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No subnet6 declaration for enp2s0 (2001:470:1f1a:5b3::2)

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Patrik Laszlo

No subnet6 declaration for enp2s0 (2001:470:1f1a:5b3::2)

Ciao!

How are you?

This is weird! I got IP4 DHCP, it works. But with IPV6 not working.

Do you know what it could be?

Settings:

INTERFACE

allow-hotplug enp2s0
iface enp2s0 inet static
    metric 10
    address 192.168.78.20
    netmask 255.255.255.0
    broadcast 192.168.78.255
    gateway    192.168.78.1

iface enp2s0 inet6 static
    metric 10
    address 2001:470:1f1a:5b3::2
    netmask 64
    gateway 2001:470:1f1a:5b3::1

auto he-ipv6
iface he-ipv6 inet6 v4tunnel
        address 2001:470:1f1a:5b3::2
        netmask 64
        endpoint 216.66.87.14
        local 192.168.78.20
        ttl 255
        gateway 2001:470:1f1a:5b3::1

allow-hotplug enp1s0
iface enp1s0 inet dhcp
    metric 30
    post-up ip route add 192.168.81.0/24 dev enp1s0 src 192.168.81.20 table rt2
    post-up ip route add default via 192.168.81.1 dev enp1s0 table rt2
    post-up    ip rule add from 192.168.81.20/32 table rt2
    post-up ip rule add to 192.168.81.20/32 table rt2

DHCPD6

subnet6 2001:470:1f1b:5b3::/64 {
        range6 2001:470:1f1b:5b3::50 2001:470:1f1b:5b3::ffff;
        range6 2001:470:1f1b:5b3::/64 temporary;
       option dhcp6.name-servers 2001:470:1f1a:5b3::2;
       option dhcp6.domain-search "patrikx3.tk";
}

SERVER

root@server:~# dhcpd -6 -d -cf /etc/dhcp/dhcpd6.conf enp2s0
Internet Systems Consortium DHCP Server 4.3.5
Copyright 2004-2016 Internet Systems Consortium.
All rights reserved.
For info, please visit https://www.isc.org/software/dhcp/
Config file: /etc/dhcp/dhcpd6.conf
Database file: /var/lib/dhcp/dhcpd6.leases
PID file: /var/run/dhcpd6.pid
Wrote 0 NA, 0 TA, 0 PD leases to lease file.

No subnet6 declaration for enp2s0 (2001:470:1f1a:5b3::2).
** Ignoring requests on enp2s0. If this is not what
   you want, please write a subnet6 declaration
   in your dhcpd.conf file for the network segment
   to which interface enp2s0 is attached. **

Not configured to listen on any interfaces!

If you think you have received this message due to a bug rather
than a configuration issue please read the section on submitting
bugs on either our web page at www.isc.org or in the README file
before submitting a bug. These pages explain the proper
process and the information we find helpful for debugging..

exiting.

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Simon Hobson

Re: No subnet6 declaration for enp2s0 (2001:470:1f1a:5b3::2)

Patrik Laszlo <[hidden email]> wrote:

> This is weird! I got IP4 DHCP, it works. But with IPV6 not working.
>
> Do you know what it could be?
> ...
> iface enp2s0 inet6 static
> metric 10
> address 2001:470:1f1a:5b3::2
> netmask 64
> gateway 2001:470:1f1a:5b3::1
>
> auto he-ipv6
> iface he-ipv6 inet6 v4tunnel
> address 2001:470:1f1a:5b3::2
> netmask 64
> endpoint 216.66.87.14
> local 192.168.78.20
> ttl 255
> gateway 2001:470:1f1a:5b3::1
> ...
>
> DHCPD6
>
> subnet6 2001:470:1f1b:5b3::/64 {
> range6 2001:470:1f1b:5b3::50 2001:470:1f1b:5b3::ffff;
> range6 2001:470:1f1b:5b3::/64 temporary;
> option dhcp6.name-servers 2001:470:1f1a:5b3::2;
> option dhcp6.domain-search "patrikx3.tk";
> }
> SERVER

Typo in ethernet config ? You've used the prefix from the HE tunnel rather than the routed /64.
Easy to miss when you are staring at a screen and your eyes have gone square looking for the problem.

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