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...]

Common 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...]

HTIRW: Provider Peering Types

peering-types

One of the confusing aspects of Internet operation is the difference between the types of providers and the types of peering. … [Read more...]

Windows ISATAP Client, Part 2

ISATAP

In Part 1 we discussed how to turn off ISATAP on Windows host—which is a great idea.  Turning off unnecessary components of … [Read more...]

What is Service Chaining?

sfc-fig-rw

This post is in response to a comment on one of my previous posts on using MPLS in the Data Center. Service chaining has … [Read more...]

Using Big Tools for Small Problems

regrigerator-smart-car

BGP in the data center? And MPLS? Are you insane? Well, maybe, yes. But then again, I've been known to do a lot of crazy … [Read more...]

Video over Internet

Video_Drop

Couple days ago I made an interesting talk about Video Traffic over Internet. Sales engineer goes to company and he claims … [Read more...]

Anycast HSRP and Design Considerations

hsrp

HSRP is the first hop redundancy Cisco property protocol which allows a transparent failover of the first-hop gateway. Many … [Read more...]

HTIRW: The Business Side of DNS (2)

</a>continued from part 1 The top level server is either paid for by the domain owner (if they are managing the TLD … [Read more...]