Chapter 6. Configuring PNNI Parameters
The chapter describes how PNNI configuration changes are managed, and how they are made.
Note: You must have PNNI control point code is order to use the functions described in this chapter.
Configuration Control Mechanism
Unlike other configuration parameters, which are implemented as soon as the SET command is issued,
PNNI stores the new parameter values until instructed to implement them.
A default configuration is provided with the PNNI Control Point code, and activated when is powered on or
reset. All configurable parameter values for this configuration are stored in a non-volatile storage (NVS)
area called the
NVS Configuration repository. These parameters are copied into the Active Configuration
repository when the 8265 is powered on (and every time the ATM subsystem is reset) and used by the
active PNNI system.
A
Future Configuration repository is provided that allows you to enter changes to the current configuration.
These changes are kept in memory until you instruct PNNI to implement them.
PNNI only accepts parameter changes if the parameter value lies within the correct range and is
consistent with all the other, already configured parameter values. PNNI thus assures that the new
configuration will be consistent.
NVS
Configuration
Future
Configuration
Active
Configuration
New
parameters
Parameters used by
active PNNI system
Parameters loaded at
power-on or after reset
Non-critical changes passed
directly to active system
Critical changes passed
to NVS respository
Parameters passed to Active
Configuration repository
Figure 6. PNNI Configuration Update Mechanism
Once you have set all the parameters you wish to configure, you issue an instruction for them to be
implemented.
What happens next depends on whether the configuration changes are deemed to be critical or not.
Critical settings are deemed those that, when reconfigured, affect PNNI to such an extent that the ATM
subsystem must be restarted (such as ATM address, for example).
Copyright IBM Corp. 1994, 1998
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