FYI, to further confirm this is likely an issue that only occurs with passive DAC cables, I tested with an Active Optical Cable from SFP+/WAN3 on the ER8411 and it establishes connectivity to the SFP...

BitSlinger wrote @Clive_A These cables don't work on the ER8411 SFP port 3 now after 1.3.2 (I did not test 1.3.1): QSPFTEK - QT-SFP+-CA-P2M 10GTEK - CAB-10GSFP-P3M The above cables work on the ER8411...

I have a work-around by using an RJ45 ethernet transceiver, but I wouldn't call it a fix. I've tested with multiple passive DAC cables, and I can't establish connectivity between ER8411 v1 (SFP...

Update - I had a chance to borrow a 10GTek 1000Base-T SFP RJ45 transceiver and when used with the ER8411's SFP LAN/WAN3 port it works just fine. So far, in all my testing, the SFP LAN/WAN3 port only...

I've also got an ER8411 v1 which was connected to an SG2428P via SFP WAN/LAN3 on the ER8411. Like others, the connection failed after the 1.3.1 firmware update. This week's 1.3.2 firmware didn't...