Cisco 2950G 24 Software Configuration Guide - Page 116
DeviceID, Host Name and DeviceID, Using Host Name, and ConfigID, after, before, value, Cisco
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Understanding IE2100 Series Configuration Registrar Software Chapter 5 Configuring IE2100 CNS Agents DeviceID Each configured switch participating on the event bus has a unique deviceID, which is analogous to the switch source address so that the switch can be targeted as a specific destination on the bus. All switches configured with the cns config partial global configuration command must access the event bus. Therefore, the deviceID, as originated on the switch, must match the deviceID of the corresponding switch definition in the Configuration Registrar. The origin of the deviceID is defined by the Cisco IOS host name of the switch. However, the deviceID variable and its usage reside within the event gateway, which is adjacent to the switch. The logical Cisco IOS termination point on the event bus is embedded in the event gateway, which in turn functions as a proxy on behalf of the switch. The event gateway represents the switch and its corresponding deviceID to the event bus. The switch declares its host name to the event gateway immediately after the successful connection to the event gateway. The event gateway couples the deviceID value to the Cisco IOS host name each time this connection is established. The event gateway caches this deviceID value for the duration of its connection to the switch. Host Name and DeviceID The deviceID is fixed at the time of the connection to the event gateway and does not change even when the switch host name is reconfigured. When changing the switch host name on the switch, the only way to refresh the deviceID is to break the connection between the switch and the event gateway. Enter the no cns event global configuration command followed by the cns event global configuration command. When the connection is re-established, the switch sends its modified host name to the event gateway. The event gateway redefines the deviceID to the new value. Caution When using the Configuration Registrar user interface, you must first set the deviceID field to the host name value that the switch acquires after-not before-you use the cns config initial global configuration command at the switch. Otherwise, subsequent cns config partial global configuration command operations malfunction. Using Host Name, DeviceID, and ConfigID In standalone mode, when a host name value is set for a switch, the configuration server uses the host name as the deviceID when an event is sent on host name. If the host name has not been set, the event is sent on the cn= of the device. In server mode, the host name is not used. In this mode, the unique deviceID attribute is always used for sending an event on the bus. If this attribute is not set, you cannot update the switch. These and other associated attributes (tag value pairs) are set when you run Setup on the Configuration Registrar. Note For more information about running the setup program on the Configuration Registrar, refer to the Cisco Intelligence Engine 2100 Series Configuration Registrar Manual. Catalyst 2950 Desktop Switch Software Configuration Guide 5-4 78-14982-01