[Bug 1862481] Re: Cannot set accept-ra to 2, and keep reseting it to 0

[XSpielinbox]

** Also affects: netplan.io (Ubuntu)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1862481

Title:
  Cannot set accept-ra to 2, and keep reseting it to 0

Status in netplan:
  New
Status in netplan.io package in Ubuntu:
  Confirmed

Bug description:
  As netplan is not supporting ipv6-pd now, we have to rely on other
  dhcpv6 client like dibbler-client or wide-dhcpv6-client. In order for
  those tools to work, /proc/sys/net/ipv6/conf/wan/accept_ra need to be
  2. However, with setting like following:

  network:
    version: 2
    renderer: networkd
    ethernets:
      wan:
        dhcp4: true
        dhcp-identifier: mac
        link-local: [ ]

  /proc/sys/net/ipv6/conf/wan/accept_ra will always reset to 0.

  The "accept-ra" option doesn't help as it only accept yes/no.

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