Category: podcast

Snabb Switch and NFV on OpenStack in Software Gone Wild

Last September I received a peculiar tweet from Luke Gorrie pointing me to a software switch pushing 200 Gbps through an Intel server literally hours after I’d watched the Deutsche Telekom Terastream presentation, so I mentioned Luke’s Snabb Switch as a potential performance solution in an email to Ian Farrer… and before Ian managed to reply, Luke was already working for Deutsche Telekom.

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Data Center Fabrics Built with Plexxi Switches

During the recent Data Center Fabrics Update webinar Dan Backman from Plexxi explained how their innovative use of CWDM technology and controller-assisted forwarding simplifies deployment and growth of reasonably-sized data center fabrics.

I would highly recommend that you watch the video – the start is a bit short on details, but he does cover all the juicy aspects later on.

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NEC ProgrammableFlow Scalability Features

Once you get rid of spanning tree and associated kludges (not too hard in OpenFlow-based networks), BUM flooding becomes your biggest enemy. NEC’s engineers implemented some interesting features in the ProgrammableFlow switches and controllers: rate-limiting of unknown unicast frames, flooding control, and ARP snooping (if only they’d go for ARP proxy).

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Virtual Tenant Networks with NEC ProgrammableFlow

Virtual tenant networks are one of the best features of NEC ProgrammableFlow solution – you can build virtual layer-2 subnets (based on VLANs, edge ports or port/VLAN combos), connect them with a virtual router, and implement packet filters and traffic steering ... while treating the whole data center fabric as a single device.

Even better, the ingress edge switch performs all the operations you configure (ACLs, L2 lookup, L3 lookup, source/destination MAC rewrite), resulting in optimal end-to-end forwarding.

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