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Unraid didn't renew the ipv6 address from dhcp client after the router restart and get a new prefix from ISP

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Our ISP will assign a new ipv6 prefix for the home network periodically, and also do it when the router restart.

Every time the prefix changes, From dhcpcd log, Unraid will set the route to right value but won't update its own ip. 

I have to restart the unraid server as a workaround. Any approach to prevent it?

I'm using 6.12.6. I tried both SLAAC and DHCPv6 for my router and none of it works for unraid, while the other systems (Windows and Debian) works well.

The diagnostics is attached.

tower-diagnostics-20240228-2308.zip

Edited by Mr.win7
add extra info for network config

  • Community Expert
9 minutes ago, Mr.win7 said:

I'm using 6.12.6

Try updating to v6.12.8, I believe there were some changes with IPv6.

 

 

  • Author
2 minutes ago, JorgeB said:

Try updating to v6.12.8, I believe there were some changes with IPv6.

 

 

Updating. Let me try to repro it tomorrow at my local time.

  • Author
9 hours ago, Mr.win7 said:

Updating. Let me try to repro it tomorrow at my local time.

repro it on 6.12.8. The issue still happens.

tower-diagnostics-20240229-0911.zip

Edited by Mr.win7

  • Author
10 hours ago, JorgeB said:

Try updating to v6.12.8, I believe there were some changes with IPv6.

 

 

Would you please have a look on my newest update? The issue still exists.

  • Community Expert

The diagnostics are not available to download, attached them again.

 

 

  • 2 weeks later...
  • Author
On 2/29/2024 at 5:13 PM, JorgeB said:

The diagnostics are not available to download, attached them again.

 

 

Hi JorgeB, do you have any status can be shared about the progress?

  • Community Expert

I've asked @bonienlto take a look when he can, since basically only he can help, but he has been unavailable lately, so you may need to wait a little longer.

  • Author
On 3/13/2024 at 1:39 AM, JorgeB said:

I've asked @bonienlto take a look when he can, since basically only he can help, but he has been unavailable lately, so you may need to wait a little longer.

Thanks JorgeB and bonienl! I've suffered from the issue for a really long time. The behavior about IPv6 was changed for several times and it become worse each time(sigh

I have the same issure.

  • 2 weeks later...

I do have it as well 

  • 4 weeks later...

Same issue here. Unraid does not pick up the latest prefix from RA. This dynamic prefix shit for private customers is a pain...

Edited by KluthR

In current .10 release I also see permanent DHCPD6 renew messages, didnt remember the exact term, hold on…

 

dhcpcd[1128]: eth0: requesting DHCPv6 information
 

every ten secs. But maybe its because I habe only Stateful RA enabled router?

  • Community Expert

my router does ipv6 porperly. but here is the corect command to release and renew form termainl ipv6 address.

Tested:

ip -6 addr flush dev eth0
ifconfig eth0 inet6 0

 

Replace eth0 with the interface you need to have renewed.

In my case it vhost0 so eth0 becomes vhost0

Edited by bmartino1

  • Author
On 4/22/2024 at 7:24 AM, bmartino1 said:

my router does ipv6 porperly. but here is the corect command to release and renew form termainl ipv6 address.

Tested:

ip -6 addr flush dev eth0
ifconfig eth0 inet6 0

 

Replace eth0 with the interface you need to have renewed.

In my case it vhost0 so eth0 becomes vhost0

Thanks for your command! at least I don't need to restart.

  • Author

Hi @JorgeB and @bonienl, could you please share us the progress or plan about the issue?

Though we can manually flush the IPv6 address, I still want the Unraid to flush it automatically.

  • Community Expert

Bonienl has been unavailable, I expect he will look at this as soon he can after that changes.

  • 2 months later...
  • 1 month later...
  • Community Expert

Can anyone please confirm if this is still an issue with v7.0.0-beta?

  • 10 months later...

I've just encountered this issue with unraid 7.1.4, rebooting router means I get new ipv4 and ipv6 addresses, although on unraid I have fixed ipv4 the ipv6 address is given by the router, I ignored the issue overnight to see if it would correct its self but it did not.

I tried:

ip -6 addr flush dev br0
ifconfig br0 inet6 0

but ifconfig did not work, so i was forced to use:

nohup bash -c "ifconfig br0 down && ifconfig br0 up" &

It would be nice if unraid could periodically renew the ipv6 lease when in this configuration to ensure is it updated after router restart

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