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This chapter describes the discovery process and lists equipment and data elements that are discovered for this release.
In the discovery process, ViewRunner learns details about the Cisco 6100 Series system configuration and status. By default, ViewRunner automatically discovers a node when you open the Chassis View. This option can be enabled or disabled in the ViewRunner Preferences dialog box. Access this dialog box from the Options drop-down menu on the ViewRunner toolbar.
In addition, you can invoke ViewRunner discovery manually using the Discovery menu option. When ViewRunner discovers a node, it redraws the Chassis View with the updated configuration.
ViewRunner for Windows queries the system controller (SC) module using the Simple Network Management Protocol (SNMP) get command for the Management Information Base (MIB) values. It does this when the system starts up or when you prompt it to do so. After new modules are installed, use the Discover menu option in ViewRunner to view them in the Chassis View.
Discovery within the Cisco 6100 Series system is the automated process by which the SC module captures inventory and configuration information about Cisco 6100 Series chassis and modules. ViewRunner performs discovery when you insert a module into the Cisco 6100 Series system or when you reset the SC module.
During discovery, the following steps take place within the Cisco 6100 Series system:
Each module and chassis is equipped with a Flash erasable programmable read-only memory (EPROM). The EPROM is programmed at the factory with the following read-only attributes:
These attributes are sent to the SC module during the discovery process.
CAP ATU-C, DMT-2 ATU-C and STU-C modules also return the following transceiver information:
After the ViewRunner detects a chassis or module, the Cisco 6100 Series SNMP agent automatically creates a configuration for the chassis or slot if one is not already present. The Administrative state for this configuration is set to Locked.
A Cisco 6100 Series chassis or module configuration is created whenever all of the following conditions occur:
The ViewRunner infers the presence of a Cisco 6100 Series multiplexer chassis (MC) if an SC module is present. The Cisco 6100 Series system requires that a line interface module (LIM) controller module be equipped in the line concentration chassis (LCC) if the LCC is present. The LIM controller forwards all LIM notifications to the SC module.
ViewRunner for Windows discovers the following Cisco 6100 Series system components:
If you remove a module and either leave the slot empty, or insert a new module into the slot of the old module without unlocking the module (see "Cisco 6100 Series System and ViewRunner State Management"), the originally discovered module and its default configuration settings remain in the system configuration. Likewise, if you modify a chassis ID DIP switch setting without following state management procedures, only the original DIP switch settings are stored by the Cisco 6100 Series SNMP agent.
For the newly detected module to be discovered with its correct configuration settings, you must first delete the old slot configuration, because the SC module actively polls slots as part of fault detection. If you remove a module without following state management procedures, the SC module assumes the module is present, but has failed, and an alarm is generated. For more information on alarm management, see the Cisco 6100 Series Alarm Summary Guide.
To learn more about deleting modules, see "Deleting System Components."
During discovery, ViewRunner for Windows queries the Cisco 6100 Series SNMP agent for the modules that have been discovered. After ViewRunner for Windows gets this information from the agent, it displays the front chassis and module faceplates of the Cisco 6100 Series system in its graphical user interface.
ViewRunner for Windows also supports querying the agent for discovered chassis/modules after the application has started. To use this option, select Discover on the toolbar of the ViewRunner or from the Discover icon in the Chassis View. ViewRunner for Windows displays each of the chassis/module attributes described in Section 2.2.1.
Figure 2-1 shows a sample display of discovered chassis and modules.
Posted: Tue Dec 7 16:10:21 PST 1999
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