Error about IPv6 link local route to gateway already in routing table

[GrantSquirt8415]

Hello,

Running OPNsense 25.1.b_20-amd64 for a few days after a clean install (no configuration brought over from previous setup)
Functionally, everything seems to be running well. No client errors and the system seems to boot more quickly than on the 24.7 image.
I am getting this odd error message, which does not seem to impact the functionality of the firewall, but wanted to share to see if this is anything that may require additional review:

Time	Severity	Process	Message
2024-12-30T16:19:32	Error	opnsense-devel	/usr/local/etc/rc.newwanipv6: The command '/sbin/route add -host -'inet6' 'fe80::aedf:9fff:fe61:ecd8' 'fe80::aedf:9fff:fe61:ecd8%igb3'' returned exit code '1', the output was 'add host fe80::aedf:9fff:fe61:ecd8: gateway fe80::aedf:9fff:fe61:ecd8%igb3 fib 0: route already in table'

If this is of any concern, please let me know and I can provide additional information.

Thank you

[GrantSquirt8415]

Just to add a little, my concern is that this error is popping up about every 15-95 seconds, which in internet time isn't that long, but not sure if this could either purposely or accidentally become a DOS issue (below are the last 20 log entries)

Date                   Severity  Process        Line    
2024-12-30T22:28:45   Error   opnsense-devel   /usr/local/etc/rc.newwanipv6: The command '/sbin/route add -host -'inet6' 'fe80::aedf:9fff:fe61:ecd8' 'fe80::aedf:9fff:fe61:ecd8%igb3'' returned exit code '1', the output was 'add host fe80::aedf:9fff:fe61:ecd8: gateway fe80::aedf:9fff:fe61:ecd8%igb3 fib 0: route already in table'   
2024-12-30T22:27:45   Error   opnsense-devel   /usr/local/etc/rc.newwanipv6: The command '/sbin/route add -host -'inet6' 'fe80::aedf:9fff:fe61:ecd8' 'fe80::aedf:9fff:fe61:ecd8%igb3'' returned exit code '1', the output was 'add host fe80::aedf:9fff:fe61:ecd8: gateway fe80::aedf:9fff:fe61:ecd8%igb3 fib 0: route already in table'   
2024-12-30T22:26:45   Error   opnsense-devel   /usr/local/etc/rc.newwanipv6: The command '/sbin/route add -host -'inet6' 'fe80::aedf:9fff:fe61:ecd8' 'fe80::aedf:9fff:fe61:ecd8%igb3'' returned exit code '1', the output was 'add host fe80::aedf:9fff:fe61:ecd8: gateway fe80::aedf:9fff:fe61:ecd8%igb3 fib 0: route already in table'   
2024-12-30T22:25:45   Error   opnsense-devel   /usr/local/etc/rc.newwanipv6: The command '/sbin/route add -host -'inet6' 'fe80::aedf:9fff:fe61:ecd8' 'fe80::aedf:9fff:fe61:ecd8%igb3'' returned exit code '1', the output was 'add host fe80::aedf:9fff:fe61:ecd8: gateway fe80::aedf:9fff:fe61:ecd8%igb3 fib 0: route already in table'   
2024-12-30T22:24:45   Error   opnsense-devel   /usr/local/etc/rc.newwanipv6: The command '/sbin/route add -host -'inet6' 'fe80::aedf:9fff:fe61:ecd8' 'fe80::aedf:9fff:fe61:ecd8%igb3'' returned exit code '1', the output was 'add host fe80::aedf:9fff:fe61:ecd8: gateway fe80::aedf:9fff:fe61:ecd8%igb3 fib 0: route already in table'   
2024-12-30T22:23:45   Error   opnsense-devel   /usr/local/etc/rc.newwanipv6: The command '/sbin/route add -host -'inet6' 'fe80::aedf:9fff:fe61:ecd8' 'fe80::aedf:9fff:fe61:ecd8%igb3'' returned exit code '1', the output was 'add host fe80::aedf:9fff:fe61:ecd8: gateway fe80::aedf:9fff:fe61:ecd8%igb3 fib 0: route already in table'   
2024-12-30T22:22:45   Error   opnsense-devel   /usr/local/etc/rc.newwanipv6: The command '/sbin/route add -host -'inet6' 'fe80::aedf:9fff:fe61:ecd8' 'fe80::aedf:9fff:fe61:ecd8%igb3'' returned exit code '1', the output was 'add host fe80::aedf:9fff:fe61:ecd8: gateway fe80::aedf:9fff:fe61:ecd8%igb3 fib 0: route already in table'   
2024-12-30T22:21:45   Error   opnsense-devel   /usr/local/etc/rc.newwanipv6: The command '/sbin/route add -host -'inet6' 'fe80::aedf:9fff:fe61:ecd8' 'fe80::aedf:9fff:fe61:ecd8%igb3'' returned exit code '1', the output was 'add host fe80::aedf:9fff:fe61:ecd8: gateway fe80::aedf:9fff:fe61:ecd8%igb3 fib 0: route already in table'   
