From Softlayer:
Quote
SoftLayer Engineers will be performing upgrade maintenance on the customer router some of your servers connect through on Sunday April 13th starting at 3:00am CDT. During this time, engineers will be swapping out the existing supervisor engines (SUP720-3BXL) with new Cisco best of breed supervisor engines (VS-S720-10G-3CXL) on FCR01.DAL01. As this router provides direct connectivity to your server(s), public internet connectivity will be unavailable at various points during the above maintenance window. Private network connectivity will remain functional throughout the maintenance window. Although we expect this upgrade of the supervisor engines to only take approximately 15 minutes, we have scheduled a maintenance window from 3:00am to 5am CDT.