Thanks for the explanation @KJK I'll just drop this subject and accept the situation as it is

Thank you @Clive_A I think we are still having a bit of trouble understanding eachother, NAS is uplinked to SG2008P via 2x1gbit in L2/L3 LAG, all 5 clients are connected to the same SG2008P, 3 wired...

Thanks @Clive_A , indeed @KJK 's replies were very informative but it only makes me think that there is some bug in the LACP layer 3 algorithm, (SRC IP + DST IP/ DST IP / SRC IP) in both outlined...

@MauriceGee Try updating manually? mine is managed by OC200 and has the latest firmware...

Updating since my switch got CLI support this week finally, i have set lacp system-priority 100, but no luck. after that i have changed the ports which are connected to the NAS, updated the LAG...

@crembz I'm not sure about the fixed part, normally I only use Cisco GLC-SX-MM with those switches, but even FS SFP-10G-LR & SFP-10G-SR (Cisco compatible models) have failed to auto-negotiate the...