ZyXEL Communications VES-1012 - Betriebsanweisung PDF herunterladen (Seite 76)

VES-1000 Series Ethernet Switch

9-2 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 9-1 SNMP Commands

COMMAND DESCRIPTION

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.

9.1.1 Supported MIBs

MIBs let administrators collect statistics and monitor status and performance.

The VES supports the following MIBs:

 SNMP MIB II (RFC 1213)  RFC 1157 SNMP v1

 RFC 1493 Bridge MIBs  RFC 1643 Ethernet MIBs

 RFC 1155 SMI  SNMPv2, SNMPv2c

 Bridge extension MIBs RFC 2674

9.1.2 SNMP Traps

The VES sends traps to an SNMP manager when an event occurs. SNMP traps supported are outlined in the

following table.

Table 9-2 SNMP Traps

GENERIC TRAP SPECIFIC TRAP DESCRIPTION

0 (Cold Start) 0 This trap is sent when the VES is turned on.

1 (WarmStart) 0 This trap is sent when the VES restarts.

2 (linkDown) 0 This trap is sent when the Ethernet link is down.

3 (linkUp) 0 This trap is sent when the Ethernet link is up.

4 (authenticationFailure) 0 This trap is sent when an SNMP request comes from non-

authenticated hosts.

9.1.3 Configuring SNMP

From the Access Control screen, display the SNMP screen. You can click Access Control to go back to the

Access Control screen.

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