Re: [Mbm-devel] Modem-/NetworkManager support for modems not using PPP
2011/4/19 Marius Kotsbak : > > Strange since it probably affect the communication out of the modem to the > network operator, but they might support both PPP and ethernet/DHCP in the > other end. > No. You have to think about your modem as a separate piece of equipment, even if it's integrated. The PPP session is established between your laptop OS and the modem. Or the modem can send DHCP offers to your laptop OS. Your laptop OS will never talk directly to the ISP. The data session over mobile network is something different that is done by the modem and you're not aware of. So in fact it makes no difference if you use PPP or DHCP, except that using PPP you use a serial emulation over USB, whereas when you use DHCP it's an ethernet emulation over USB, and the speed of the serial emulation can be a problem to reach the max bw offered by the mobile net, that's one of the reasons why it's recommended to use ethernet emulation. Guillaume ___ networkmanager-list mailing list networkmanager-list@gnome.org http://mail.gnome.org/mailman/listinfo/networkmanager-list
Re: [Mbm-devel] Modem-/NetworkManager support for modems not using PPP
Den 18. april 2011 09:24, skrev Torgny Johansson: Hi Marius! On Sat, Apr 16, 2011 at 2:57 PM, Marius Kotsbak wrote: Hi! There seems to be now quite a bit of modems appearing now that does not support the old method of using PPP protocol on the same tty device as the AT commands are sent, or it is not recommended for higher HSPA+ and LTE modems because of performance limitations of the PPP/tty layer. Those devices typically accept AT commands at one interface and use another interface for the network traffic (including first a DHCP query). One example is the Samsung GT-B3730 I'm currently developing drivers for: https://github.com/mkotsbak/Samsung-GT-B3730-linux-driver It seems to be the same case for LG VL600 4G (LTE): http://ubuntuforums.org/showpost.php?p=10589647&postcount=17 https://github.com/balrog-kun/LG-VL600-utils The Ericsson Mobile Broadband Modules (I have an F5521gw based modem) seems to offer both the old ACM ports and support USB WCM / CDC NCM / CDC Ethernet protocols for higher performance: http://www.thinkwiki.org/wiki/Ericsson_F3507g_Mobile_Broadband_Module#Connecting_to_the_net_via_CDC_Ethernet_interface http://sourceforge.net/apps/mediawiki/mbm/index.php?title=MBM#Prerequisites http://cateee.net/lkddb/web-lkddb/USB_NET_CDC_NCM.html I wonder if support for this has been implemented or thought about in Modem-/NetworkManager. We probably need a flag for a modem manager module to tell that it does not use PPP and require to get IP address using DHCP instead. Yes, support for using the cdc_ncm interface in ModemManger is already available. The same goes for the older ericsson modules using the cdc_ether interface. No need for PPP anymore. Ah ok. Will look at that module and see if I can make a similar module for my LTE modem. When I looked at the NM code it seemed it always do PPP. Strange since it probably affect the communication out of the modem to the network operator, but they might support both PPP and ethernet/DHCP in the other end. -- Marius ___ networkmanager-list mailing list networkmanager-list@gnome.org http://mail.gnome.org/mailman/listinfo/networkmanager-list
Re: [Mbm-devel] Modem-/NetworkManager support for modems not using PPP
Hi Marius! On Sat, Apr 16, 2011 at 2:57 PM, Marius Kotsbak wrote: > Hi! > > There seems to be now quite a bit of modems appearing now that does not > support the old method of using PPP protocol on the same tty device as > the AT commands are sent, or it is not recommended for higher HSPA+ and > LTE modems because of performance limitations of the PPP/tty layer. > Those devices typically accept AT commands at one interface and use > another interface for the network traffic (including first a DHCP query). > > One example is the Samsung GT-B3730 I'm currently developing drivers for: > > https://github.com/mkotsbak/Samsung-GT-B3730-linux-driver > > It seems to be the same case for LG VL600 4G (LTE): > > http://ubuntuforums.org/showpost.php?p=10589647&postcount=17 > > https://github.com/balrog-kun/LG-VL600-utils > > The Ericsson Mobile Broadband Modules (I have an F5521gw based modem) > seems to offer both the old ACM ports and support USB WCM / CDC NCM / > CDC Ethernet protocols for higher performance: > > http://www.thinkwiki.org/wiki/Ericsson_F3507g_Mobile_Broadband_Module#Connecting_to_the_net_via_CDC_Ethernet_interface > > http://sourceforge.net/apps/mediawiki/mbm/index.php?title=MBM#Prerequisites > > http://cateee.net/lkddb/web-lkddb/USB_NET_CDC_NCM.html > > I wonder if support for this has been implemented or thought about in > Modem-/NetworkManager. We probably need a flag for a modem manager > module to tell that it does not use PPP and require to get IP address > using DHCP instead. Yes, support for using the cdc_ncm interface in ModemManger is already available. The same goes for the older ericsson modules using the cdc_ether interface. No need for PPP anymore. You may have to add your vid/pid to the /lib/udev/rules.d/77-mm-ericsson-mbm.rules (.../plugins/77-mm-ericsson-mbm.rules if you have the MM sources checked out) file to get ModemManager to recognize it (then run "sudo udevadm control --reload-rules" and restart modemmanager). Regards Torgny ___ networkmanager-list mailing list networkmanager-list@gnome.org http://mail.gnome.org/mailman/listinfo/networkmanager-list
