Linksys EG24M Switch User Manual


 
10/100 Managed 24-Port GigaSwitch
BRIDGE GROUPS SUPPORTED
The GigaSwitch supports the following four groups of Bridge MIB
(RFC1493):
The dot1dBase Group a mandatory group that contains the objects appli-
cable to all types of bridges.
The dot1dStp Group contains the 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 imple-
ments 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 destina-
tion-address filtering status. This group is applicable to any type of bridge
which performs destination-address filtering.
77
Linksys EtherFast
®
II Series
• Warm start
• Cold start
• Link up
• Link down
• Authentication failure
• Rising alarm
• Falling alarm
• Topology change
MIB-2 defines a set of manageable objects in various layers of the TCP/IP
protocol suites. MIB-2 covers all manageable objects from layer 1 to layer 4
and, as a result, is the major SNMP MIB supported by all vendors in the net-
working industry. The GigaSwitch supports a complete implementation of
SNMP Agent and MIB-2.
RMON MIB (RFC 1757) and Bridge MIB (RFC 1493)
The GigaSwitch 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.
RMON GROUPS SUPPORTED
The GigaSwitch supports the following RMON MIB groups defined in
RFC1757:
• 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 thresh-
old, 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 trig-
gered. The action taken in the Network Management Station depends on the
specific network management application.
76