Had some issues with connecting my RB4011iGS+ and 260GS/260GSP switches via SFP direct attach cable so want to share experience for others who can have the same. :)
1) I was not very attentive when reading this https://wiki.mikrotik.com/wiki/MikroTik ... lity_table from smartphone and missed that S+DA0001 (https://mikrotik.com/product/SplusDA0001, already discontinued, but still sold a lot) is not compatible with 4011. So I bough it and have to return after it failed to work.
2) Newer version XS+DA0001 (https://mikrotik.com/product/xs_da0001) is compatible with both 4011 and 260. And is still rather cheap variant to connect those two.
3) You have to manually set 4011 SFP+ port to 1G speed as described here https://wiki.mikrotik.com/wiki/MikroTik ... ansceivers
It won't work with autonegotiation.
4) On 260GS/260GSP side it works automatically without any hassle.