l2tp

Configuring an L2TPv3 Ethernet Pseudowire

Mark_Lewis — Mon, 24 Mar 2008 18:18:04 -0400

As I mentioned last time, L2TPv3 has a plethora of capabilities, including the capability to be used for remote access VPNs, the capability to transport a number of Layer-2 protocols in a pseudowire configuration, the capability to transport MPLS Layer-3 VPN traffic, and the capability to transport IPv6 over an IPv4 backbone network.

In this blog post, I am going to focus on the most popular application for L2TPv3 - pseudowires.

The first question to answer in regard to L2TPv3 pseudowire configuration is, ‘What is a pseudowire?'. As I mentioned briefly last time, a pseudowire is simply an emulated circuit. By using L2TPv3, it is possible to extend a number of layer-2 circuit types over an IP backbone network.

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L2TPv3 Pseudowhat?

Mark_Lewis — Mon, 25 Feb 2008 17:48:32 -0500

L2TPv3 has been around for a while now, but it seems to be one of those things that not too many people know about.

Typically, when I raise the subject of L2TPv3, I get one of the following reactions:

‘L2TPv3 pseudowhat?'

‘Nobody uses that anymore - it's obsolete, isn't it?'

‘That's a good solution for tunnelling PPP, but we're talking about Ethernet.'

So, for those who aren't really aware of L2TPv3 or what it can do, I thought I'd blog a little on the subject.

The first thing to say about L2TPv3 is that it is not L2TPv2, but it is based on L2TPv2. And the first thing to say about L2TPv2 is that it is neither L2F nor PPTP, but it is based on both of those protocols.

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Choosing the Right Remote Access VPN: 9 Important Questions

Mark_Lewis — Thu, 27 Dec 2007 16:10:29 -0500

Last time I looked at some important questions to ask when selecting a site-to-site VPN protocol or technology. This time I will discuss some the important questions to ask when choosing a remote access VPN.

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Which Site-to-Site VPN: 10 Important Questions

Mark_Lewis — Sat, 22 Dec 2007 21:56:21 -0500

One of the most common questions that I am asked is what type of VPN an organization should deploy. So, in the hope that it will save some people some time, I thought I’d just go through some of the most basic considerations when choosing a VPN protocol.

Let’s suppose you’ve decided to deploy a VPN to connect your organization’s/customers’ sites (a site-to-site VPN). But you are not sure which VPN technology and type you should deploy – should it be IPsec, MPLS layer-3, MPLS layer-2, L2TPv3-based, or another technology?

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