Ask Ubuntu Asked by Jackobli on February 9, 2021
Hello and thank you for reading
Ubuntu 20.04 LTS with
SLAAC mainly because easy use in this network. Static for servers, that are needed to contacted from the outside.
For outgoing traffic, the system is always using the SLAAC (Autoconfig) address 🙁
I was thinking about stopping SLAAC/Autoconfig, but I read, this could harm RA / Path MTU discovery and such things.
So I found, that I could set a route manually. Works like a charm on the cmdline/bash
sudo ip -6 route del AlreadyExistingRoutes
sudo ip -6 route add 2001:0db8:dead:8000::/64 src 2001:0db8:dead:8000::2000 dev ens192
I tried to write that config into /etc/netplan/01-netcfg.yaml
network:
version: 2
renderer: networkd
ethernets:
ens192:
dhcp4: no
dhcp6: no
addresses:
- '2001:0db8:dead:8000::4000/64'
routes:
- to: '2001:0db8:dead:8000::/64'
scope: link
from: '2001:0db8:dead:8000::4000/64'
via: '2001:0db8:dead:8000::1'
These are example IPv6 addresses
But this netplan YAML is not doing, what I want.
Thank you for any hints.
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