29 lines
2 KiB
Markdown
29 lines
2 KiB
Markdown
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date = "2017-02-16T19:38:42-07:00"
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title = "Quick nmcli notes"
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categories = ["unix","sa"]
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tags = ["linux","R810"]
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This is a quick post so I can remember these details.
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So, on the [R810](/tags/r810/), I am currently running [ArchLinux](https://archlinux.org), which uses by default [NetworkManager](https://wiki.archlinux.org/index.php/NetworkManager), which I have a love/hate relationship with. At my last job, I recommended removing it from our servers, as under [RHEL6](https://www.redhat.com), it does very odd things to the network and is hard to manage. I have heard that it is better under RHEL7. But, it does let you do some really cool things. On the R810, there is a cellular modem, and on previous installes, I have had it configured and scripted using **nmcli** to easily bring up and down the cellular connections.
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The problem I am facing now is that my current DHCP server for the house does not let me provide two MAC Address for a single IP, so when I dock the R810, it gets a different IP address than when it is on WiFi. Very annoying. Also, for some reason, it would prefer to use WiFi when the ethernet connection was present, thus giving me a slower connection.
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The documentation I found was a bit light in examples and/or dated (I am running version 1.6.2 of NetworkManager, and the examples were from 1.2.x or 1.4.x, which did not work). So, with a bit of expermenting, I finally got it fixed to:
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- Chose the ethernet connection over the Wifi when both are present
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- 'Clone' the MAC address of the Wifi NIC to the ethernet NIC
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Here are the commands. **local** is what I called the local ethernet connection, and **home-wifi** is what I call the house Wifi Network.
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- To set the MAC adress:
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>nmcli connection modify local ethernet.cloned-mac-address aa:bb:cc:dd:ee:ff
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- To set the connection priorities:
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>nmcli connection modify local connection.autoconnect-priority 999
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>nmcli connection modify home-wifi connection.autoconnect-priority 999
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