
Connecting BayStack AN and ANH Systems to a Network
6-26 114074 Rev. A
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 Disabled before you
enable the DCM as described in the “
Activating DCM” section.
Some RMON network management applications expect the DCM to set up a Host
configuration, while others set up their own configurations.
The Host configuration requires 148 bytes. The Host data requires 105 bytes of
memory per host address the DCM detects on a segment.
You specify the maximum number of host addresses that appear in the Host
configuration by setting the RMON Max Host parameter when you enable a
DCM. If there is not enough memory for the number of hosts you request, the
RMON agent sets the RMON Max Host parameter to the highest possible value.
The number of addresses can range from 100 to 8,128, depending on the DCM
memory configuration.
Table 6-2 shows recommended values for this parameter.
Note: The RMON agent allows you to create only one Host configuration. Be
sure to set the RMON Default Host parameter according to the expectations of
the RMON network management application.
Table 6-2. Maximum Number of Hosts
Installed DRAM (MB) Maximum Number of Hosts
2–4 2,048
5–8 4,096
9–16 8,128
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