Building up a Multihomed Core ISP network using Juniper

Name: Building up a Multihomed Core ISP network using Juniper
Rating: 3.7 (8 reviews)

A fully practical course showing how to configure a multihomed ISP core network using Juniper appliances

Created byMy Network Training

Last updated 1/2024

English

English [Auto],

What you'll learn

Build a fully redundant ISP core with Juniper
Configure BGP routing protocol
Configure OSPF routing protocol
Configure AS PATH PREPEND attribute

Course content

1 section • 9 lectures • 1h 50m total length

Explanation about the LAB scenario of this course7:00
Explore a lab scenario for a multi-homed core ISP network using Juniper, with edge and distribution routers, two upstream ISPs, BGP prefix announcements, and internal OSPF for efficient routing.
Setting up IP addressing on the routers9:37
Configure IP addressing on Juniper routers by setting IP on the gigabit ethernet interface and loopback, commit changes, and ping to verify reachability ahead of BGP and OSPF setup.
Configure BGP between the Upstream and ISPs routers15:27
Configure BGP peers between the upstream router and two ISPs, inject and advertise a default route, and create a static 0.0.0.0/0 route for autonomous system 100.
Configure BGP between ISP1 and R111:07
Configure an external BGP peer between ISP1 and R1, assign their autonomous systems, and inject the default route 0.0.0.0/0 into BGP to enable internet reachability.
Configure BGP between ISP2 and R47:36
Configure BGP neighbor between ISP two and router four and insert the default route into BGP to enable multihomed connectivity and internet access.
Configure OSPF on the ISP core network12:26
Configure ospf on the isp core network to publish interfaces and loopbacks, creating a fully converged routing fabric. Verify ospf neighbors and that each router learns all networks.
Inserting a default route into OSPF12:18
Inserting a default route into OSPF demonstrates enabling default routes from two ISPs across a multihomed Juniper core, ensuring routers 2, 3, and 4 reach the internet via either ISP.
Announce prefixes to both ISPs via BGP16:36
Learn how to announce your prefixes to two ISPs using BGP on a Juniper core network, creating policies to advertise routes and enable ISP failover for a multihomed setup.
Allow Internet traffic to reach our prefixes using both ISPs with AS PREPEND18:34
Learn to multihome a core network by using autonomous system path prepend to route prefixes via two ISPs, implement BGP policies, and verify dual-path reachability and failover.

Requirements

Good knowledge with Juniper CLI, BGP and OSPF

Description

Setting up and ISP core network is always a challenge for every ISP. However, if it is designed correctly for one time, then the ISP network would work smoothly forever.

One of the best product to use when running an ISP network is Juniper. As being a very solid product, Juniper is an appliance that it is always highly recommended for ISP core networks and data centers.

In this course, I will use Juniper MX OS to show you how it is possible to build up from scratch a fully redundant and resillient ISP core network.

I will be using advance routing protocols such as Border Gateway Protoco (BGP) and Open Shortest Path First (OSPF) in order to build up my ISP core network. Additionally, I will have to configure the routers of the upstreams (in real life we do not do that) just because I will be doing a complete LAB and also you will learn how ISPs configure their upstream router.

By end of the course, you will have a fully redundant ISP network and you will have a full understanding of how you can configure your ISP core network yourself in your ISP.

I will be showing step by step how everything is being configure, and I will stop at every point and explain what I am doing.

If you wish to have a full understanding of how to set up an ISP core network using Juniper appliances, then this course is for you.

Who this course is for:

Engineers working in ISPs and using Juniper products