operations with Ethernet header in case of "802-3" mode

[Martin Tõnusoo]

Hi.

I have a LTE modem with Qualcomm MDM9x25 chipset. It supports both the
"raw-ip"(qmicli -d /dev/cdc-wdm0 --wda-set-data-format=raw-ip) and
"802-3"(qmicli -d /dev/cdc-wdm0 --wda-set-data-format=802-3) modes.

1) Am I correct, that in case of "802-3" mode, the LTE modem pops the
Ethernet header for egress traffic from host and pushes the Ethernet header
for ingress traffic?

2) The Ethernet device created by qmi_wwan driver has a MAC address with
U/L bit set. Where does this address come from? Is this generated by the
LTE modem firmware and passed to qmi_wwan driver?


thanks,
Martin
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