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Hi, try this, it worked for me, in short you need to enable HTTPS mgmt access and assign TACACS or RADIUS authorization protocol to it:in GUI:1. go to Security menu2. navigate down to Management Access Authentication3. on the top of the right portion...
Had this problem too, when connecting 3750X to 6506E via 10G links.Solved it by downgrading to stable IOS on 3750X (from 15.2(2)E to 15.0.2 SE8).Problem is on TX side, not on RX side; SFP is instructed by IOS to transmit on very low power, it is not ...
