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5.3
RMON MIB (RFC 2819) AND BRIDGE MIB (RFC 1493)
The switch provides hardware-based RMON counters in the switch chipset. The switch manager CPU
polls these counters periodically to collect the statistics in a format that complies with the RMON MIB
definition.
5.3.1
RMON GROUPS SUPPORTED
The switch supports the following RMON MIB groups defined in RFC 2819:
•
RMON Statistics Group – maintains utilization and error statistics for the switch port being
monitored.
•
RMON History Group – gathers and stores periodic statistical samples from the previous
Statistics Group.
•
RMON Alarm Group – allows a network administrator to define alarm thresholds for any MIB
variable. An alarm can be associated with Low Threshold, High Threshold, or both. A trigger
can trigger an alarm when the value of a specific MIB variable exceeds a threshold, falls
below a threshold, or exceeds or falls below a threshold.
•
RMON Event Group – allows a network administrator to define actions based on alarms.
SNMP Traps are generated when RMON Alarms are triggered. The action taken in the
Network Management Station depends on the specific network management application
5.3.2
BRIDGE GROUPS SUPPORTED
The switch supports the following four groups of Bridge MIB (RFC 1493):
•
The dot1dBase Group – a mandatory group that contains the objects applicable to all types of
bridges.
•
The dot1dStp Group – contains objects that denote the bridge's state with respect to the
Spanning Tree Protocol. If a node does not implement the Spanning Tree Protocol, this group
will not be implemented. This group is applicable to any transparent only, source route, or
SRT bridge that implements the Spanning Tree Protocol.
•
The dot1dTp Group – contains objects that describe the entity's transparent bridging status.
This group is applicable to transparent operation only and SRT bridges.
•
The dot1dStatic Group – contains objects that describe the entity's destination-address
filtering status. This group is applicable to any type of bridge which performs destination-
address filtering.
PAGE 21
OSD2700SFP OPERATOR MANUAL
OPTICAL SYSTEMS DESIGN
DOC ID: 10112704
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