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Announcements

Cisco announces new innovations in SD-WAN, ISRs, SD-WAN Services, and Catalyst 9000 Series switches


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remote 10/100G ethernet loopback testing

Hi - im struggling to grasp he concept of loop testing done remotely. I've heard of the terms terminal facing and facility facing but cannot picture what this loops? Can anyone describe loop testing done remotely with an example topology below with an alarm for fiber break/shutdown? any help really appreciated - idiots terms please!

 

Client device              DWDM device A                                           DWDM device Z                                   Client device

100G interface------client i/f 100G-----line i/f OTU4----------line i/f OTU4-----client i/f 100G--------100G i/f

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