Recently a customer (the Insolvency Service) faced a not uncommon problem; a large portion of critical switching infrastructure was out of support. The story also quite familiar; the environment itself was marked for decommissioning several years ago so it wasn’t transitioned into support by the main network provider. The same infrastructure rather than fading out as expected actually became more critical as additional Internet services came on stream. The upshot was the customer had an array of Cisco switches consisting of an early generation “3750” core network, a dozen “2900” series and a “3500XL” acting as an access/distribution layer. The servers they support were split across eight racks in two banks, some of these were pretty ancient, plus there were also two large VMware hosts and a handful of brand new servers.Read more...