On Tue, 29 Jan 2019 18:17:57 +0100 Vinsonnaud Ludovic <ludovic.vinsonnaud@institutoptique.fr> wrote:

If I connect on the switch, the change is ok in the running-config,
but when I check the startup-config, the change isn't done. I wait a
few minutes and still no change.

It is working well on Cisco 2960 and 3750 (despite sometimes it's slow
if the stack is 8 switch)

Can you help me find where is the problem ?

I can make a very quick assumption:

Dell likely requires an explicit command to store the running-config to
the startup-config. The only other platform we've encountered that
requires this is is Cisco, and since Cisco supports initiating a "write
mem" operation from an SNMP write command, PortAdmin supports it
explicitly.

We have no Dell equipment to test on, but if you can dig up some
documentation on how to issue a similar command using SNMP on a Dell
switch, we should be able to patch NAV.