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Have you examined the optical connectors with a microscope ?<br />
<a href="http://www.thefoa.org/tech/ref/testing/test/scope.html" rel="ugc">http://www.thefoa.org/tech/ref/testing/test/scope.html</a><br />
<a href="https://www.youtube.com/watch?v=MMelSnAqccg" rel="ugc">https://www.youtube.com/watch?v=MMelSnAqccg</a>
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Have you examined the optical connectors with a microscope ?
http://www.thefoa.org/tech/ref/testing/test/scope.html [http://www.thefoa.org/tech/ref/testing/test/scope.html]
https://www.youtube.com/watch?v=MMelSnAqccg [https://www.youtube.com/watch?v=MMelSnAqccg]

Network Engineer

amigan_99

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This was the actual solution that resolved the problem of incremental input and FTC errors
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This was the actual solution that resolved the problem of incremental input and FTC errors

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<div class="content wysiwyg-content">
Env: Cisco Nexus 9508 with an 10Gbase-LR SFP connecting to the carrier. For the last few days the interface has been racking up input errors and CRC. Hundreds ever few seconds. We've replaced the SFP and we replaced the fiber from the SFP to the patch panel. <br />
<br />
What trouble-shooting methods do I have my disposal once the carrier gets on site? I've had these maddening all night affairs where the vendor says &quot;we're all clean to our next device in Deluth (or wherever). Besides replacing optics, shutting/no shutting the interface, what other tools would help to isolate the cause of these errors? Thank you.<br />
<br />
(BTW A tech at the data center tried to throw us a loop but the interface went down from UDLD. If there's a way to make a hard loop to us more informative that would be good to know too)
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Env: Cisco Nexus 9508 with an 10Gbase-LR SFP connecting to the carrier. For the last few days the interface has been racking up input errors and CRC. Hundreds ever few seconds. We've replaced the SFP and we replaced the fiber from the SFP to the patch panel. 

What trouble-shooting methods do I have my disposal once the carrier gets on site? I've had these maddening all night affairs where the vendor says "we're all clean to our next device in Deluth (or wherever). Besides replacing optics, shutting/no shutting the interface, what other tools would help to isolate the cause of these errors? Thank you.

(BTW A tech at the data center tried to throw us a loop but the interface went down from UDLD. If there's a way to make a hard loop to us more informative that would be good to know too)

10Gbps Interface from Carrier is Causing Input errors and CRC errors

Networking software modules are interfaced with a framework implemented on the machine's operating system that implements the networking functionality of the operating system. The best known frameworks are the TCP/IP model and the OSI model. Systems typically do not use a single protocol to handle a transmission. Instead they use a set of cooperating protocols, sometimes called a protocol family or protocol suite.[9] Some of the best known protocol suites include: IPX/SPX, X.25, AX.25, AppleTalk and TCP/IP. Other protocols indirectly related to networking include the hypertext transfer protocol (HTTP) and its related technologies, Dynamic Host Configuration Protocol (DHCP), Domain Name Server (DNS) and other Internet protocols.

Networking Protocols

Cisco PIX is a dedicated hardware firewall appliance; the Cisco Adaptive Security Appliance (ASA) is a firewall and anti-malware security appliance that provides unified threat management and protection the PIX does not. Other Cisco devices and systems include routers, switches, storage networking, wireless and the software and hardware for PIX Firewall Manager (PFM), PIX Device Manager (PDM) and Adaptive Security Device Manager (ASDM).

Cisco

Networking is the process of connecting computing devices, peripherals and terminals together through a system that uses wiring, cabling or radio waves that enable their users to communicate, share information and interact over distances. Often associated are issues regarding operating systems, hardware and equipment, cloud and virtual networking, protocols, architecture, storage and management.