Transit vs peering: what makes sense when?

noction-creative-blog-post-12-jan-2015

Iljitsch van Beijnum, Network Engineer and author, is our guest blogger today with a post about peering sponsored by Noction … [Read more...]

BGPSEC: Leaks and Leaks

bgpsec-certs

This is the final post in my series on BGPSEC — I will probably follow this up, at some point, with a couple of posts on some … [Read more...]

BGPSEC: Signatures and Performance

BGPSEC is a set of BGP extensions being developed by the SIDR working group of the IETF to improve the security of the … [Read more...]

BGPSEC: Replays, Timers, and Performance

bgpsec-mitm

Let's return to our simple four AS network to look at a number of issues with BGPSEC — the bits you won't often hear … [Read more...]

Policy-based Tunnel Selection (PBTS) on Cisco IOS-XR

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Recently, I had to look after PBTS on Cisco ASR9K platform and faced some issues, here are some results about my tests. PBTS … [Read more...]

HTIRW: Standards Bodies

(yes, I know, it's been a while... But it's time to get back to this series) Up to this point in this series, we've been … [Read more...]

BGPSEC: Protections Offered

bgpsec-mitm

In my last post on the subject of BGPSEC, I explained the basic operation of the modifications to BGP itself. In this post, … [Read more...]

NG mVPN-Control Plane Overview

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In this post we will be exploring the shortcomings of MVPN (Draft Rosen/RFC 6037), with a focus on how NG-MVPN technologies … [Read more...]

BGPSEC: Basic Operation

bgpsec-fig01

I'm going to take a little break from my other two series to inject a short series on BGPSEC. I'll return to HTIRW and RFCs … [Read more...]

Network Design Concepts Part-3

In the first article of the series, reliability and resiliency are covered. We should know that whatever device, link type or … [Read more...]

HTIRW: Provider Peering and Revenue Streams (Part 2)

This is a continuation from last week's post on provider peering streams. Second Example: Customer to Noncustomer Assume … [Read more...]

HTIRW: Provider Peering and Revenue Streams (Part 1)

htirw-fig-02

In the last post in this series, I described several types of providers -- and even how those descriptions are no longer … [Read more...]

Traceroute – A Small Tool for Big Problems

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Basics is must for Network Engineer.Traceroute is an imp and handy tool while  troubleshooting any network issue.How … [Read more...]

Now that We’ve Buried the Seven Layer Model…

hybrid-model

"But the seven layer model is still useful for teaching networking..." So ran the most common reaction to my post last week … [Read more...]

The Seven Layer Model is Dead

Whether we have the funeral in New Orleans style (with a lot of brass and, well, other stuff), or in the more somber style … [Read more...]