dhcpcd-discuss

Hi James

On 17/04/2020 16:51, James G wrote:
> Apr 17 12:46:26 localhost dhcpcd[292]: eth0: Router Advertisement from fe80::1
> Apr 17 12:46:26 localhost dhcpcd[292]: eth0: no global addresses for default route
> Apr 17 12:46:26 localhost dhcpcd[292]: eth0: adding route to 2001:8b0:de0a:bb0d::/64
> Apr 17 12:46:26 localhost dhcpcd[292]: eth0: executing `/lib/dhcpcd/dhcpcd-run-hooks' ROUTERADVERT
> Apr 17 12:46:26 localhost dhcpcd[321]: eth0: Router Advertisement from fe80::1
> Apr 17 12:46:26 localhost dhcpcd[321]: eth0: no global addresses for default route
> Apr 17 12:46:26 localhost dhcpcd[321]: eth0: adding route to 2001:8b0:de0a:bb0d::/64
> Apr 17 12:46:26 localhost dhcpcd[321]: eth0: executing `/lib/dhcpcd/dhcpcd-run-hooks' ROUTERADVERT
> Apr 17 12:46:26 localhost dhcpcd[292]: eth0: reading lease `/var/lib/dhcpcd5/eth0.lease6'
> Apr 17 12:46:26 localhost dhcpcd[321]: eth0: reading lease `/var/lib/dhcpcd5/eth0.lease6'
> Apr 17 12:46:26 localhost dhcpcd[292]: eth0: confirming prior DHCPv6 lease
> Apr 17 12:46:26 localhost dhcpcd[321]: eth0: confirming prior DHCPv6 lease
> Apr 17 12:46:26 localhost dhcpcd[321]: eth0: delaying CONFIRM6 (xid 0xa2be78), next in 1.0 seconds
> Apr 17 12:46:26 localhost dhcpcd[292]: eth0: delaying CONFIRM6 (xid 0xa2be78), next in 1.0 seconds
> Apr 17 12:46:26 localhost dhcpcd[292]: eth0: ARP probing 192.168.55.26 (3 of 3), next in 2.0 seconds
> Apr 17 12:46:26 localhost dhcpcd[321]: eth0: ARP probing 192.168.55.26 (3 of 3), next in 2.0 seconds
> Apr 17 12:46:27 localhost dhcpcd[292]: eth0: broadcasting CONFIRM6 (xid 0xa2be78), next in 1.0 seconds
> Apr 17 12:46:27 localhost dhcpcd[321]: eth0: broadcasting CONFIRM6 (xid 0xa2be78), next in 1.0 seconds
> Apr 17 12:46:27 localhost dhcpcd[321]: eth0: REPLY6 received from fe80::be99:11ff:fe81:6408
> Apr 17 12:46:27 localhost dhcpcd[292]: eth0: REPLY6 received from fe80::be99:11ff:fe81:6408
> Apr 17 12:46:27 localhost dhcpcd[292]: eth0: adding address 2001:8b0:de0a:bb0d::3/128
> Apr 17 12:46:27 localhost dhcpcd[292]: eth0: pltime 86400 seconds, vltime 86400 seconds
> Apr 17 12:46:27 localhost dhcpcd[292]: eth0: renew in 41232, rebind in 67152, expire in 84432 seconds
> Apr 17 12:46:27 localhost dhcpcd[321]: eth0: adding address 2001:8b0:de0a:bb0d::3/128
> Apr 17 12:46:27 localhost dhcpcd[292]: eth0: waiting for DHCPv6 DAD to complete
> Apr 17 12:46:27 localhost dhcpcd[292]: eth0: adding default route via fe80::1
> Apr 17 12:46:27 localhost dhcpcd[321]: eth0: pltime 86400 seconds, vltime 86400 seconds
> Apr 17 12:46:27 localhost dhcpcd[321]: eth0: renew in 41232, rebind in 67152, expire in 84432 seconds
> Apr 17 12:46:27 localhost dhcpcd[321]: eth0: waiting for DHCPv6 DAD to complete
> Apr 17 12:46:27 localhost dhcpcd[321]: eth0: adding default route via fe80::1
> Apr 17 12:46:28 localhost dhcpcd[292]: eth0: pid 0 deleted address 2001:8b0:de0a:bb0d::3/128
> Apr 17 12:46:28 localhost dhcpcd[321]: eth0: pid 0 deleted address 2001:8b0:de0a:bb0d::3/128
> Apr 17 12:46:28 localhost dhcpcd[292]: eth0: deleting default route via fe80::1
> Apr 17 12:46:28 localhost dhcpcd[321]: eth0: deleting default route via fe80::1
> Apr 17 12:46:28 localhost kernel: [   12.877707] IPv6: eth0: IPv6 duplicate address 2001:8b0:de0a:bb0d::3 used by 34:12:98:04:2f:3d detected!
>
> The DHCPv6 DAD see the address being advertise by another machine.
>
> When I deleted /var/lib/dhcpcd5/eth0.lease6 the rpi sucesfully negotiated a valid DHCPv6 address.
>
> Is there something you can do about this? Should the lease file be removed or some other solution?
>
> Thank you for making this program, I now know a lot more about IPv6!

Looks to me like you have two competing processes  292 and 321.
What does this command look like?
ps axu | grep dhc

Roy