I started having connectivity issues between my core 4506E (Sup7E) and Cisco 2960S. There were input and CRC errors on Te int (SFP 10Gb - LRM) on 2960S, which cause the interface to reset and drop connections. While troubleshooting this issue, I have replaced patch cords and also had the tech checking the fiber. He said that there was some residue on one of the connectors, so the light levels fluctuated in 1300nm, but worked fine in 850. Well LRMs are using 1300, so he re-polished the tips, which helped to stabilize the light levels. After all that, I was still receiving the input/CRC errors, but the connection was NOT dropping. As my last resort I swapped the SFPs between the core and 2960, thinking I should start having issues on the core end. Well, here's what happened: I stopped receiving input/CRC errors on 2960 (also no errors on the core), but 2960s started generating Rx power high alarms:
%SFF8472-5-THRESHOLD_VIOLATION: Te1/0/2: Rx power high alarm; Operating value: 0.4 dBm, Threshold value: 0.0 dBm.
I'm not sure how to handle that one...how can I fix this? Any suggestions would be really helpful.
We are pleased to announce availability of Beta software for 16.6.3.
16.6.3 will be the second rebuild on the 16.6 release train targeted
towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are
looking for early feedback from customers befor...
Introduction Featured Speakers Luis Espejel is the Telecommunications
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