netplan - trouble converting gateway6 to "to/via" directive

RalphORama

6/23/24, 3:07 PM

I'm attempting to update my netplan config to use a routes directive instead of gateway6 since gateway6 is deprecated.

My working configuration file looks like this:

# /etc/netplan/51-cloud-init-ipv6.yaml
network:
    version: 2
    ethernets:
        eno1:
            dhcp6: no
            match:
              name: eno1
            addresses:
              - "2607:5300:60:2e26::1/128"
            gateway6: "2607:5300:0060:2eff:ff:ff:ff:ff"
            routes:
              - to: "2607:5300:0060:2eff:ff:ff:ff:ff"
                scope: link

While researching, I found this answer suggesting I update my config to look like this:

# /etc/netplan/51-cloud-init-ipv6.yaml
network:
    version: 2
    ethernets:
        eno1:
            dhcp6: no
            match:
              name: eno1
            addresses:
              - "2607:5300:60:2e26::1/128"
            routes:
              - to: default
                via: "2607:5300:0060:2eff:ff:ff:ff:ff"

However, with this configuration, ping6 fails with the error Temporary failure in name resolution.

I have tried multiple combinations of options for routes, including:

routes:
  - to: default
    via: "2607:5300:0060:2eff:ff:ff:ff:ff"
    scope: link

routes:
  - to: default
    via: "2607:5300:0060:2eff:ff:ff:ff:ff"
    scope: link

routes:
  - to: "2607:5300:0060:2eff:ff:ff:ff:ff"
    via: "2607:5300:0060:2eff:ff:ff:ff:ff"

etc. I am unsure of how to convert the gateway6 directive to a routes directive successfully. Any advice would be appreciated. Thanks!

1 + 0

ipv6

networking

netplan

22.04

Score:1

Ubuntu

slangasek

6/23/24, 11:30 PM

You previously had in your config:

        routes:
          - to: "2607:5300:0060:2eff:ff:ff:ff:ff"
            scope: link

This is a separate route from the default route. You should not drop or modify this when moving from gateway6 to routes.

Your final routes stanza should look like:

        routes:
          - to: "2607:5300:0060:2eff:ff:ff:ff:ff"
            scope: link
          - to: default
            via: "2607:5300:0060:2eff:ff:ff:ff:ff"

+ 1

RalphORama

6/27/24, 7:47 PM

this + `systemctl reboot` fixed my issue, thank you very much!

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: netplan - trouble converting gateway6 to "to/via" directive

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