Chapter 6 Advanced Screen
The managed devices contain object variables/managed objects that define each piece of information to be collected about a device. Examples of variables include such as number of packets received, node port status etc. A Management Information Base (MIB) is a collection of managed objects. SNMP allows a manager and agents to communicate for the purpose of accessing these objects.
SNMP itself is a simple request/response protocol based on the manager/agent model. The manager issues a request and the agent returns responses using the following protocol operations:
•Get - Allows the manager to retrieve an object variable from the agent.
•GetNext - Allows the manager to retrieve the next object variable from a table or list within an agent. In SNMPv1, when a manager wants to retrieve all elements of a table from an agent, it initiates a Get operation, followed by a series of GetNext operations.
•Set - Allows the manager to set values for object variables within an agent.
•Trap - Used by the agent to inform the manager of some events.
6.1.1SNMP Traps
The
Table 20 SNMP Traps
TRAP NAME | DESCRIPTION |
Configured and connected APs of | This trap is sent when an AP is disconnected or connected |
channel [<channel number>] | from/to the WLAN controller. |
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AP <ap number in hex base> has | This trap is sent when an AP is connected to the WLAN |
been connected | controller. |
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AP <ap number in hex base> has | This trap is sent when an AP is disconnected from the WLAN |
been disconnected | controller. |
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Reference Host is up | This trap is sent when the referenced host is up. |
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Reference Host is down | This trap is sent when the referenced host is down. |
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Standby Switch is up | This trap is sent when the backup WLAN controller is up. |
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Standby Switch is down | This trap is sent when the backup WLAN controller is down. |
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Inactive - Reference Host is down | This trap is sent when the referenced host is down and the main |
| WLAN controller becomes inactive. |
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Inactive Standby Switch - Main | This trap is sent when the backup WLAN controller is deactived |
Switch is up | because the main WLAN controller becomes active. |
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Main Switch is active again | This trap is sent when the main WLAN controller becomes |
| active again. |
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Failure detected in Main Switch - | This trap is sent when the main WLAN controller is down and |
Switching Over | then the backup WLAN controller is enabled. |
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6.2 Configuring the Advanced Screen
Click Advanced to display the screen as shown.
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