!tCyGickeVqkHsYjWnh:nixos.org

NixOS Networking

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Declaratively manage your switching, routing, wireless, tunneling and more. | Don't rely on `networking.*` for interface and routing setup, use systemd-networkd, ifstate or NetworkManager instead. | Set `SYSTEMD_LOG_LEVEL=debug` to debug networking issues with networkd | No bad nft puns, please. | Room recommendations: #sysops:nixos.org255 Servers

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10 Feb 2026
@nazarewk:matrix.orgkdndoh, increasing MTU on the router to 1504 didn't help13:53:24
@nazarewk:matrix.orgkdnpinging another device plugged in directly to Mikrotik works fine with whatever MTU, so if I'm correct it must be some issue with the router?14:03:58
@nazarewk:matrix.orgkdnyeah, wired 1469 to the router doesn't work either14:05:02
@nazarewk:matrix.orgkdn and ipv6 ping stops working at 1449 (20 more bytes), I guess I should move the discussion to #OpenWrt:matrix.org 14:11:18
@nazarewk:matrix.orgkdnthat's curious, I removed some customized configs for devices/links (no idea what I put there, definitely nothing needed), that made me lose internet completely until I rebooted the OpenWRT, now it's functioning correctly all around 14:40:16
@nazarewk:matrix.orgkdn* that's curious, I removed some customized configs for devices/links (no idea what I put there, definitely nothing needed), that made me lose internet completely until I rebooted the OpenWRT, now it's functioning correctly all around without any custom MTU14:40:25
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12 Feb 2026
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13 Feb 2026
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15 Feb 2026
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@tom:dragar.deTomRedacted or Malformed Event17:54:42
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@tom:dragar.deTomI just checked when there could be a NixOS Release with the NetworkManager CLAT Support. It isn't (already) included with 1.56.0 from 3 days ago. So it'll probably be 1.58.0 which looks like it could happen August/September. So at the earliest it'll be NixOS 26.11. I guess i'll have to check how much of a problem it would be to override it locally. At least temporarily to satisfy my desire to play with it. 😅18:06:12
@nico:c3d2.deNicoWait what, network manager has clat support now?19:23:55
@nico:c3d2.deNicoJust found this, if I have the time, I will definitely test this... https://gist.github.com/alexhaydock/3a458b36ce79851f4576794e5f18e1d5 I even have a test prepared 😂 https://github.com/secshellnet/nixos-tests/pull/319:25:27
@tom:dragar.deTomah, nice find that gist19:37:16

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