Also thank you for your answer. After I "assembling" the two trunk ports does my Synology NAS continue "IEEE 802.3ad link could not be established."

Thank you for your prompt reply. "Put the parts you want to aggregate to the group and then connect the ports" - that's my problem - Where? KR Hi-Fey

Model : Hardware Version : Not Clear Firmware Version : TL-SG105E_V1_141016 ISP : Hi Community, first of all - sorry for my bad english. Since weeks, I try to configure my Switch with Link...