As part of a planned, staggered, system-wide software upgrade of the routers running the OpenDNS network, we will be reloading the router serving our London point of presence. This upgrade will take place on April 9th approximately between the hours of 00:15 and 01:15 (BST +0100). No service loss will occur for any users. The vast majority of traffic will be re-routed to our NYC and Washington D.C. sites. Users will notice an approximate 70ms increase in latency to our service beyond whatever latency between the user and OpenDNS existed during this time. The precise amount of latency increase and which alternative site they reach will be dependent on both the user’s location and their Internet Service Provider.

EDIT: work is complete with no problems encountered.

The reasoning behind the software upgrade includes both the addition of new features and fixes to outstanding bugs.

We have not run into any existing bugs with our current software, however the upgrade will allow us to begin implementing a system that monitors the performance of our providers and actively routes around problems outside our network. We will update this post once the upgrade is successful and services out of London are back online. While the window of potential sub-optimal performance is an hour, that is a generous over-estimate of the time it should actually take.

EDIT: work is complete with no problems encountered.