JunOS BGP

In this Tutorial We will be discussing how to setup an External Border Gateway Protocol (EBGP) between two routers.

Prerequisites

To complete this tutorial, you will need:

• A laptop running Linux or MacOS. for this tutorial I will be using a laptop running Ubuntu 16
• A console cable. Since all the new laptops today don't come with a USB port, you will need a USB to Console adapter
• The program "Screen"

If you don't have "screen" install it with the command below

sudo apt-get install screen

The Goal

Our goal is to setup the network like in the above image.

We have 2 offices. One in Texas and the other one in San Fransisco. Both offices have a Juniper MX80 router. The Texas router cr1-tx is in AS 17 and the San Fransico router cr1-sfo is in AS 29. We need to setup an External Border Gateway Protocol (EBGP) to connect both offices.

Accessing the device

• Step 1: Plug the console cable to you device into the console port and start screen as root user on your laptop

screen /dev/ttyUSB0

• step 2: Power on your device

After the device finished booting you will get at the prompt below

• Step 3: Enter the username and password

By default, all Juniper devices username is "root" with no password. At the prompt, just type in root and hit enter