Chapter 4: Troubleshooting; Checking Lldp Status; Checking Power Over Ethernet Status - Extreme Networks ReachNXT 100-8t User Manual

4 Troubleshooting
This chapter describes techniques for troubleshooting the installation of the ReachNXT 100-8t port
extender. It includes the following sections:
Checking LLDP Status on page 23
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Checking Power over Ethernet Status on page 23
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Viewing EMS Messages on page 24
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Checking LLDP Status

The ReachNXT 100-8t uses LLDP to communicate with the uplinked ExtremeXOS switch. It operates
only when it detects an ExtremeXOS switch connected to its uplink port via LLDP. The ReachNXT
100-8t sends LLDP Data Units (LLDPDUs) to the uplinked switch every 30 seconds, with a time to last
(TTL) of 120 seconds. The LLDPDUs contain TLVs for Chassis ID, Port ID, TTL, System Name, and
System Description.
LLDP must be enabled on the uplinked ExtremeXOS switch. On the switch, you can use the show lldp
neighbors command to get information about the downlinked ReachNXT 100-8t. The information
received from the ReachNXT 100-8t is similar to the following:
Slot-1 Stack.27 # show lldp neighbors detailed
--------------------------------------------------------------------------
LLDP Port 4:1 detected 1 neighbor
Neighbor: 00:04:96:1F:A8:00/9, age 29 seconds
- Chassis ID type: MAC address (4)
Chassis ID
- Port ID type: ifName (5)
Port ID : "9"
- Time To Live: 120 seconds
- System Name: "Reach 100-8t 800284-00-01 0840G-00560"
- System Description: "Reach 100-8t 1.6.1.6"
The System Name TLV includes the serial number of the ReachNXT 100-8t unit. The System Description
TLV includes the firmware version running on the ReachNXT 100-8t.

Checking Power over Ethernet Status

When the ReachNXT 100-8t is connected to the ExtremeXOS switch using the Gigabit uplink port (port
9), it can be powered through Power over Ethernet (PoE) supplied by the uplinked ExtremeXOS switch.
On the ExtremeXOS switch, PoE must be enabled for the port that is connected to the ReachNXT 100-8t.
ReachNXT 100-8t User Guide
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