IP FRR and Micro-loops Part 2

IP FRR Fig.20

This is a continuation from Part 1 Remote LFA At this point we already know that simple LFA doesn't always provide full … [Read more...]

IP FRR and Micro-loops Part 1

IP FRR Fig.24

Introduction In this post we will take a look at IP FRR and Micro-loops. If the reader already doesn't have some kind of … [Read more...]

HTIRW: The IETF Draft Process

In our deeper investigations of the IETF as a "sample standards body" in this (apparently forever running) series on how the … [Read more...]

Transit vs peering: what makes sense when?


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


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


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


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


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


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


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)


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