HP Cluster Platform Interconnects v2010 Gigabit Ethernet Interconnect Guide - Page 73

12 Troubleshooting

This chapter provides basic Ethernet troubleshooting tips (

Section 12.1

).

12.1 Basic Ethernet Troubleshooting Tips

Most Ethernet problems are caused by the following situations. Check for these items first when

starting your troubleshooting:

•

Faulty or loose cables. Look for loose or obviously faulty connections. If they appear to be

undamaged, make sure the connections are snug. If that does not correct the problem, try

a different cable.

•

Nonstandard cables. Nonstandard and incorrectly wired cables may cause network collisions

and other network problems, and can seriously impair network performance. A category 5

cable tester is recommended for every 100Base-TX and 1000Base-T network installation.

•

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 probably 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 will cause broadcast storms that will severely

impact your network performance.

•

Port configuration. Check the port configurations. A port on your HP ProCurve switch may

not be operating as you expect because it has been put into a “blocking” state, or the port

may have been configured as disabled through software. Use the switch console to determine

the port's configuration and verify that there is not an improper or undesired configuration

of any of the switch features that may be affecting the port. For more information, refer to

the

Management and Configuration Guide

, which is on the HP ProCurve switch documentation

CD.

•

Duplex configuration. Make sure that all devices connected to the HP ProCurve switch are

configured either to auto-negotiate or to connect at half duplex. If a device connected to the

switch has a fixed configuration at full duplex, the device will not connect correctly to the

switch. The result will be high error rates and inefficient communications between the switch

and the device.

For more information on possible network problems and their solutions, see the technical note

Troubleshooting LAN Performance and Intermittent Connectivity Problems

, which can be found on

the HP ProCurve Web site,

http://www

.hp.com/go/hpProCurv

e/

, in the Information Library

section.

12.1 Basic Ethernet Troubleshooting Tips

73

Section	Page
Gigabit Ethernet Interconnect Guide	1
Table of Contents	3
About This Manual	7
Audience	7
Organization	7
Additional Documentation	7
HP Encourages Your Comments	10
Related Documentation	10
Cluster Component Documentation	10
World-Wide Web Resources	10
Conventions	11
1 Gigabit Ethernet Solutions Overview	12
1.1 Supported Gigabit Ethernet Interconnects	12
1.2 Gigabit Ethernet Solution Possibilities	13
1.3 Gigabit Ethernet Solution Possibilities (used in older versions of HP CPxxxx)	13
1.4 High-density Configuration Solutions	14
1.5 High-density Configuration Solutions (used in older versions of HP CPxxxx)	15
1.6 Modular Configuration Solutions	16
2 HP ProCurve 2650	18
2.1 HP ProCurve 2650 Overview	18
2.2 ProCurve 2650 LEDs and Buttons	19
2.2.1 Reset Button	21
2.2.2 Clear Button	21
2.2.3 LED Diagnostics	21
3 HP ProCurve 2800 Series	23
3.1 HP ProCurve 2824 Overview	23
3.1.1 HP ProCurve 2824 Front View	23
3.1.2 HP ProCurve 2824 Rear View	24
3.2 HP ProCurve 2848 Overview	24
3.2.1 Front Panel	24
3.2.2 Rear Panel	25
3.3 HP ProCurve 2800 Series LEDs and Buttons	26
3.3.1 Reset Button	27
3.3.2 Clear Button	28
3.3.3 ProCurve 2800 Series LED Diagnostics	28
4 HP ProCurve 3500yl Series	29
4.1 HP ProCurve 3500yl-24G-PWR Overview	30
4.2 HP ProCurve 3500yl-48G-PWR Overview	31
4.3 HP ProCurve 3500yl Series LEDs	32
4.4 ProCurve Switch 10-GbE yl Module	32
4.5 Installing an HP ProCurve 3500yl Series in a Rack	33
5 HP ProCurve 5308xl	34
5.1 ProCurve 5308xl Features	34
5.1.1 ProCurve 5308xl LEDs and Ports	35
5.1.2 ProCurve 5308xl Rear View	36
5.1.3 Self Test	37
5.2 ProCurve 10/100/1000–T xl Module	38
5.3 Installing a Switch Module	39
5.4 Replacing or Removing a Switch Module	40
5.5 Installing a Second Power Supply	40
5.5.1 Installation Precautions	40
5.5.2 Installation Steps	41
5.6 Installing a ProCurve 5308xl in a Rack	43
6 HP ProCurve 5400zl Series	47
6.1 HP ProCurve 5406zl Overview	48
6.2 HP ProCurve 5412zl Overview	49
6.3 HP ProCurve Switch 5400zl 24 port Gig-T PoE Module	51
6.4 HP ProCurve 5400zl Series 4-port 10-GbE Switch Module	52
6.5 ProCurve 5400zl Series LEDs	53
6.6 Installing a ProCurve 5400zl Series in a Rack	53
6.7 Replacing a ProCurve 5400zl Series	53
7 HP ProCurve 6400cl	54
7.1 ProCurve 6400cl LEDs	55
7.2 Removing a ProCurve 6400cl from a Rack	56
8 HP ProCurve 9300 Series	57
8.1 ProCurve 9300 Series Overview	57
8.1.1 ProCurve 9304M	58
8.1.2 ProCurve 9308M	59
8.1.3 ProCurve 9315M	59
8.2 Chassis Modules	60
8.3 Installing and Removing a Module	61
8.3.1 Installing a Module	62
8.3.2 Removing a Module	63
8.3.3 Verifying the Module is Installed Correctly	63
8.3.4 Removing and Installing a mini-GBIC	64
8.4 Installing and Removing a Power Supply	65
8.4.1 Verifying Power Supply Operation	66
8.5 Installing a ProCurve 9300 Series Chassis in a Rack	67
9 Cisco Catalyst Blade Switch 3020 for HP c-Class BladeSystem	69
9.1 Replacing the Cisco Catalyst Blade Switch 3020	70
10 HP GbE2c Ethernet Blade Switch for c-Class BladeSystem	71
10.1 Replacing the GbE2c Ethernet Blade Switch	71
11 HP 1Gb Ethernet Pass-Thru Module	72
12 Troubleshooting	73
12.1 Basic Ethernet Troubleshooting Tips	73

HP Cluster Platform Interconnects v2010 Gigabit Ethernet Interconnect Guide - Page 73

Troubleshooting, 12.1 Basic Ethernet Troubleshooting Tips, Management and Configuration Guide

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