![]() ![]() ![]() 0.1 dev enp4s0f0 proto static metric 100ĭefault dev wwp0s21u1i8 scope link metric 300ĭefault dev wwp0s21u4i8 scope link metric 500ġ0.66. This is a result of the management-vector configuration defined above.Īfter committing this configuration and shutting down 128T, the linux route table will look like:ĭefault via 172.17. When this handover happens, a default-route is added to each interface in linux with an associated metric taken from the management_vector priority. When the 128T is not running, both LTE interfaces will be returned to linux. Both have default-route enabled the AT&T interface has a metric of 300 and the Verizon interface has a metric of 500. ![]() The first module has an AT&T SIM and the second one has a Verizon SIM. management-vector contains the following two fields:īelow is an example configuration with two LTE modules.default-route: enable/disable default-route via LTE interface in linux.Use the following configuration fields under network-interface to configure this feature: This corresponds to QMI interface wwp0s21u3i8. sys/bus/usb/drivers/qmi_wwan/2-1:1.8/net/:wwp0s21u1i8įrom the output of lsusb above, the Sierra Wireless adapter (2nd LTE card), we can tell is connected to Bus 001 Device 003. ![]() # ls /sys/bus/usb/drivers/qmi_wwan/*/net/ At the linux shell, execute the command lsusb to output the list of connected USB devices. Verify the existence of the second LTE module by scanning the USB bus. In order to identify the LTE module we need to know on what bus and device it is connected within Linux. When running with two LTE cards, it is required that the second module be connected via USB interface over MiniPCIe, M.2 or even USB dongle. When running with a single LTE module, there are no restrictions on how the adapter is connected within the hardware platform. Of the many LTE modules on the market, 128 Technology has standardized on those modules that utilize QMI (Qualcomm MSM Interface Protocol). This is commonly used in remote ATMs or kiosks as a replacement for 56K DSL lines. LTE connectivity is a valuable means of providing an alternate path for multi-path routing either as a primary path in locations that have no access to circuits or as a path of last resort in the event that the primary circuit has failed.ĭual LTE support is valuable when connecting to two discrete wireless carriers where there is a need for an active/active LTE connection. LTE and Dual LTE Configuration History Release ![]()
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