OSUOSL SCHEDULED MAINTENANCE: Network Gateway Migration to State Data Center (SDC) - Feb 17

[richardlau]

https://lists.osuosl.org/pipermail/hosting/2026-February/000649.html

As part of our ongoing migration to the State Data Center, the Oregon State
University Open Source Lab (OSUOSL) will be performing critical network
maintenance on Tuesday, February 17.

Maintenance Window

Start: Tuesday, Feb 17, 10:00 AM PSTEnd: Tuesday, Feb 17, 12:00 PM PST
This maintenance involves moving the default gateways for specific subnets
from the Corvallis router to our new router at the State Data Center (SDC).

Currently, traffic for many hosts physically residing in the SDC still
routes back through our Corvallis datacenter. This creates a single point
of failure, as the Corvallis facility is currently experiencing UPS
reliability issues. By migrating these gateways to the SDC router, we
eliminate this dependency on the Corvallis power infrastructure and
significantly improve the stability and redundancy of our network. We are
working as quickly as possible to complete these moves to safeguard your
hosted services.

Impact

Gateways will be migrated one by one. You should expect a brief period of
network unreachability (typically a few minutes) for each subnet as the
cutover occurs.

Please note: This maintenance only covers the subnets listed below.
Additional subnets will be moved at a later date which has yet to be
scheduled.
Affected Subnets

The following subnets and their associated IPv4/IPv6 ranges will be
migrated during this window:

General Servers 1: 140.211.166.0/25 | 2605:bc80:3010:101::/64
General Servers 2: 140.211.167.128/25 | 2605:bc80:3010:102::/64
General Servers 3: 140.211.15.0/24 | 2605:bc80:3010:103::/64
General Servers 4: 140.211.9.0/24 | 2605:bc80:3010:104::/64
OSL OpenStack 1: 140.211.167.0/27 | 2605:bc80:3010:501::/64
OSL OpenStack 2: 140.211.166.224/27 | 2605:bc80:3010:502::/64
OSL OpenStack 3: 140.211.169.128/26 | 2605:bc80:3010:503::/64
OSL OpenStack 4: 140.211.167.64/27 | 2605:bc80:3010:504::/64
OSL OpenStack 5: 140.211.169.0/26 | 2605:bc80:3010:505::/64
OSL OpenStack 6: 140.211.10.64/26 | 2605:bc80:3010:506::/64
OSL OpenStack 7: 140.211.11.0/24 | 2605:bc80:3010:507::/64
OSL Services: 140.211.166.128/28 | 2605:bc80:3010::/64
OSL Internal: 140.211.166.144/28 | 2605:bc80:3010:1::/64
OSL Protected: 140.211.167.120/29 | 2605:bc80:3010:2::/64

IPv6 SLAAC Enabling
Along with the router migration, we will be enabling SLAAC (Stateless
Address Autoconfiguration) on all of the subnets listed above. Hosts on
these networks will automatically be assigned an IPv6 address. Please
ensure your local firewall configurations (e.g., ip6tables, nftables) are
updated if you wish to manage traffic for these auto-assigned addresses.

For more information on our migration progress and how you can support our
efforts, please see our latest blog post.

If you have any questions or experience prolonged connectivity issues after
the maintenance window, please reach out to us at support at osuosl.org.