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EtherHub 1500 System User’s Guide
Hardware Description 2-5
Monitor (EtherHub-16i
+
only)
Color: Green
Label: Monitor
Function: Indicates that an SNMP management agent is
connected to and managing the hub
LED Activity Condition Indication
BLINKING ON Hub is connected to and managed by an
Agent.
NO LIGHT OFF Hub is not connected to an Agent.
SNMP (EtherHub-16mi
+
only)
Color: Green
Label: SNMP
Function: Indicates that an SNMP frame is being received by
the Agent
LED Activity Condition Indication
BLINKING LIGHT ON Hub is presently receiving an SNMP frame.
NO LIGHT OFF Hub is not receiving an SNMP frame.
In a stacked system where a Master and Slave agent exist, the
SNMP LED of the active agent will blink if an SNMP frame is
received. Normally, this would mean that the Master agent’s
SNMP LED will be ON. However, if the Master agent fails, the
Slave agent’s SNMP LED should light up. See the section on
Master Agent in Chapter 4 for related information.