Open networking; leaf-spine...

I recently came across a norwegian tech-article regarding open networking vs proprietary networking.

More specifically, it talks about the Open Compute Project - for those of you who don't know, read this. More information can be found here.

The project discusses the use of open standards when building huge, energy-demanding and efficient data-centers. Basically, OCP talks about replacing the common standard networking architecture with something (kind of) new, to meet the ever evolving (and consequently; demanding) bandwidth and streaming of tomorrows data-centers. Mainly, replacing the tree-span network-design with the leaf-spine network-design.

A leaf-spine network design consists of the following:

• Top-of-rack (leaf) switches (leading to spine-switches).
• Spine-switches (between leaf- and core-layers in a leaf-spine network).
• ... and other hardware and software solutions for rack-use.

LEAF-SPINE NETWORK

In a so-called "leaf-spine" layer-2 network; the spanning-tree protocol is often replaced with either a version of Transparent Interconnection of Lots of Links ("TILL") or Shortest Path Bridging ("SPB").

In a leaf-spine layer-3 network; each link is a routed link. Open Shortest Path First ("OSPF") is often used as the routing-protocol to compute paths between leaf and spine switches.

The norwegian in me thinks the reporter has (way too) big expectations, especially if he's counting on norwegian authorities and heavy industry for this (quite HUGE) change to take place.

But on the other hand, my inner sysadmin really likes the possibility of administrating a data-center with fully open networking-protocols / -equipment and/or -hardware :)

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My own little µ-datacenter is based on open protocols, open systems, and somewhat open hardware.
http://blog.pizslacker.org/2014/10/datacenter-so-far.html

Norwegian article:
http://www.cw.no/artikkel/kommentar/apent-ikke-proprietaert

Cisco Turns Routers Into Linux Application Servers

I've always had a good eye to Cisco's networking equipment, due to the fact that they are administered through a CLI (Command Line Interface), i.e.: POSIX-style ;^)

Now they're integrating a GPL'ed Linux environment on certain so-called "AXP" switches/routers to allow for hosted applications developed with the accompanying standardized SDK and API (which includes standard support for C, Java and Python).

From http://www.internetnews.com/:

"From a GPL perspective, we've taken all the things that are GPL and reciprocated the code back to the community," Conover said. "Obviously if a developer built an application on top of a GPL platform, that doesn't imply that they have to GPL that code. "

The GPL is a reciprocal license that requires any modification made be contributed back to the community.

Overall, Cisco expects the AXP to reduce the hardware footprint at branch offices and provide deeper network integration that provides IT managers with more control over what they can monitor.

I suppose they realized the potential for hosted applications on network equipment after releasing the WRT54** series of routers through their sister company "Linksys". These routers offer the possibility to flash the firmware, allowing home-brewed firmware/software to be deployed. I have a WRT54GL router @ home, running "DD-WRT" with a few cross-compiled custom apps for network monitoring. And I must say, it gives me monitoring capabilities I never could have imagined a few years ago ;)

Demystifying Denial-of-Service attacks

Interesting article uncovering the various ways of performing Denial-of-Service attacks through advanced networking.

http://www.securityfocus.com/infocus/1853