Juniper ZTP/Homer

Goal

In this Tutorial, we are going to setup a ZTP environment to be able to run the basic configuration on a new Juniper switch. Once the basic configuration is done, we will run homer to deploy the switch configuration. If you want to know more about homer please check: https://wikitech.wikimedia.org/wiki/Homer

Prerequisites

For this tutorial I will be using :

- EVE-NG 2.0.3-112

- VQFX model: vqfx-10000 running JUNOS 19.4R1.10

- DHPC/TFTP VM (IP:10.192.16.5/install1001.dfw.labnet)

- Homer VM(IP:10.192.32.17/homer1001.dfw.labnet)

- Netbox VM(IP:10.192.32.3/netbox1001.dfw.labnet)

- DNS server(IP:10.192.16.2/ns0.dfw.labnet)

All the VM's are running on Proxmox 7.3.4

Setup and Configuration

The section is the just the section needed to make ztp work.

Note: We will generate the juniper_ztp file using later on a python script

DHCP configuration

#######################################################################
# ZTP Sample Config begins here:
#######################################################################
option option-150 code 150 = ip-address;
set vendor-string = option vendor-class-identifier;
option space ZTP;
option ZTP.image-file-name         code 0 = text;
option ZTP.config-file-name        code 1 = text;
option ZTP.image-file-type         code 2 = text;
option ZTP.transfer-mode           code 3 = text;
option ZTP.alt-imagefile-name      code 4 = text;
option ZTP-encapsulation           code 43 = encapsulate ZTP;
# mgmt nework
subnet 10.193.0.0 netmask 255.255.255.0 {
         authoritative;
         option subnet-mask             255.255.255.0;
         option option-150              10.192.16.5;  #TFTP server
         option routers                 10.193.0.1;
         option broadcast-address       10.193.0.255;
         option domain-name             "mgmt.dfw.labnet";
         default-lease-time             600;
         max-lease-time                 7200;
}
group {
        vendor-option-space ZTP;
        include "/etc/dhcp/juniper_ztp";   
}

DNS entries for the 4 switches

$ORIGIN 0.193.10.in-addr.arpa.
---
101     1H      IN      PTR     lsw1-a1-dfw.mgmt.dfw.labnet.
102     1H      IN      PTR     lsw1-a2-dfw.mgmt.dfw.labnet.
103     1H      IN      PTR     lsw1-a3-dfw.mgmt.dfw.labnet.
104     1H      IN      PTR     lsw1-a4-dfw.mgmt.dfw.labnet.

$ORIGIN mgmt.dfw.labnet.
---
lsw1-a1-dfw      1H      IN      A       10.193.0.101
lsw1-a2-dfw      1H      IN      A       10.193.0.102
lsw1-a3-dfw      1H      IN      A       10.193.0.103
lsw1-a4-dfw      1H      IN      A       10.193.0.104

Script

This Python scrip will read data from a csv file and generate the juniper_ztp file using a template.

- cvs file In a real world, working with real switches you can get the mgmt interface MAC directly from the sticker on the box the switch came in. You don't have to power on and connect to the switch before getting the inforamtion.

hostname,mgmt_ip,cidr_bits,mac_address
lsw1-a1-dfw,10.193.0.101,24,50:00:00:0e:00:00
lsw1-a2-dfw,10.193.0.102,24,50:00:00:16:00:00
lsw1-a3-dfw,10.193.0.103,24,50:00:00:17:00:00
lsw1-a4-dfw,10.193.0.104,24,50:00:00:18:00:00

- template