armbian-config: Disable IPv6 not work (after reboot)

[silverwolf42]

Device Information | 设备信息

• SOC: s905d
• Model: N1

Armbian Version | 系统版本

• Kernel Version: Linux 6.1.36-ophub
• Release: Armbian 23.08.0-trunk bookworm

Describe the bug | 问题描述 使用 armbian-config 关闭了 IPv6，重启 之后网卡接口仍然出现了 inet6

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever

  .......

4: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether xx:xx:xx:xx:xx:xx brd ff:ff:ff:ff:ff:ff
    altname end0
    inet 192.168.1.2/24 brd 192.168.1.255 scope global dynamic noprefixroute eth0
       valid_lft 51622sec preferred_lft 51622sec
    inet6 fe80::4fa3:f967:1a95:9bf2/64 scope link noprefixroute
       valid_lft forever preferred_lft forever

sysctl.conf 仍然包含了

net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
net.ipv6.conf.lo.disable_ipv6 = 1

重启后登录armbian手动执行 sysctl -p 重载网络配置关闭IPv6

[ophub]

My results are the same as yours. I have also consulted various relevant materials before, but I couldn't find a complete solution. I have included sysctl -p in the startup tasks to execute.

[silverwolf42]

nmcli connection modify "Wired connection 1" ipv6.method disabled works!

refer to https://access.redhat.com/documentation/zh-cn/red_hat_enterprise_linux/8/html/configuring_and_managing_networking/using-networkmanager-to-disable-ipv6-for-a-specific-connection_configuring-and-managing-networking

[ophub]

Thanks for sharing, this method works

[ophub]

https://github.com/ophub/amlogic-s9xxx-armbian/commit/15c259181cf403d7c79ba549521bc551925b6ae6

I added this method to the documentation.