1. I'm not 100% sure but I think the SFP+ port is 10G only on this model. So be sure to use the 1G only port. On the CCR1072 I know it's 10G or 1G but you have to put auto-negotiation to off and set the rate to 1G manually to get 1G on a 10G port. Otherwise you will see light and link but the other side see's nothing. For a 1G port, use auto negotiation.

2. the web interface returns wrong values for rxpower in RouterOS 6.33 as they changed some API to it but didn't update the Web GUI for it. The command line value is ok however. Its fixed in current 6.34 release candidate. In my case I got like 4 billion watts of light power indicated which would convert my tiny little router in an atomic reactor in the size of our sun if it would be correct.

3. Your system says no-link which sounds to me like no incoming light. Are you sure the patch cable is of correct type and orientation? try swapping RX/TX

On 17 Nov 2015, at 13:20, Andre Timmermann <andre.timmermann@darkt.im> wrote:

Hello,

I recently bought a Mikrotik CR1009-8G-1S-1S+. I added a Mikrotik S
-31DLC20D SFP module to connect my internet uplink.
The uplink provider confirmed that the uplink should be working with
wavelength 1310 nm, single mode, 1GBit, no auto negotiation.

Unfortunately the webinterface shows "no link". Firmware is 6.33 and I
rebooted the device - still no link.

Please note that I do NOT get a value for sfp-rx-power in the
webinterface or the following dump. Is that a hint that the fiber is
not OK or is that conclusion invalid?

/interface ethernet monitor 9
name: sfp1
status: no-link
auto-negotiation: disabled
sfp-module-present: yes
sfp-rx-lose: yes
sfp-tx-fault: no
sfp-type: SFP-or-SFP+
sfp-connector-type: LC
sfp-link-length-9um: 20000m
sfp-link-length-50um: 550m
sfp-link-length-62um: 550m
sfp-vendor-name: Mikrotik
sfp-vendor-part-number: S-31DLC20D
sfp-vendor-revision: A0
sfp-vendor-serial: MT50617H2074
sfp-manufacturing-date: 15-06-24
sfp-wavelength: 1310nm
sfp-temperature: 50C
sfp-supply-voltage: 3.237V
sfp-tx-bias-current: 21mA
sfp-tx-power: -7.055dBm

/interface ethernet> monitor 9
name: sfp1
status: link-ok
auto-negotiation: done
rate: 1Gbps
full-duplex: yes
tx-flow-control: no
rx-flow-control: no
advertising:
link-partner-advertising:
sfp-module-present: yes
sfp-rx-lose: no
sfp-tx-fault: no
sfp-type: SFP-or-SFP+
sfp-connector-type: copper-pigtail
sfp-link-length-copper: 3m
sfp-vendor-name: Molex Inc.
sfp-vendor-part-number: 74743-0021
sfp-vendor-revision: A
sfp-vendor-serial: 131330080
sfp-manufacturing-date: 10-11-09