Juniper JUNOSE 11.3 Configuration Manual Download

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Hotfixes and Standby SRP Modules

Hotfixes are supported in redundant SRP module configurations. Hotfix files are
synchronized between the active and standby SRP modules by both automatic and
manual synchronization. Hotfix activation restrictions are enforced identically on the
active and standby SRP modules. A hotfix that is hot-patchable on the active module is
hot-patchable on the standby module. A hotfix that requires startup activation on the
active SRP module also requires startup activation on the standby SRP module.

Hotfixes are synchronized from the active SRP module to the standby SRP module. The
standby SRP automatically activates the hotfixes that are armed as startup hotfixes.
However, if the synchronization reveals that the set of active hotfixes on the standby
SRP module is different from the set of armed hotfixes on the active SRP module, then
the standby SRP module automatically reboots. This action causes the standby SRP
module to activate the startup hotfixes. When you activate or arm a hotfix for startup
activation, compatibility and dependency checks are performed independently on the
active and standby SRP modules.

Hotfixes and Line Modules

For line modules, a hotfix consists of one or more image fixes specific to a particular
model of module or to a module type, depending on the fix. When a hotfix is activated,
each image fix contained in the hotfix is activated on all applicable modules that are
installed in the router. When existing line modules come online during startup and when
new line modules are inserted in the chassis, image fixes for that particular line module
are requested and activated during module startup.

Line module image hotfixes that have been armed as startup hotfixes are activated
before application configuration occurs on the line module.

Only image fixes contained in hotfixes that are active on the primary SRP module can
be activated on the line modules during startup. Hotfixes that are armed but not active
on the primary SRP module are not activated on line modules.

A hotfix can contain a combination of image fixes. System controller (SC) and interface
controller (IC) image fixes are cumulative and activated in the order in which they were
armed. For forwarding controller (FC) image fixes, the last one armed is the only one
applied.

NOTE:

Because image fixes are activated in a particular order, we recommend

that you create a list of any hotfixes that you are currently running or intend
to run with a new FC image fix. JTAC can then provide you with the correct
order of activation.

A hotfix cannot be partially activated on a router. If activation of any image hotfix fails
on any corresponding module, the entire activation fails for all applicable line modules.
Activation failure results in the generation of an appropriate log message. E Series routers
do not support activation of a hotfix on a per-slot basis or a per-subsystem basis.

Juniper JUNOSE 11.3, Configuration Manual

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