2024-12-30T22:20:45   Error   opnsense-devel   /usr/local/etc/rc.newwanipv6: The command '/sbin/route add -host -'inet6' 'fe80::aedf:9fff:fe61:ecd8' 'fe80::aedf:9fff:fe61:ecd8%igb3'' returned exit code '1', the output was 'add host fe80::aedf:9fff:fe61:ecd8: gateway fe80::aedf:9fff:fe61:ecd8%igb3 fib 0: route already in table'   
2024-12-30T22:19:45   Error   opnsense-devel   /usr/local/etc/rc.newwanipv6: The command '/sbin/route add -host -'inet6' 'fe80::aedf:9fff:fe61:ecd8' 'fe80::aedf:9fff:fe61:ecd8%igb3'' returned exit code '1', the output was 'add host fe80::aedf:9fff:fe61:ecd8: gateway fe80::aedf:9fff:fe61:ecd8%igb3 fib 0: route already in table'   
2024-12-30T22:18:45   Error   opnsense-devel   /usr/local/etc/rc.newwanipv6: The command '/sbin/route add -host -'inet6' 'fe80::aedf:9fff:fe61:ecd8' 'fe80::aedf:9fff:fe61:ecd8%igb3'' returned exit code '1', the output was 'add host fe80::aedf:9fff:fe61:ecd8: gateway fe80::aedf:9fff:fe61:ecd8%igb3 fib 0: route already in table'   
2024-12-30T22:17:45   Error   opnsense-devel   /usr/local/etc/rc.newwanipv6: The command '/sbin/route add -host -'inet6' 'fe80::aedf:9fff:fe61:ecd8' 'fe80::aedf:9fff:fe61:ecd8%igb3'' returned exit code '1', the output was 'add host fe80::aedf:9fff:fe61:ecd8: gateway fe80::aedf:9fff:fe61:ecd8%igb3 fib 0: route already in table'   
2024-12-30T22:16:45   Error   opnsense-devel   /usr/local/etc/rc.newwanipv6: The command '/sbin/route add -host -'inet6' 'fe80::aedf:9fff:fe61:ecd8' 'fe80::aedf:9fff:fe61:ecd8%igb3'' returned exit code '1', the output was 'add host fe80::aedf:9fff:fe61:ecd8: gateway fe80::aedf:9fff:fe61:ecd8%igb3 fib 0: route already in table'   
2024-12-30T22:15:45   Error   opnsense-devel   /usr/local/etc/rc.newwanipv6: The command '/sbin/route add -host -'inet6' 'fe80::aedf:9fff:fe61:ecd8' 'fe80::aedf:9fff:fe61:ecd8%igb3'' returned exit code '1', the output was 'add host fe80::aedf:9fff:fe61:ecd8: gateway fe80::aedf:9fff:fe61:ecd8%igb3 fib 0: route already in table'   
2024-12-30T22:14:45   Error   opnsense-devel   /usr/local/etc/rc.newwanipv6: The command '/sbin/route add -host -'inet6' 'fe80::aedf:9fff:fe61:ecd8' 'fe80::aedf:9fff:fe61:ecd8%igb3'' returned exit code '1', the output was 'add host fe80::aedf:9fff:fe61:ecd8: gateway fe80::aedf:9fff:fe61:ecd8%igb3 fib 0: route already in table'   
2024-12-30T22:13:45   Error   opnsense-devel   /usr/local/etc/rc.newwanipv6: The command '/sbin/route add -host -'inet6' 'fe80::aedf:9fff:fe61:ecd8' 'fe80::aedf:9fff:fe61:ecd8%igb3'' returned exit code '1', the output was 'add host fe80::aedf:9fff:fe61:ecd8: gateway fe80::aedf:9fff:fe61:ecd8%igb3 fib 0: route already in table'   
2024-12-30T22:12:45   Error   opnsense-devel   /usr/local/etc/rc.newwanipv6: The command '/sbin/route add -host -'inet6' 'fe80::aedf:9fff:fe61:ecd8' 'fe80::aedf:9fff:fe61:ecd8%igb3'' returned exit code '1', the output was 'add host fe80::aedf:9fff:fe61:ecd8: gateway fe80::aedf:9fff:fe61:ecd8%igb3 fib 0: route already in table'   
2024-12-30T22:12:07   Error   opnsense-devel   /usr/local/etc/rc.newwanipv6: The command '/sbin/route add -host -'inet6' 'fe80::aedf:9fff:fe61:ecd8' 'fe80::aedf:9fff:fe61:ecd8%igb3'' returned exit code '1', the output was 'add host fe80::aedf:9fff:fe61:ecd8: gateway fe80::aedf:9fff:fe61:ecd8%igb3 fib 0: route already in table'   
2024-12-30T22:12:04   Notice   dhcp6c   dhcp6c_script: RENEW on igb3 executing   
2024-12-30T22:11:45   Error   opnsense-devel   /usr/local/etc/rc.newwanipv6: The command '/sbin/route add -host -'inet6' 'fe80::aedf:9fff:fe61:ecd8' 'fe80::aedf:9fff:fe61:ecd8%igb3'' returned exit code '1', the output was 'add host fe80::aedf:9fff:fe61:ecd8: gateway fe80::aedf:9fff:fe61:ecd8%igb3 fib 0: route already in table'