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Missing IPv6 routes - reconstruct/reset?

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I have link-local IPv6 enabled on my router (to familiarize myself with IPv6.)

 

I switched unRAID from IPv4 to IPv4 + IPv6 and rebooted:

225346588_ScreenShot2021-08-23at9_27_40AM.thumb.png.5942d035c500e475f085663743056463.png

 

1101141709_ScreenShot2021-08-23at9_44_59AM.png.0aa434461904022b70d5bf4ff95b2fee.png

1671884409_ScreenShot2021-08-23at9_53_07AM.png.2f2399d1c7f9f0d4cca070c487802ad1.png

 

It's recognized (I can ssh) but no IPv6 entries in the routing table:

1516800910_ScreenShot2021-08-23at9_38_32AM.thumb.png.e5a1fe19655496eea890581a11006207.png

 

1872035154_ScreenShot2021-08-23at9_42_04AM.thumb.png.289a91c6af7259de7a3deeefdd845e55.png

 

I could have sworn I used to have some. It's possible I deleted them a while ago and forgot.

I read a post suggesting to reset the routing table by deleting /config/network.cfg so I did that (I moved it to network.cfg.bak) and rebooted.

 

No difference.

Is there another way to reset the routing table or can I reconstruct it?

(My understanding of networking is very basic.)

 

EDIT: I should mention I'm on 6.10.0-rc1 but I suspect my problem's not 6.10-related.

Edited by CS01-HS

  • Author

Maybe some progress.

 

When I tried manually adding the route:

::1 / lo / 256

 

Nothing happened but I saw the following error in the log:

dnsmasq[26655]: no servers found in /etc/resolv.conf, will retry

 

resolve.conf was empty which I seem to have fixed by switching IPv4 from automatic to static then back to automatic:

 

root@NAS:~# cat /etc/resolv.conf
# Generated by dhcpcd from br0.dhcp
domain lan
nameserver 10.0.1.10

 

Now when I try to add ::1 / lo / 256 still nothing happens but no log errors!

Your router is not handing out ipv6 addresses. You need to configure your router to do this.

 

Unraid interfaces have only a link local address, which is not routable, and hence no routing entries.

 

  • Author

Right, it never has. So those routes I saw initially, maybe with 6.9.1, shouldn't have been there. 

 

I was confused because I saw messages like the following (with ssh <hostname>.local)

Welcome to Armbian 21.05.8 Buster with Linux 4.14.222-odroidxu4

System load: 6%           Up time:       0 min
Memory usage: 6% of 1.95G  IP:       10.0.1.100
CPU temp:      42°C           Usage of /:    5% of 29G    
storage/:      13% of 1.8T   storage temp: 23°C           

[ General system configuration (beta): armbian-config ]

No mail.
Last login: Mon Aug 23 08:15:23 2021 from fe80::45c:6b5d:7c81:bb11%enx001e068747ab

 

I guess I'll have to read up on IPv6. Thanks.

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