Collection of useful, relevant or inane places on the the Internets for 28 Apr 11:
- LISP – Locator Identifier Separation Protocol (Say what?) « FryGuy’s Blog – Jeff Fry does a good job on providing an intro to LISP.
- OpenFlow – Next-Generation Networking for a Smarter Planet – IBM ( as BladeNetworks ) are demonstrating OpenFlow for Top of Rack switching at InterOp. Think I'll make a note to go and see that.
- Jeff Doyle on IP Routing: IPv6 in the Enterprise May Happen Unexpectedly Fast –
So while enterprise network operators are now asking the questions service providers were asking five or six years ago, they are getting answers that were unavailable five years ago. The result, I think, will be a faster uptake of IPv6 in the enterprise.
Jeff Doyle thinks IPv6 will happen sooner rather than later, I'm not so sure of that.
- Learn the Basics of Spectrum Analysis with a Free Guide | MetaGeek – I'm not sure when I became someone who is worth quoting – it's flattering but it doesn't feel like it should be me. I still believe that everyone should have an Spectrum Analyser and would recommend the MetaGeek product.
- HP Blogs – This is not the convergence you were looking for – The HP Blog Hub – Deepak Munjal from HP gets it.
If each FCoE switch is also running the full Fibre Channel protocol, why bother with convergence at all and just run two separate networks? In fact, I would argue that this approach actually adds more complexity and limits interoperability even further than the non-converged model. Now each FCoE switch is necessarily more complex (and expensive!) than a regular data center 10GbE switch and you're still managing two stacks. At least with the typical Ethernet network, customers have comfort that there is some level of interoperability between vendors. This approach seems to limit FCoE interoperability to no better than where the Fibre Channel industry is today. Again, I don’t think is the direction most customers want the Ethernet industry to go.
Why tunnel FC over Ethernet when you could use native IP ? The whole idea still baffles me.
- ISP Column – April 2011 – Geoff Huston:
We've learned a number of axioms of networking in the decades we're been working with packet switched networks and the Internet in particular. Among them I would offer the following three:
Tunnelling is really never a good answer.
Stateful devices in the data path are invariably problematic.
NATs are strange!
Insightful and full of evidence as always. Teredo is crap and should not be used.