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Hotfix Compatibility and Dependency
Hotfixes can have compatibility and dependency
requirements. A given hotfix is compatible with one or more releases.
It can be dependent on one or more other hotfixes being active. Compatibility
and dependency requirements are stored as part of the hotfix. The
requirements are enforced at the time of arming or activation. If
the software installed and active on the router does not match the
requirements specified in the hotfix, then activation of the hotfix
fails. Such a failure generates appropriate error and log messages.
The following restrictions can apply to a hotfix:
- Dependency—A hotfix that must be active or armed
before another hotfix can be activated or armed.
- Safe With—A list of hotfixes with which another
hotfix is compatible and can safely be concurrently armed or activated.
This list applies only to hotfixes that have some patched functionality
in common and are armed or activated concurrently.
- Unsafe With—A list of hotfixes with which another
hotfix is not compatible and cannot safely be concurrently armed or
activated. The CLI displays a warning message when you try to activate a
hotfix that is unsafe with one or more active or armed hotfixes.
- Manual Activate [Active / Standby] Srp—The name
of a binary flag that indicates whether manual activation of the hotfix
is allowed on the active and standby SRP modules. When the flag is
set to false, you cannot manually activate the hotfix; instead, the
hotfix can only be activated as a startup hotfix. The CLI displays
a warning message when you try to activate a
hotfix that cannot be manually activated.
- Manual Deactivate [Active / Standby] Srp—The name
of a binary flag that indicates whether manual deactivation of the
hotfix is allowed on the active and standby SRP modules. When the
flag is set to false, you cannot manually deactivate the hotfix. You
must disarm the hotfix and reload the router. The CLI displays a warning
message when you try to deactivate a
hotfix that cannot be manually deactivated.
- Line card requires reload—The name of a binary flag
that indicates whether line modules require a reload for the hotfix
to become active on the module. The CLI displays a warning message
if the line modules must be reloaded. If the warning is confirmed,
the SRP module reloads each line module. The flag applies to all line
modules targeted by the hotfix that are installed in the router.
Hotfixes remain armed only for compatible releases.
If you change the armed release by issuing the boot system command, hotfixes that are not compatible with the new release are
no longer armed. However, if you subsequently rearm a compatible release,
the previously armed hotfixes for that release are automatically armed
again.
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