Chapter 16 Remote Management Screens
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 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.
16.8.2Supported MIBs
The NWA supports MIB II that is defined in
16.8.3 SNMP Traps
SNMP traps are messages sent by the agents of each managed device to the SNMP manager. These messages inform the administrator of events in data networks handled by the device. The NWA can send the following traps to the SNMP manager.
Table 61 | SNMP Traps |
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TRAP NAME | OBJECT IDENTIFIER # | DESCRIPTION | ||
(OID) | ||||
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Generic Traps |
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coldStart |
| 1.3.6.1.6.3.1.1.5.1 | This trap is sent after booting (power | |
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| on). This trap is defined in | |
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warmStart |
| 1.3.6.1.6.3.1.1.5.2 | This trap is sent after booting (software | |
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| reboot). This trap is defined in RFC- | |
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| 1215. | |
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linkDown |
| 1.3.6.1.6.3.1.1.5.3 | This trap is sent when the Ethernet link | |
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| is down. | |
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linkUp |
| 1.3.6.1.6.3.1.1.5.4 | This trap is sent when the Ethernet link | |
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| is up. | |
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196 |
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