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I'm sure this is in place - hopefully - but the offsite NetAdmin does all of this. This will prevent this sort of "incident" from happening again (especially should a user wind up creating a loop themselves by plugging the two ends of an Ethernet cable into two separate wall jacks or something similarly ludicrous). It was mentioned already in the thread, but, if it's available, definitely enable STP (Spanning Tree Protocol) on your switches. There's also little need for Crossover cables too, but that's another story. That said, there's no use for a Loopback in LAN networking. LOOPBACK PLUG TO TEST AN ETHERNET PORT SERIALLoopback was used for serial connections (T-1s and such)īasically let the guy at CO see a closed circuit. I guess the days of old phone technologies are gone, which is too bad in some ways but that is a story for another day! ![]() Now most of the equipment can diagnose itself or would never support a loopback connection. Before our current phone technologies these were common ways of troubleshooting. There's also little need for Crossover cables too, but that's another story.Telco equipment is really the only use of Loopback equipment and even that is pretty limited now. LOOPBACK PLUG TO TEST AN ETHERNET PORT SOFTWAREGenerally with equipment where there is no software loopback available. Once upon a time, it was a common tool, but now we have better tools. I have used them successfully to test a NIC.īut I would never plug one into a switch. I was surprised that Loopback plugs were still listed as a network/PC troubleshooting tool in the documentation, but very little real guidance on when to use them, why you use them, and what to look for.įor example, they used to be real useful for testing serial ports. Thanks!īecause it has been 15 years since I last did my A Technician (I was grandfathered, it didn't expire), I recently decided to re do it. You said : " A loop back typically will have a very low metric so the entire network will be sent through that link because it is reported as the fastest." That is a very helpful explanation. I did notice that the POST light on the affected switch is now amber after the power-cycle and I was reading that about disabling the port so probably once I disconnect the switch I plugged the loopback into and do another power cycle the POST will be green again. ![]() Thankfully there was no lasting effect and all was resolved quickly. Disconnecting the loopback and probably rebooting the switch should return your network to normal. A loop back typically will have a very low metric so the entire network will be sent through that link because it is reported as the fastest. I have seen some shoddy switches not disable the port. ![]() You did create a loop back which if the switch handled it correctly it should have disabled the port if Spanning Tree was enabled. I would suggest you to refer the (Page No.2092) for more information on "Ethernet Media Access Controller (EMAC)" in ADSP-SC58x Hardware Reference Manual.First of all don't do this on a production network!! It will slow it to a snail's pace.ĭid you do any permanent damage, No. This example does not contain a test for the 10/100/1000 Ethernet port. Unlike the other loopback cables, this connector must loopback from transmit to receive on the same 10/100 Ethernet port. Note:-Plug Ethernet loopback connectors into the 10/100 and 10/100/1000 Ethernet ports. LOOPBACK PLUG TO TEST AN ETHERNET PORT CODEPlease download the Board Support Package for ADSP-SC58x from the below link ,ĭ/tools/EZBoards/21489/Releases/Release_1.0.0/ADI_ADSP-21489_EZKIT-Rel1.0.0.exeįind the exapmle code from the below path,Ĭ:\Analog Devices\ADSP-SC58x_EZ-KIT_Lite-Rel1.0.0\ADSP-SC58x_EZ-KIT\Examples\Power_On_Self_Test\common\source However, you can find the example code that can be refer to test the Ethernet in ADSP-SC584 EZ-kit. ![]() Sorry for the long delay in getting back to you.Ĭan you please explain what exactly do you mean by " key configuration and data interface over ethernet 10/100.". ![]()
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