To ensure continued network stability we have planned two maintenance windows during which we will upgrade the firmware of our edge routers to fix the bug that caused the network incident we experienced on April 5. In addition we are going to make some configuration changes to drastically reduce downtime during similar incidents.
The first maintenance window is planned for Tuesday May 2 between 0:00 and 4:00 (Europe/Amsterdam timezone). During this maintenance window we will upgrade our edge router firmware in Amsterdam (ams1). Packets will be re-routed to our router in Haarlem (hlm1).
To solve another minor issue we are also going to reboot one of the line-cards of our network core. This will require a failover to another line-card which will cause a small network interruption of about 30 seconds for customers hosted in ams1. Customers hosted in hlm1 should experience no downtime at all. Other than that no network downtime or packet loss is to be expected.
Once the new firmware is considered stable we will also upgrade our edge router in hlm1 on Tuesday May 23 between 0:00 and 4:00 (Europe/Amsterdam timezone). During this maintenance window packets will be re-routed to our edge router in ams1. In this case no downtime or packet loss is to be expected, neither in ams1 nor hlm1.
We will update this article should unexpected issues arise during the maintenance window and when the maintenance has been successfully completed.
[May 2 01:30] Maintenance on site ams1 has been completed successfully. Total network downtime in ams1 was limited to a couple of seconds due to the linecard reboot. This was as expected and announced upfront.
[May 23 03:00] Maintenance on site hlm1 has been completed successfully.