Has anyone here ever had to do this combination or some sort of Mikrotik to 3750X with 10 GIG. I had an event that about a year ago that just completely crumbed and I remember that I saw the CRCs on the Cisco switch I was using at the time (2960S with 10Gig, and at the time CRS317-1G-16S+) and I remember switching cables and the issue remained. Now im at another event using a 3750X and the CRS326-24S+RM and when I check the FCS errors on the Mikrotik They were all over the place. Is there something I should consider whenever making this negotiation? At this current event what ive done already is change from a DAC cable to a brand new patch cord along with two new SFP+'s
Basically, it's an L1 issue cable and a physical port.
Some times negotiation between the two device ( you should have to use manual config port on the both devices) bad port 3750 Bad cable Bad frames sent by the device on the other side. NIC card incompatibility between microtek and the Cisco switch SFP incompatibility may case also for CRC error.