Hey! > > > No, the DHCP server is running in the modem, to ease the configuration > > process on the host side. Qualcomm modems have it for sure, there are > > several other manufacturers that don't. > > There is no DHCP protocol used in between the modem and the network, > > IP assignment is done via 3GPP protocols. > > Ah thanks, that clarifies some unrelated matters for me. > > >> Anyway, it's certainly true that DHCP > >> is not always provided. But also, with a static IP assignment as it is > >> done > >> in OpenWrt, there's no mechanism if the IP changes - this can happen due to > >> expiry of the IP, changing stations (i.e, a moving devicde) or other > >> upstream > >> network churn. In such cases, you continue to be connected to the > >> network, but > >> lose IP connectivity unless you have another mechanism to watch for such > >> changes. > > > > If I'm not mistaken, a network-initiated disconnection is reported in > > such cases (which openwrt git master branch supports), and the modem > > just needs to re-establish the bearer with a reconnection. If this is > > not always the case, we should definitely trigger a disconnection of > > the modem ourselves upon detecting the IP reconfiguration. I'll ask > > around to see what modems usually do in this regard. > > When was this introduced?
Commit bc754f31cfdb004eefa43038f8f0827922107fc6 in openwrt-packages, I think it's only in master for now. -- Aleksander