ES-4024A Series Switch Support Notes
requirements. Each group is optional so that vendors do not need to support all the groups within the Management Information Base (MIB). Some RMON groups require support of other RMON groups to function properly. Table 1 summarizes the nine monitoring groups specified in the RFC 1757 Ethernet
RMON MIB.
Table 1: RMON Monitoring Groups
RMON 1 | Function | Elements |
MIB |
|
|
Group |
|
|
Statistics | Contains statistics | Packets dropped, packets sent, bytes |
| measured by the | sent (octets), broadcast packets, |
| probe for each | multicast packets, CRC errors, runts, |
| monitored interface | giants, fragments, jabbers, collisions, |
| on this device. | and counters for packets ranging from |
|
| 64 to 128, 128 to 256, 256 to 512, 512 |
|
| to 1024, and 1024 to 1518 bytes. |
History | Records periodic | Sample period, number of samples, |
| statistical samples | items sampled. |
| from a network and |
|
| stores for retrieval. |
|
Alarm | Periodically takes | Includes the alarm table and requires |
| statistical samples | the implementation of the event group. |
| and compares them | Alarm type, interval, starting threshold, |
| with set thresholds for | stop threshold. |
| events generation. |
|
Host | Contains statistics | Host address, packets, and bytes |
| associated with each | received and transmitted, as well as |
| host discovered on | broadcast, multicast, and error packets. |
| the network. |
|
HostTopN | Prepares tables that | Statistics, host(s), sample start and |
| describe the top | stop periods, rate base, duration. |
| hosts. |
|
|
| 116 |
All contents copyright (c) 2006 ZyXEL Communications Corporation.
