
SNMP, RMON, BOOTP, DHCP, and RARP Concepts
114070 Rev. B 2-21
The Host configuration requires 148 bytes. The Host data requires 105 bytes of
memory per host address the Ethernet 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 an
Ethernet 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 hosts,
depending on the Ethernet DCM memory configuration. T
able 2-4 shows
recommended values for this parameter.
You calculate the total memory (in bytes) you need for the host data as follows:
105 * value of the RMON Max Host parameter
HostTopN Group
To save memory and increase performance, there is no default configuration for
the HostTopN group. You must create HostTopN configurations through your
RMON network management application. You can create as many HostTopN
configurations as memory permits, up to the RMON limit of 65,535
configurations.
Each HostTopN configuration requires 164 bytes. The HostTopN data requires 10
bytes of memory per host address the Ethernet DCM detects on a segment.
Table 2-4. Maximum Number of Hosts
Installed DRAM (MB)
Maximum Number of
Hosts
2–4 2,048
5–8 4,096
9–16 8,128
Note: Before you create a HostTopN configuration, you must create a Host
configuration.
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