HP aruba 9300-32D Series, Руководство по установке и началу работы

Страница: 42 / 57

Chapter 5
Troubleshooting
Troubleshooting
This chapter describes how to troubleshoot your switch. This document describes troubleshooting primarily
from a hardware perspective. You can perform more in-depth troubleshooting on these devices using the
software tools available with the switches, including the full-featured console interface, the built-in web
browser interface, Aruba Central, or Aruba AirWave.
This chapter describes the following:
n
Basic Troubleshooting Tips on page 42
n
Diagnosing with the LEDs on page 43
n
Hardware Diagnostic Tests on page 45
n
Accessing Updates on page 56
n
Accessing Aruba Support on page 56
Basic Troubleshooting Tips
Most problems are caused by the following situations. Check for these items first when starting your
troubleshooting:
n
Faulty or loose cables. Look for loose or obviously faulty connections. If the cables appear to be OK, make
sure the connections are snug. If that does not correct the problem, try a different cable.
n
Non-standard cables. Non-standard and miswired cables may cause network collisions and other network
problems, and can seriously impair network performance. Use a new correctly-wired cable or compare your
cable to the
Cabling Specifications
n
Improper network topologies. It is important to make sure you have a valid network topology. Common
topology faults include excessive cable length and excessive repeater delays between end nodes. If you have
network problems after recent changes to the network, change back to the previous topology. If you no
longer experience the problems, the new topology is most likely at fault.
In addition, you should make sure that your network topology contains no data path loops . Between any
two end nodes, there should be only one active cabling path at any time. Data path loops can cause
broadcast storms that will severely impact your network performance.
For your switch, if you want to build redundant paths between important nodes in your network to provide
some fault tolerance, you should enable
Spanning Tree Protocol support on the switch. This ensures that
only one of the redundant paths is active at any time, thus avoiding data path loops. Spanning Tree can be
enabled through the switch console or the web browser interface. For more information on Spanning Tree,
see the Layer 2 Bridging Guide for your switch.
By default, ports do not run selftest at boot. To enable port selftest on boot, save the no fastboot
configuration to the switch. See AOS-CX software documentation for further detail.
Aruba 9300-32D Switch Series | Installation and Getting Started Guide 42