Bay Networks Remote Annex Guía de instalación descargar pdf (Pagina 110)

Nortel Networks 5399 Access Switch Hardware Installation Guide

Chapter 4 Troubleshooting Procedures

4-18

The supervisory module, located in slot 0 of the 5000 hub, performs

several functions for the hub and the modules installed in the hub. The

supervisory module stores the primary configurations of all modules

installed in the hub. Each user-installed module also stores a working

copy of its configuration information. When a change is made to this

workingcopy,the modulestoresthenewuserconfigurationinitsonboard

nonvolatile memory.

The supervisory module periodically polls user-installed modules in the

hub across the Common Management Bus (CMB). As part of the poll,

the NMM collects module configuration information and stores the

information in its local nonvolatile memory for use in comparing and/or

restoring a module configuration after a power cycle or reset.

What happens to a module when it is inserted in the hub depends on a

combination of conditions:

• If you remove a module, change jumper settings, and

reinsert the module in its original slot, the new jumper

settings take effect immediately. The supervisory module

records the new configuration information in its nonvolatile

memory.

• If you replace a module in a slot with a different type of

module, the new module is directed to use its default

configuration.

• If the supervisory module is not operational, a module

whose configured slot number matches its installed location

can use its own stored configuration; otherwise, the module

reverts to its default configuration.

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Bay Networks Remote Annex Guía de instalación Pagina 110