Chapter 18 SNMP
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:
Table 38 SNMP Commands
COMMAND | DESCRIPTION |
Get | Allows the manager to retrieve an object variable from the agent. |
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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. |
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Set | Allows the manager to set values for object variables within an agent. |
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Trap | Used by the agent to inform the manager of some events. |
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18.1.1 Supported MIBs
MIBs let administrators collect statistics and monitor status and performance.
The switch supports the following MIBs:
•RFC 1213 SNMP MIB II
•MIB II - System
•MIB II - Interface
•RFC 1398 MIB -
•RFC 1157 SNMP v1
•RFC 1155 SMI
•RFC 2674 SNMPv2, SNMPv2c
•RFC 2819 RMON
•Group 1 (Statistics)
•Group 2 (History)
•Group 3 (Alarm)
•Gropu 4 (Event)
18.1.2SNMP Traps
The switch sends traps to an SNMP manager when an event occurs. SNMP traps supported are outlined in the following table.
Table 39 SNMP Traps
OBJECT LABEL | OBJECT ID | DESCRIPTION |
SNMPv2 Traps |
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Cold Start | 1.3.6.1.6.3.1.1.5.1 | This trap is sent when the switch is turned on. |
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WarmStart | 1.3.6.1.6.3.1.1.5.2 | This trap is sent when the switch restarts. |
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linkDown | 1.3.6.1.6.3.1.1.5.3 | This trap is sent when the Ethernet link 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 is up. |
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authenticationFailure | 1.3.6.1.6.3.1.1.5.5 | This trap is sent when an SNMP request comes from |
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