On Tuesday, January 13th, our cloud engineering team will be upgrading the operating system on the top of rack network switches of DreamCompute. These switches are redundant so we don't expect any loss of connectivity. This upgrade will resolve the intermittent slow network speeds seen on instances!
Follow the status of the upgrade on the DreamHost Status blog.
UPDATE: The cloud engineering team successfully completed the update. We've seen substantially faster upload/download speeds on instances after the OS upgrade on the switches. If you're still seeing issues, contact our Tech Support team.