how to find my mac address from an broken laptop

How to find my mac address from an broken laptop how to#
How to find my mac address from an broken laptop Patch#

Category 3 copper cable can be used for 10 Mbps unshielded twisted pair (UTP) connections but must never be used for 10/100 or 10/100/1000Mbps UTP connections. See the Common Port and Interface Problems section of this document for more information.Įnsure that you have the correct cable for the type of connection you want to make. The show module command can indicate faulty, which can indicate a hardware problem. Use the show interface command for Cisco IOS to look for errdisable, disable or shutdown status. Move the cable to a known good port to troubleshoot a suspect port or module. Verify Hw and Sw support for this type of GBIC.īad Port or Module Port or Interface or Module not enabled Bypass the media convertor if possible to rule it out.īad or wrong Gigabit Interface Convertor (GBIC)

How to find my mac address from an broken laptop Patch#

Bypass the patch panel if possible to rule it out.Įliminate faulty media convertors: fiber-to-copper, and so on. Unplug the cable and reinsert it.Įliminate faulty patch panel connections. Sometimes a cable appears to be seated in the jack but is not. Look for broken or lost pins on connectors.Ĭheck for loose connections. Swap suspect cable with known good cable.

Refer to the Catalyst Switch Cable Guide. Make sure that both ends of the cable are plugged into the correct ports. If the link light for the port does not come on, you can consider these possibilities: Possible CauseĬonnect cable from switch to a known good device. Check the Cable and Both Sides of the Connection Normally you can identify this situation if the port has many packet errors, or the port constantly flaps (loses and regains link). The cable can have encountered physical stress that causes it to be functional at a marginal level.

A single broken wire or one shutdown port can cause the problem where one side has a link light, but the other side does not.Ī link light does not guarantee that the cable is fully functional. The table describes the LED status indicators for Ethernet modules or fixed-configuration switches: PlatformĮnsure that both sides have a link. If you have physical access to the switch, it can save time to look at the port LEDs which give you the link status or can indicate an error condition (if red or orange). Troubleshoot the Physical Layer Use the LEDs to Troubleshoot Note: To access tools and websites, you must be a registered Cisco client. Refer to Cisco Technical Tips Conventionsfor more information on document conventions. If your network is live, ensure that you understand the potential impact of any command. All of the devices used in this document started with a cleared (default) configuration.

The information in this document was created from the devices in a specific lab environment. This document applies to Catalyst switches that run on Cisco IOS® System Software. There are no specific requirements for this document.

How to find my mac address from an broken laptop how to#

This document describes how to determine why a port or interface experiences problems.