firmware management enforces a policy in which all domains within a
or maintenance group (v1.5 and above), run a consistent version of the firmware
and hardware capability catalog. Enable a global policy resolution when you
want to enforce consistent versions of infrastructure firmware among all
domains in a domain group, or maintenance group.
Cisco UCS Central has two different methods for identifying a domain. Prior to v1.4,
the firmware update mechanism was based on the domain group assignment on the
domain. Now, the update depends on the tag assigned to the domain. If you tag
all of the domains with the same Maintenance Group tag, they are upgraded
together. If you tag all of the domains in a domain group, and include all
sub-domain groups, they are upgraded together.
When a domain group,
or maintenance group, consists of multiple
Cisco UCS domains, and you have switched to a global firmware management control
policy, be careful of any operational (global) firmware policy changes to that
Cisco UCS Central tries to upgrade all domains that are members of that domain
group, or maintenance group, along with any subdomain groups, as defined in the
maintenance policy. The default maintenance policy behavior requires user
acknowledgment before any updates occur. You can override this behavior by
scheduling an acknowledgment or performing an immediate acknowledgment.