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Entries with your keyword: BGP in feed data

BGP communities: A weapon for the Internet (Part 2)

Published on: 2019-03-22

This is the second of two posts in which we present a new attack vector on the routing infrastructure of the Internet using BGP communities. In order to investigate to what extent BGP communities can be leveraged for attacks, we conducted two kinds of experiments: lab experiments and active ...

BGP communities: A weapon for the Internet (Part 1)

Published on: 2019-03-21

This is the first of two posts in which we present a new attack vector on the routing infrastructure of the Internet using BGP communities. The Internet as we know it relies on a vast combination of different protocol stacks, protocol extensions, tools and best practices.

Prevent route leaks by explicitly defining policy

Published on: 2019-03-19

Route leaks or even hijacks are one of the biggest flaws in global routing. If a customer or a peer sends routes outside their scope and a provider accepts them, we call these events route leaks - they are prefixes announced accidentally due to wrongly configured import/export filters or those ...

Pulling Configs from Cisco NSO using curl and json2yaml.py

Published on: 2019-03-14

We're using Cisco NSO in our lab at the moment to provision L3VPNs across multi-vendor environments as part of a demo. Just noting down a few things here for future reference: You can use the curl (command-line URL) utility to query NSO's API and retrieve the configuration of a device it knows ...

BGP Implicit and Explicit Withdraw

Published on: 2019-01-02

BGP Implicit and Explicit Withdraw are important BGP messages. Understanding these two mechanisms not only help for understanding BGP convergence but also helps for BGP path diversity. While I was explaining BGP Add-Path in my Instructor Led CCDE course, I used the term 'BGP Implicit Withdraw' ...

Testing notes: simulating link failure by filtering BFD packets

Published on: 2018-12-28

In some testing I am doing, I need to prove that BFD can be used with iBGP to tell the BGP protocol when there is an interruption. This will enable BGP to be brought down much faster than if ...

vRealize Network Insight 4.0 – Smaller Gems

Published on: 2018-12-23

Network Insight 4.0 was released today and it undeniably the biggest release they're ever done. It's packed with some huge features and a lot of small goodness. While Karl has done an excellent job of describing the top features in this blog post, I'll go through the somewhat smaller features ...

GoBGP – A Control Plane Evolving Software Networking

Published on: 2016-03-29

If I have talked to you over the past year or two about networking, odds are I have mentioned a project to you called GoBGP. If we have spoken a lot, you are probably sick of me talking to you about GoBGP There is a reason, it’s because GoBGP is a missing link in networking that has been for a ...

L3 fabric DC -The underlay Network (BGP) -part2

Published on: 2017-01-17

In the previous post, we laid the foundation of L3 fabric DC In this post we will discuss the underlay network which mainly provide IP reachability plus ECMP capability, here BGP would play a role in your DC next to the 3 other that we discussed one of the previous posts.

Classic DC and M-LAG

Published on: 2016-08-29

In the pervious post we talked about BGP in Data Center and how it is a topic of discussion in between the DC and the SP arenas. In this post I will start explaining some classic DC design and laying its shortage which will engage the SP gurus with us, as well it will make sure ...

bgp – advertising multiple paths

Published on: 2014-02-07

Yes, it can be done by BGP. What was the question anyway? Path hiding on a route server running BGP can happen if the route server has been configured to filter the chosen best path from reaching a particular route server client. Assuming a traditional best path selection, when the same prefix ...

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