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C H A P T E R 3 Physical Configuration Guidelines
27
• If an optional module is installed in the expansion slot, the
Expansion Slot Stat LED lights green to indicate the module in the
expansion slot has passed the confidence test and is operating
normally.
• If an optional NMM is installed in the expansion slot, the
Management LEDs light as follows:
– The Stat LED lights green to indicate the NMM has passed the
confidence test and is operating normally.
– The Mstr LED lights green to indicate the NMM is the master
NMM in the stack.
• The Enbl LEDs on each hub in the stack lights green to indicate
that the hub is properly connected to the other hubs in the stack
and is actively managed by an NMM located in one of the hubs in
the stack.
• A Port Status LED for each port on the hub (1-12) and each port
on an optional installed host module (13-24) provides port status.
LED Color Status indications
Hub ports 1–12
and 100BASE-T
host module ports 13-24
Green Link is good, port is not
partitioned.
Amber Link is good, port is partitioned.
Off Link is not detected, port is either
partitioned or not.
Other Items To Check
You can check the following additional items:
• Verify that each connected station operates properly.
• If an NMM is installed:
– Verify that the NMM is installed properly (refer to the
documentation that shipped with your NMM).
– Refer to the documentation that shipped with your 100BASE-T
NMM to verify the operation of the hub through its service
port.