L2 MultiPath Basic Design Differences

With all the talk about Layer 2 Multipath (L2MP) designs going on, I just want to point out a fundamental change in the way many people approach network design. It’s seems that this point has been lost somewhere in the discussion of protocols.

The Spanning Tree Protocol blocks looped paths, and in a typical networks this means that bandwidth is unevenly distributed. Of course, we might use PVST or MST to provide a rough sharing of load by splitting the spanning tree preferences for different VLANs, but the design still doesn’t change overall. The basic point is that there is a LOT of bandwidth that is never evenly utilised – and that means wasted power, space and cooling (which costs more than the equipment itself).

Show 28 – vCloud Network Overlays, OTV, VEPA and networking appliances

It was planned to have a discussion around L2 Data Centre connection the VMworld in Copenhagen but Scott and I could not meetup. So we recorded this podcast to start talking about some of the issues, technology and solutions. I’m not sure that we have all the technology or knowledge in place, so keep watching […]

Show 27 – Layer 2 Data Centre Interconnection

It was planned to have a discussion around L2 Data Centre connection the VMworld in Copenhagen but Scott and I could not meetup. So we recorded this podcast to start talking about some of the issues, technology and solutions. I’m not sure that we have all the technology or knowledge in place, so keep watching […]

VMware “vFabric” and the Potential Impact on Data Centre Network Design – The “Network Trombone”

If the VMware vFabric speculation is true, then the service focussed data centre designs just got very, very, interesting.

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