GS108Ev3 refuses to connect

Fanagolo wrote:

I've seen some threads about MTU length required to be 1500 and it is. I tried changing that - it didn't work so I changed it back and it still didn't work!

Double check - from PowerShell run:

netsh interface ipv4 show subinterfaces

Example:

PS C:\Users\kurts> netsh interface ipv4 show subinterfaces

MTU MediaSenseState Bytes In Bytes Out Interface

---------- --------------- ------------ ------------ -------------

4294967295 1 0 14450590 Loopback Pseudo-Interface 1

1500 1 891408824 94922849 WiFi

1500 2 190977316 74523312 Ethernet

1500 5 0 0 Ethernet 2

1500 5 0 0 Local Area Connection* 1

1500 5 0 0 Local Area Connection* 2

1500 5 0 0 Bluetooth Network Connection

The reson for this behaviour: This simple IP stack does not support any PMTUD (Path MTU Discovery) .

Fanagolo wrote:

When I try the ProSafe Discovery Tool and ProSafe Plus Utility v2.7.8, they also discover the switches but report that the admin feature is disabled on the switches.

Indeed: Following a factory reset, NSDP Configuration functions are disabled by default for security reasons.

This applies to the legacy tools only, because they are using the NSDP (Netgear Switch Discovery Protocol). 

And: The current NDT (Netgear Discovery Tool) might discover switches like your GS108Ev3 (and earlier), or GS308E (very similar to your GS108Ev3) - due to lack of ressources (DRAM, Flash, ...) the modern UPnP SSDP can't be implemented on these very small switches, only by using NSDP.