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Title: Automatic switch wifi/ethernet on OpenBSD |
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Author: Solène |
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Date: 30 August 2018 |
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Tags: openbsd70 openbsd networking highlight |
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Description: |
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Today I will cover a specific topic on OpenBSD networking. If you are |
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using a |
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laptop, you may switch from ethernet to wireless network from time to |
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time. |
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There is a simple way to keep the network instead of having to |
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disconnect / |
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reconnect everytime. |
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It's possible to aggregate your wireless and ethernet devices into one |
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trunk |
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pseudo device in failover mode, which give ethernet the priority if |
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connected. |
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To achieve this, it's quite simple. If you have devices **em0** and |
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**iwm0** |
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create the following files. |
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**/etc/hostname.em0** |
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up |
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**/etc/hostname.iwm0** |
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join "office_network" wpakey "mypassword" |
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join "my_home_network" wpakey "9charshere" |
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join "roaming phone" wpakey "something" |
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join "Public Wifi" |
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up |
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**/etc/hostname.trunk0** |
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trunkproto failover trunkport em0 trunkport iwm0 |
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autoconf |
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As you can see in the wireless device configuration we can specify |
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multiples |
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network to join, it is a new feature that will be available from 6.4 |
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release. |
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You can enable the new configuration by running `sh /etc/netstart` as |
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root. |
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This setup is explained in [trunk(4)](http://man.openbsd.org/trunk.4) |
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man page and in the |
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[OpenBSD FAQ](https://www.openbsd.org/faq/faq6.html#Wireless) as well. |
