Troubleshooting
Diagnostic Tools
Diagnostic Tools
Diagnostic Features
Feature Default Menu CLI Web
Port Auto negotiation n/a n/a n/a n/a
Ping Test n/a — page C-48 page C-47
Link Test n/a — page C-48 page C-47
Display Config File n/a — page C-57 page C-58
Admin. and Troubleshooting n/a — page C-60 —
Commands
Factory-Default Config page C-64 — page C-64 —
(Buttons)
Port Status n/a pages B-11 pages B-11 pages B-11
and B-12 and B-12 and B-12
Port Auto-Negotiation
When a link LED does not light (indicating loss of link between two devices),
the most common reason is a failure of port auto-negotiation between the
connecting ports. If a link LED fails to light when you connect the switch to a
port on another device, do the following:
1. Ensure that the switch port and the port on the attached end-node are
both set to Auto mode.
2. If the attached end-node does not have an Auto mode setting, then you
must manually configure the switch port to the same setting as the end-
node port. Refer to Chapter 10, “Port Status and Configuration”.
Ping and Link Tests
The Ping test and the Link test are point-to-point tests between your switch
and another IEEE 802.3-compliant device on your network. These tests can
tell you whether the switch is communicating properly with another device.
C-45
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