bgp

Juniper ScreenOS : default route manipulations and redistributions

The default route or “route of last resort” is an important route in most present inter-network connectivity configurations. It contains all public and private routes possible and is responsible for directing traffic to a next hop when no better route is found.  In most cases, it is used to allow networks to access the internet, […]

Juniper ScreenOS : defeating iBGP full mesh requirement using route reflectors and confederations

As explained in one of my earlier posts, one of the requirements to successfully setup and operate an iBGP configuration is that all iBGP clients need to have a BGP connection to all other iBGP clients. (= full mesh). This is required because an iBGP device only exchanges information about its own networks and it […]

Juniper Screenos : Redundant multi-exitpoint ISP routing failover using multiple vrouters, multiple OSPF areas and eBGP

Introduction As you most likely already know, Juniper screenOS supports a couple of dynamic routing protocols (OSPF, BGP, RIP).  These protocols can be used to build very powerful and redundant networks,  however there are some screenos specific issues with these implementations, and these issues may introduce a little bit of complexity in the design and […]

Using Fedora 9 as an OSPF / BGP router (Quagga / Zebra) and set up BGP between Linux and Juniper ScreenOS

In this post, I’m going to show you how to set up a Linux host (Fedora Core 9) and use it as a BGP enabled router.  In order to fully understand the setup & configuration, please have a look at this blog post first, because I’ll use the setup in that post as a foundation […]

Juniper ScreenOS BGP Basics : a simple iBGP test case

As explained in one of my earlier posts, ScreenOS supports a couple of ways to provide for dynamic routing. Today, I’m going to explain some basic implementations of BGP on ScreenOS. Unlike my post on OSPF, I won’t be going too much into all the details of what BGP is and how it works, but […]

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