With my Arris, when I switch to open mode, I have to reset the modem several times and only after some (often the third / fourth time) it fires with the network name ARRIS-XXXX. Then the login details on the modem work. In general, the topic of open mode is interesting, because Vectra has been defending itself for a long time against giving access to modems to its clients. Unfortunately, in my case, the modem restarts itself every now and then, thus forgetting, for example, fixed IP addresses. You can see that they are still struggling with the topic and their approach is changing. In my opinion, it is worth playing with it from time to time to check how it works at the moment, but, for example, I like to return to the bridge mode and my own router, which gives me the certainty that suddenly the WiFi network will not disappear, because the modem must release reboot yourself.
