Avaya Configuring SNMP, BOOTP, DHCP, and RARP Services Uživatelský manuál stáhnout pdf (Strana 30)

Configuring SNMP, BOOTP, DHCP, and RARP Services

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If you create multiple conﬁgurations, it is possible to collect the same set of

statistics for the same interface in multiple data tables. The absolute values of

those statistics may vary from table to table, since the baseline of each statistics

counter occurs when you create a conﬁguration. You may prefer, however, to use

only one Statistics conﬁguration, to conserve memory for other RMON groups.

You need 200 bytes of memory for each Statistics conﬁguration.

History Group

When you enable the DCM, the RMON agent automatically creates a History

conﬁguration that collects History data at two intervals. The ﬁrst conﬁguration

provides short-term history by sampling statistics every 30 seconds and holding

up to 50 samples (in RMON terms, “buckets”). The second conﬁguration provides

long-term history by sampling statistics every 30 minutes and holding up to 50

buckets.

Through your RMON network management application, you can create as many

History conﬁgurations as memory permits, up to the RMON limit of 65,535

conﬁgurations.You can also set the number of buckets a particular History

conﬁguration uses to as many as available memory allows. If you request more

buckets than memory allows, the agent allocates enough buckets to ﬁll available

memory.

You need 504 bytes of memory for each History conﬁguration (252 bytes each for

the short-term and long-term History conﬁgurations).

The History data requires 52 bytes of memory per bucket. You calculate the total

memory (in bytes) you need to store the data as follows:

Number of buckets * 52 * 2 History conﬁgurations

This calculation shows that you need approximately 5.1 KB for the default setting

of 50 buckets.

Host Group

When you enable the DCM, the default setting (Enabled) for the RMON Default

Host parameter creates a Host conﬁguration. To prevent creation of a Host

conﬁguration, set the RMON Default Host parameter to Disable before you

enable the DCM (refer to Connecting AN and ANH Systems to a Network for

details).

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Avaya Configuring SNMP, BOOTP, DHCP, and RARP Services Uživatelský manuál Strana 30