Is that the 1072? I believe those will only support 1G/10G. They say it "supports" the S-RJ01 and similar which is 10/100/1000. You should probably try forcing the advertisement to 1000 full only. Or replace the SFP to rule it out.

On 6/28/2017 11:29 AM, Steve Jones wrote:
we put in a CCR Saturday, we are using the copper SFP. Twice since then weve had to reseat the module. It shows as present in the winbox. but no connection. even a reboot of the CCR does not bring it back up, it has to be pulled and reseated. is this a known issue or should I contact mikrotik support (do they have support?)

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