#TIL One could change the mac address of the lo interface, but one cannot revert it to 00:00:00:00:00:00. When the kernel boots or a netns is created, the lo interface spawns with the initial mac address 00:00:00:00:00:00. It can be changed afterwards, but it seems to be impossible to change it back to it's initial value 00:00:00:00:00:00. Fascinating. 🤷

#linuxnetworking

ifstate 2.3.0 - a tool for declarative network configuration for Linux - was released:
https://codeberg.org/routerkit/ifstate/releases/tag/2.3.0

This is release contains various new features like:
- bridge: VLAN membership for bridge ports
- link: support external created veth ifaces
- routing: ignore routes by ifname regex
- tc: add vlan action (allows remapping); improve change detection

The new release is already available in #AlpineLinux and in the RouterKit Debian package repository.

#linuxnetworking #ifstate #RouterKit

ifstate 2.2.6 - a tool for declarative network configuration for Linux - was released:
https://codeberg.org/routerkit/ifstate/releases/tag/2.2.6

This is a bug-fix only release:
- fix MTU configuration for newly created tun links
- fix exception if wireguard sockets cannot be opened (i.e. due to missing kernel modules)

The new release is already available in #AlpineLinux and in the RouterKit Debian package repository.

#linuxnetworking #ifstate #RouterKit

Building Ubuntu LTS packages for #ifstate has been enabled in git HEAD. There are pre-release builds available for Ubuntu noble and jammy.

https://codeberg.org/routerkit/-/packages/debian/ifstate/2.3.0~pre2-1

Please be aware that the next (pre-)release packages will get a conflicts to netplan.

/cc @bebehei

#ifstate #linuxnetworking

ifstate 2.2.5 - a tool for declarative network configuration for Linux - was released:
https://codeberg.org/routerkit/ifstate/releases/tag/2.2.5

The 76th release includes various fixes & improvements like:
- fixing address scope handling
- fixing non-wireless interfaces handled as wireless interfaces when moving them between netns
- make parsing route table files more compatible to iproute2

I am very grateful for the growing number of contributors. 🙏

#linuxnetworking #ifstate #RouterKit

Okay, this is weird.

I am seeing `tailscaled` spiking up to 250% CPU usage every other minute, with up to 60 MBit/s outgoing traffic on the `tailscale0` interface... and on the `wg0` interface I see the same amount of traffic during that period.

I now disabled wireguard and the issue is gone.

But I have absolutely NO idea why this is happening, what causes it, and why it (seemingly) suddenly started - I did not have this issue earlier today. All I did in between was update the unstable channel, but all packages involved here (tailscale, wireguard) are from stable. So... 🤔 I am at loss...

#tailscale #wireguard #linux #linuxnetworking #networking #sysadmin #nixos

Unser @dd_ix Workshop zum Thema BGP Routing wurde auf den @clt_news angenommen 💪 . Für alle die meine Vorträge der letzten Jahre über Alpine Linux, ifstate oder Linux Router interessant fanden bietet sich hier die Möglichkeit für praktische Erfahrungen und Austausch.

https://chemnitzer.linux-tage.de/2026/de/programm/beitrag/329

#CLT2026 #DDIX #ifstate #RouterKit #linuxnetworking

ifstate 2.2.4 - a tool for declarative network configuration for Linux - was released:
https://codeberg.org/liske/ifstate/releases/tag/2.2.4

The 75th release includes various fixes & improvements like:
- make stable-privacy IPv6 addresses work
- resolve wireguard endpoints *after* configuring the network stack so that DNS resolution could work

This is the first release with published Debian packages: https://ifstate.net/2.2/docs/install/#debian-gnulinux

#linuxnetworking #Debian #ifstate #wireguard