noticeboard.ru.ac.za

2019/08/06 - Scheduled maintenance, 6 August
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During the Tuesday, August 6th maintenance window, maintenance work affecting a number of services will occur, starting at 5:30 PM and being completed before midnight.  The following work is planned:

  • Server software updates: software on the servers which provide the following services will be updated, resulting in outages of up to 15 minutes per server.  Almost all of the servers providing the services listed below will be assigned new IPv6 addresses later in the evening, though no noticeable outage is expected.
    • DNS
    • DHCP
    • NTP
    • RT
    • Web proxies
    • Registration system
    • Incoming e-mail
    • Outgoing e-mail
    • IMAP e-mail mailboxes
    • Webmail
    • Mailing lists
    • SMS
    • Provisioning (web proxy autodiscovery)
    • Wi-Fi and VPN authentication
    • CHERTL Evaluation Assistant
    • Network graphs
    • Network monitoring
    • Terminal Four content management system
    • RU Single Sign-On system
    • Main web server (www.ru.ac.za, etc)
    • University administration and meal booking systems
    • SEALS Library consortium services
    • Network printing services (iPrint / PaperCut)
    • File servers/home directories (gnu, serval)
  • Firewalls: software will be updated on the firewalls which connect the Internet to the campus, SEALS and public networks.  As the firewalls operate as a redundant pair, no noticeable outage is expected during this maintenance.
  • Core router software update: the software on one of the two core routers will be updated. No noticeable outage is expected as all network traffic should be handled by the other core router.
  • Storage systems: software on storage systems will be updated.  No noticeable outage is expected, though an unexpected failure during the upgrade would cause an outage affecting almost all services.

While we try to publish a list of all service-affecting work here in advance, the list should not be considered exhaustive and other low impact work may also be undertaken during the maintenance window.

This maintenance work is being undertaken in the ITSC-approved scheduled maintenance window.

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