Avaya Configuring SNMP, BOOTP, DHCP, and RARP Services Uživatelský manuál stáhnout pdf (Strana 24)

Configuring SNMP, BOOTP, DHCP, and RARP Services

1-6

SNMP Implementation Notes

This section contains information about features speciﬁc to the Bay Networks

implementation of SNMP.

Internet Protocol (IP)

SNMP uses the User Datagram Protocol (UDP) to transport its messages. You

must enable IP in order to use UDP and SNMP.

Thresholds

SNMP uses a MIB (Management Information Base) to manage the router. The

MIB includes an extensive collection of statistics (MIB variables) that track the

router’s performance and provide early warnings of abnormal operating

conditions.

With the Site Manager threshold feature, you can conﬁgure the agent to

automatically notify the network manager when speciﬁc statistics (or instances of

the variable) reach certain levels.

You can set a threshold for any integer, counter, gauge, or time-tick variable in the

MIB. Using the threshold parameters (refer to “Editing Threshold Parameters”

later in this chapter), you select the polling interval, which speciﬁes how often the

agent checks the statistic to see if its value has reached the threshold. You also set

three threshold values (high, medium, and low) and specify the threshold action as

Lessthan or Greaterthan (refer to “Threshold Example,” later in this chapter).

When the statistic reaches the threshold, the agent generates an event. You specify

the severity level at which you want the manager to log the event. Table 1-1 lists

the available severity levels and their suggested meanings. Depending on how you

conﬁgure the SNMP trap parameters (refer to “Conﬁguring Traps” later in this

chapter), the agent may also send the threshold exception as an SNMP trap.

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Avaya Configuring SNMP, BOOTP, DHCP, and RARP Services Uživatelský manuál Strana 24