[Bug 1696604] Re: excessive ipv6 adding/deleting default route in artful

Sun Nov 19 15:14:11 UTC 2023

This was reported against a really old version. Closing. Feel free to
re-open if the bug still exists with current versions.

** Changed in: dhcpcd (Ubuntu)
       Status: Confirmed => Invalid

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Title:
  excessive ipv6 adding/deleting default route in artful

Status in dhcpcd package in Ubuntu:
  Invalid

Bug description:
  Package: dhcpcd5
  Version: 6.11.5-0ubuntu1
  Release: artful

  dhcpcd5 in artful is outputting repeated messages about
  adding/deleting ipv6 default routes. I didn't check other releases.

  The actual log is not the problem, but the actual behavior seems to
  be: I don't expect dhcpcd to be adding a default route only to then
  instantly remove it.

  The only similar issue I could find was this one:
  https://serverfault.com/questions/846019/dhcpcd-ipv6-excessive-adding-removing-route-in-log
  but the solution presented there (removing the route manually) does not work on this case.
  I found nothing in dhcpcd bug tracking tool at https://dev.marples.name/maniphest/query/all/

  Copy & paste from syslog:
  Jun  7 17:10:18 localhost dhcpcd[1585]: wlan0: adding default route via fe80::1:1
  Jun  7 17:10:18 localhost dhcpcd[1585]: wlan0: deleted default route via fe80::1:1
  Jun  7 17:10:23 localhost dhcpcd[1585]: wlan0: adding default route via fe80::1:1
  Jun  7 17:10:23 localhost dhcpcd[1585]: wlan0: deleted default route via fe80::1:1
  Jun  7 17:10:29 localhost dhcpcd[1585]: wlan0: adding default route via fe80::1:1
  Jun  7 17:10:29 localhost dhcpcd[1585]: wlan0: deleted default route via fe80::1:1
  Jun  7 17:10:36 localhost dhcpcd[1585]: wlan0: adding default route via fe80::1:1
  Jun  7 17:10:36 localhost dhcpcd[1585]: wlan0: deleted default route via fe80::1:1
  Jun  7 17:10:43 localhost dhcpcd[1585]: wlan0: adding default route via fe80::1:1
  Jun  7 17:10:43 localhost dhcpcd[1585]: wlan0: deleted default route via fe80::1:1
  Jun  7 17:10:49 localhost dhcpcd[1585]: wlan0: adding default route via fe80::1:1
  Jun  7 17:10:49 localhost dhcpcd[1585]: wlan0: deleted default route via fe80::1:1
  Jun  7 17:10:56 localhost dhcpcd[1585]: wlan0: adding default route via fe80::1:1
  Jun  7 17:10:56 localhost dhcpcd[1585]: wlan0: deleted default route via fe80::1:1
  Jun  7 17:11:02 localhost dhcpcd[1585]: wlan0: adding default route via fe80::1:1
  Jun  7 17:11:02 localhost dhcpcd[1585]: wlan0: deleted default route via fe80::1:1
  Jun  7 17:11:08 localhost dhcpcd[1585]: wlan0: adding default route via fe80::1:1
  Jun  7 17:11:08 localhost dhcpcd[1585]: wlan0: deleted default route via fe80::1:1
  Jun  7 17:11:15 localhost dhcpcd[1585]: wlan0: adding default route via fe80::1:1
  Jun  7 17:11:15 localhost dhcpcd[1585]: wlan0: deleted default route via fe80::1:1
  Jun  7 17:11:19 localhost dhcpcd[1585]: wlan0: adding default route via fe80::1:1
  Jun  7 17:11:19 localhost dhcpcd[1585]: wlan0: deleted default route via fe80::1:1
  Jun  7 17:11:22 localhost dhcpcd[1585]: wlan0: adding default route via fe80::1:1
  Jun  7 17:11:22 localhost dhcpcd[1585]: wlan0: deleted default route via fe80::1:1
  Jun  7 17:11:26 localhost dhcpcd[1585]: wlan0: adding default route via fe80::1:1
  Jun  7 17:11:26 localhost dhcpcd[1585]: wlan0: deleted default route via fe80::1:1
  Jun  7 17:11:33 localhost dhcpcd[1585]: wlan0: adding default route via fe80::1:1
  Jun  7 17:11:33 localhost dhcpcd[1585]: wlan0: deleted default route via fe80::1:1
  Jun  7 17:11:38 localhost dhcpcd[1585]: wlan0: adding default route via fe80::1:1
  Jun  7 17:11:38 localhost dhcpcd[1585]: wlan0: deleted default route via fe80::1:1
  Jun  7 17:11:48 localhost dhcpcd[1585]: wlan0: adding default route via fe80::1:1
  Jun  7 17:11:48 localhost dhcpcd[1585]: wlan0: deleted default route via fe80::1:1
  Jun  7 17:11:56 localhost dhcpcd[1585]: wlan0: adding default route via fe80::1:1
  Jun  7 17:11:56 localhost dhcpcd[1585]: wlan0: deleted default route via fe80::1:1
  Jun  7 17:12:05 localhost dhcpcd[1585]: wlan0: adding default route via fe80::1:1
  Jun  7 17:12:05 localhost dhcpcd[1585]: wlan0: deleted default route via fe80::1:1
  Jun  7 17:12:14 localhost dhcpcd[1585]: wlan0: adding default route via fe80::1:1
  Jun  7 17:12:14 localhost dhcpcd[1585]: wlan0: deleted default route via fe80::1:1
  Jun  7 17:12:17 localhost dhcpcd[1585]: wlan0: adding default route via fe80::1:1
  Jun  7 17:12:17 localhost dhcpcd[1585]: wlan0: deleted default route via fe80::1:1
  Jun  7 17:12:27 localhost dhcpcd[1585]: wlan0: adding default route via fe80::1:1
  Jun  7 17:12:27 localhost dhcpcd[1585]: wlan0: deleted default route via fe80::1:1
  Jun  7 17:12:34 localhost dhcpcd[1585]: wlan0: adding default route via fe80::1:1
  Jun  7 17:12:34 localhost dhcpcd[1585]: wlan0: deleted default route via fe80::1:1
  Jun  7 17:12:37 localhost dhcpcd[1585]: wlan0: adding default route via fe80::1:1
  Jun  7 17:12:37 localhost dhcpcd[1585]: wlan0: deleted default route via fe80::1:1

  ======================
  $ cat /etc/dhcpcd.conf 
  # A sample configuration for dhcpcd.
  # See dhcpcd.conf(5) for details.

  # Allow users of this group to interact with dhcpcd via the control socket.
  #controlgroup wheel

  # Inform the DHCP server of our hostname for DDNS.
  hostname

  # Use the hardware address of the interface for the Client ID.
  #clientid
  # or
  # Use the same DUID + IAID as set in DHCPv6 for DHCPv4 ClientID as per RFC4361.
  # Some non-RFC compliant DHCP servers do not reply with this set.
  # In this case, comment out duid and enable clientid above.
  duid

  # Persist interface configuration when dhcpcd exits.
  persistent

  # Rapid commit support.
  # Safe to enable by default because it requires the equivalent option set
  # on the server to actually work.
  option rapid_commit

  # A list of options to request from the DHCP server.
  option domain_name_servers, domain_name, domain_search, host_name
  option classless_static_routes
  # Most distributions have NTP support.
  option ntp_servers
  # Respect the network MTU. This is applied to DHCP routes.
  option interface_mtu

  # A ServerID is required by RFC2131.
  require dhcp_server_identifier

  # Generate Stable Private IPv6 Addresses instead of hardware based ones
  slaac private

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