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d0d704 Niklas Polke 2026-08-17 15:37:18
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# Rename LAN Connections
233401 Niklas Polke 2026-08-17 15:36:44
Create Rename LAN connections
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## start point
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```bash
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$ ip link
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1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
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link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
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2: end0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000
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link/ether 52:77:18:93:03:d3 brd ff:ff:ff:ff:ff:ff
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altname enx5277189303d3
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3: enp1s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN mode DEFAULT group default qlen 1000
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link/ether 9a:5f:ee:af:de:20 brd ff:ff:ff:ff:ff:ff
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```
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:::warning
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`end0` and `enp1s0` are not good for human readability
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:::
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## search for hardware paths (ID_PATH)
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```bash
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$ udevadm info /sys/class/net/end0 | grep -E 'ID_NET|ID_PATH'
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E: ID_NET_DRIVER=st_gmac
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E: ID_NET_NAMING_SCHEME=v257
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E: ID_NET_NAME_MAC=enx5277189303d3
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E: ID_NET_NAME_ONBOARD=end0
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E: ID_PATH=platform-fe010000.ethernet <---
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E: ID_PATH_TAG=platform-fe010000_ethernet
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E: ID_NET_LINK_FILE=/usr/lib/systemd/network/99-default.link
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E: ID_NET_NAME=end0
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$ udevadm info /sys/class/net/enp1s0 | grep -E 'ID_NET|ID_PATH'
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E: ID_NET_DRIVER=r8169
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E: ID_NET_NAMING_SCHEME=v257
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E: ID_NET_NAME_PATH=enp1s0
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E: ID_PATH=platform-3c0000000.pcie-pci-0000:01:00.0 <---
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E: ID_PATH_TAG=platform-3c0000000_pcie-pci-0000_01_00_0
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E: ID_NET_LINK_FILE=/usr/lib/systemd/network/99-default.link
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E: ID_NET_NAME=enp1s0
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```
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## create links
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### wan / end0 port
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```bash
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sudo nano /etc/systemd/network/10-wan0.link
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```
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```
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[Match]
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Path=platform-fe010000.ethernet
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[Link]
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Name=wan0
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```
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### lan / enp1s0 port
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```bash
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sudo nano /etc/systemd/network/11-lan0.link
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```
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```
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[Match]
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Path=platform-3c0000000.pcie-pci-0000:01:00.0
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[Link]
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Name=lan0
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```
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### change /etc/netplan/30-ethernets-dhcp.yaml
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- rename `end0` to `wan0` and `enp1s0` to `lan0`
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## test links
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```bash
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sudo udevadm test-builtin net_setup_link /sys/class/net/end0 2>&1 | grep -E 'Config file|ID_NET_NAME'
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sudo udevadm test-builtin net_setup_link /sys/class/net/enp1s0 2>&1 | grep -E 'Config file|ID_NET_NAME'
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```
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## reboot
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```bash
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sudo reboot
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```
b6b97d Niklas Polke 2026-08-17 15:39:08
Add final test
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## test new names
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```bash
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ip -br link
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```