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{"@context":"https://schema.org","@type":"QAPage","mainEntity":{"@type":"Question","name":"Adding a macvlan interface","text":"
I'm trying to do the equivalent of nmcli connection add ifname test type macvlan dev eth0 mode vepa
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It appears I want to use NetworkManager().add_and_activate(), but then what is the specific_object argument? Is it the Device, and  I have to create the Device separately from the Connection? It's supposedly a str, but it's not the path to the device (which gives me src/sdbus/sd_bus_internals_message.c Line: 217. sd_bus_message_append_basic(parser_state->message, basic_type, char_ptr_to_append) in function _parse_basic returned error number: 22)
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Incidentally, if you omit specific_object, you get the unhelpful TypeError: Could not flatten the args rather than anything indicating a missing argument.
","upvoteCount":1,"answerCount":3,"acceptedAnswer":{"@type":"Answer","text":"
Hello @auspex
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What exactly are you trying to call  add_and_activate_connection with? It is probably not a correct type.
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See examples that add new connections like add-openvpn-connection-async.py. The important part is connection_type=ConnectionType.VPN.value that you want to swap to macvlan and vpn=VpnSettings that you want to swap for macvlan=MacvlanSettings(....
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I highly recommend running the type checker like mypy as it will tell you when you call something with wrong types.
","upvoteCount":1,"url":"https://github.com/python-sdbus/python-sdbus-networkmanager/discussions/71#discussioncomment-12859978"}}}