Adding JUNOS to Your Repertoire

I suppose it seems odd to start a few posts about Juniper Networks’ JUNOS on a blog that’s part of what Network World very prominently labels “Cisco Subnet.” But most of the bloggers here attend at least in part to helping their...

Under the Hot Lights in Orlando

I spent the week before last at Networkers in Orlando. Well, not really at Networkers, just sort of around the general area. Never actually got to the event itself.Cisco Press asked me to be the interviewer for a bunch of new...

European Union Plans Widespread IPv6 Deployment by 2010

The European Commission has previously announced, as a part of their i2010 initiative, an action plan to see IPv6 widely deployed in Europe by 2010. The EC is specific about what it means by “widely deployed”: They intend, by 2010,...

IPv6 at the 2008 Olympics

In my previous post I threw out a few thoughts about the idea of enticing users to switch to IPv6 – a sort of variation on the long-running “we need an IPv6 killer app” argument – and the contradictions such enticement efforts would...

Can Users Be Enticed Over to IPv6?

Over the years there have been an enormous number of pilot and showcase projects around IPv6. Japan’s WIDE Project probably holds the distinction of the most IPv6-related programs. Under the leadership of Professor Jun Murai of Keio...

Notes from the Global IPv6 Summit in China

I’m in Beijing for the China IPv6 Summit; this is the eighth year in a row that the organizers have invited me to speak at the event. I did a tutorial yesterday on IPv6 readiness assessment methodologies, and a speech on IPv6 and...

The Rocky Mountain IPv6 Summit: Getting Real

This past Wednesday (April 9) we held the first Rocky Mountain IPv6 Summit in Denver. Considering that none of us who organized the event had much of a clue as to what we were doing when we started out, the logistics came off quite...

Understanding MPLS CSPF

I explained in the previous post how the RSVP-TE Explicit Route Object (ERO) specifies the path of an MPLS LSP by means of a sequenced list of Label Switching Routers (LSRs) that the LSP must pass through between the ingress and...

Understanding Signaling in MPLS Networks

I wrote in the previous post about how the Resource Reservation Protocol with Traffic Engineering extensions (RSVP-TE), in addition to being an MPLS label distribution protocol, is also an MPLS signaling protocol. That is, an ingress...

Understanding MPLS Label Distribution

I've written several posts on different aspects of MPLS: How the FEC is key to the separation of control and forwarding functions in MPLS, the difference between implicit and explicit null labels, how label stacking works, the VPN...

The Itch to Teach

I mentioned in some earlier blog that things always seem to come in waves. One year I’ll make multiple trips to Japan. Another year, jobs will pop up that require repeated trips to China or the UK or Korea or Australia. Nice work, if...

IPv6 Hour at NANOG: A Follow-Up

I wrote in the previous post about IPv6 hour at NANOG, in which the dual-stacked wireless LAN would be shut down and all access would be via the IPv6-only wireless LAN; getting IPv4 destinations outside the LAN would be via NAT-PT.It...

IPv6 Hour at NANOG

I’m attending NANOG in San Jose this week (and in fact am listening to a panel discussion on 100G Ethernet as I’m writing this).During the last NANOG in October, there was a heavy emphasis on practical IPv6 implementation experience....

Understanding MPLS VPNs, Part II

The last post discussed the forwarding plane of MPLS VPN networks – in particular, how they remain private by maintaining separate information tables at each PE and connecting the traffic related to each of these tables over separate...

Understanding MPLS VPNs, Part I

One of the most compelling drivers for MPLS in service provider networks is its support for Virtual Private Networks (VPNs), in which the provider’s customers can connect geographically diverse sites across the provider’s network....

Understanding MPLS Label Stacking

In the last two posts I discussed the role of FECs in MPLS networks, and implicit and explicit null labels. In this brief post I’d like to discuss MPLS label stacking, as a preliminary to a couple of posts on MPLS VPNs. Label...

Understanding MPLS Explicit and Implicit Null Labels

In the previous post, discussing the role of the FEC in MPLS networks, I used in one of my examples a particular label value; I was hoping someone would ask about it, which would give me a nice segue to this post. Well no one did,...

Understanding the Role of FECs in MPLS

It’s funny how things come in waves. For most of last year the majority of my consulting engagements concerned IPv6 in some way or another. But over the past month and a half most of my time has been focused on conducting MPLS...

Reducing Link Failure Detection Time with BFD

One of the great challenges of modern networking is the need to support services such as voice and real-time video that are quite sensitive to packet loss, transmission errors, delay, and jitter using a technology - IP - that is...

Great Suggestions for Volume III

I just returned from a long, intense consulting engagement in India. Now that I’ve got my head back above water, I hope to be able to do some catching up on this blog with some long overdue posts.But first, I want to thank all of you...

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