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

pbts

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

mVPNFig.1

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

tracert

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...]

IPv6 Networking Detection Case #141 – Part 1: The Facts and Clues

ipv6_1

Part #1 - I give you the facts and the clues. Part #2 - I give you what the problem ended up being. Ready to play? This is … [Read more...]

RFCs You Should Know: 6250

Most RFCs are deeply technical — and they follow the "Yaakov rule" for intelligibility (if you didn't write it, or you didn't … [Read more...]

Network Design Concepts Part-2

In the first article of this series, reliability and resiliency has been explained. Every component and every device can and … [Read more...]

Windows ISATAP Client, Part 3

ISATAP3

In Part 2 we did the initial ISATAP configuration for our Cisco router. Here we’ll show the config we use on our Windows … [Read more...]