On Wednesday, July 23rd between 6AM – 7AM PDT, the primary authoritative DNS Server will be taken offline for scheduled maintenance. During this time, any dynamic or manual updates to the DNS server for all domains administered by LBNL will be unavailable. Registration of names for dynamically addressed clients (DHCP clients) will be disrupted as well.
While the DHCP service itself will not be affected, hosts which are dynamically addressed will not be able to dynamically update their DNS records (DDNS). As part of this upgrade, critical operating system updates will be applied to the authoritative DNS server requiring multiple reboots which have the potential to cause lingering effects to the resolution of dynamically addressed clients.
As the authoritative DNS server goes offline for these updates, DHCP servers which serve addresses to clients will not be able to provide name updates to the DNS service. This is in part due to the nature of DDNS where name updates received from a DHCP client are forwarded (via the DHCP server) on to the primary authoritative DNS server for updating DNS resolution.
During the maintenance window, any new or changing name updates for dynamically addressed clients will not be updated in the DNS service. Existing records are not expected to be impacted but some lingering effects may occur. Users who contact dynamically addressed hosts by their DDNS names (hosts with .dhcp. or .dhcp6. in their name) should ensure that name resolution of the host is successful after the maintenance window has ended.
Users experiencing continuing issues with name resolution of dynamically addressed hosts should attempt to release and renew the IP address of the affected system. If problems persist, please email lblnet@lbl.gov for assistance.
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