoDesc

lldp-local-interface ge-0/0/47.0 connected to lldp-remote-system-name SW3b

configuration check succeeds

commit complete

lldp-local-interface ge-0/0/44.0 connected to lldp-remote-system-name SW2b

configuration check succeeds

commit complete


{master:0}[edit]

jnpr@SW1# show interfaces

ge-0/0/44 {

    description to-SW2b;

    unit 0 {

        family ethernet-switching {

            port-mode trunk;

            vlan {

                members all;

            }

        }

    }

}

ge-0/0/47 {

    description to-SW3b;

    unit 0 {

        family ethernet-switching {

            port-mode access;

            vlan {

                members v100;

            }

        }

    }

}

SOURCE CODE
----------------------------------

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 /

{

    <event-op-results> {

        var $lldp-info = <command> "show lldp neighbor ";

        var $lldp-result = jcs:invoke($lldp-info);

        var $con = jcs:open();
        for-each($lldp-result/lldp-neighbor-information)

        {
                var $lldp-int = current()/lldp-local-interface;
                var $lldp-remote = current()/lldp-remote-system-name;
                <output>local-name($lldp-int) _ " " _ $lldp-int _ " connected to " _ local-name($lldp-remote) _ " " _ $lldp-remote;

        var $if = substring-before($lldp-int, ".");
        var $int = <configuration> {
           <interfaces> {
              <interface> {
                       <name> $if;
                       <description> "to-" _ $lldp-remote;
               }
             }
        }

        call jcs:load-configuration($connection = $con, $configuration = $int);


        }

        expr jcs:close($con);

      }

}