RacerX330

Thanks appreciate the feedback. IPv6 is enabled and the router is pfSense and there is only one. There are no other devices sending out RAs.

diagnostics attached. This has been going on for some time now, I have attempted to figure it out myself without any luck. the unraid server is working fine, no issues, but the log spam is really annoying Jan 9 20:57:33 NAS dhcpcd[1700]: br0: dhcp_envoption 31.0/2: Invalid argument Jan 9 20:57:39 NAS dhcpcd[1700]: br0: dhcp_envoption 31.0/2: Invalid argument Jan 9 20:57:39 NAS dhcpcd[1700]: br0: dhcp_envoption 31.0/2: Invalid argument Jan 9 20:57:52 NAS dhcpcd[1700]: br0: dhcp_envoption 31.0/2: Invalid argument Jan 9 20:57:52 NAS dhcpcd[1700]: br0: dhcp_envoption 31.0/2: Invalid argument Jan 9 20:59:49 NAS dhcpcd[1700]: br0: dhcp_envoption 31.0/2: Invalid argument Jan 9 21:00:34 NAS dhcpcd[1700]: br0: dhcp_envoption 31.0/2: Invalid argument Jan 9 21:00:39 NAS dhcpcd[1700]: br0: dhcp_envoption 31.0/2: Invalid argument Jan 9 21:00:40 NAS dhcpcd[1700]: br0: dhcp_envoption 31.0/2: Invalid argument Jan 9 21:00:53 NAS dhcpcd[1700]: br0: dhcp_envoption 31.0/2: Invalid argument Jan 9 21:00:53 NAS dhcpcd[1700]: br0: dhcp_envoption 31.0/2: Invalid argument Jan 9 21:02:49 NAS dhcpcd[1700]: br0: dhcp_envoption 31.0/2: Invalid argument Jan 9 21:03:01 NAS dhcpcd[1700]: br0: dhcp_envoption 31.0/2: Invalid argument as a side note, I did come across this, if it is helpful https://github.com/NetworkConfiguration/dhcpcd/issues/367 thanks in advance for the help nas-diagnostics-20260109-2056.zip

Easy to answer. Because we've seen this before. pfSense comes to mind.