Category

networking

• networking, sites

  The Web is quite well, thank you

  08.17.10 | Permalink | Comment?

  An article on Wired.com recently claimed that Web is dying, largely based on traffic data from Cisco, and illustrated with this graph: If you believe this graph you might actually agree with the impending death of the Web. But Rob Beschizza at BoingBoing drew a new graph based on the actual total traffic numbers, which [...]

• life, networking

  My provider and IPv6

  07.12.10 | Permalink | Comment?

  It’s a pretty simple question (if you’re an IT geek, anyway): “Hello [insert Internet provider's name here], I was just wondering when you will start supporting IPv6, or if there’s a plan to do that at all.” Call up your ISP’s help line and (unless it’s a really good one) watch the total chaos and [...]

• ict / computers, networking

  Providing DHCP to multiple VLANs from one server

  06.17.09 | Permalink | 4 Comments

  Suppose you have a network with multiple VLANs, each with its own subnet, and you want your DHCP server(s) to serve addresses and configuration to all subnets (or at least more than one of them). The problem normally is that broadcast traffic (such as DHCP requests from clients) cannot traverse broadcast domains, which is exactly [...]

• books, ict / computers, networking, work

  Book tip: “Security in a Web 2.0+ World: A Standards-Based Approach” by Carlos Solari

  06.15.09 | Permalink | 1 Comment

  I went to hear Carlos Solari speak here in The Netherlands last week, and his message makes a lot of sense: to create truly secure infrastructures, devices and services, all components must be built using the ‘SBD’ or Security By Design principles. Solari and his team put forth the view that to create a fully [...]

• ict / computers, networking

  Cisco Nexus 1000V – a true switch for Vmware

  02.25.09 | Permalink | 1 Comment

  The Cisco Nexus 1000V has been available for a while but I just realised I hadn’t raved about it yet, so here goes: it’s quite possibly one of the best examples of ‘technology A meets technology B and creates a beautiful baby’ I’ve seen in the past year. The ‘normal’ Cisco Nexus series of switches [...]

• ict / computers, networking

  Network performance on VMware

  12.08.08 | Permalink | 2 Comments

  For the past month or so I’ve been working on a problem a client has with his VMware farm(s). They’re using Vizioncore vReplicator to replicate VMs from their production farm (containing three VMware ESX 3.5 servers connected to an HP EVA fibre SAN) to their backup facility (two VMware ESX 3.5 servers with a similar [...]

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