ZyXEL Communications VES-1000 Series, Руководство пользователя, Страница: 76 / 227

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.