Window Commences: 2008-07-31 23:00:00 GMT (UTC + 0)
Window Concludes: 2008-08-01 06:00:00 GMT (UTC + 0)
During the above window the fibre links between each of our 3 UK sites will be taken off line for approximately 10 minutes at a time to perform maintenance and upgrades.
Whilst these upgrades are performed traffic between sites will be affected and some asymmetric routing may be visible.
Customers single-homed to one of these switches will notice an outage of approximately 10 minutes per site during the maintenance window. As a precaution of the upgrade, each site will be isolated from the ring before work commences.
This work will involve splitting the ring in a controlled manner and, therefore, places us in an at-risk period for the remainder of the ring for the duration of the upgrade on each switch.
Contingency plan:
Should the above maintenance fail to be successful as planned then the network topology will be restored to its prior state from backups.