IPv6 to only some clients

Software SW help
1

Hello,
is possible to configure Omnia to give IPv6 address to just a few clients I specify (mac address)?
Thanks

2

I’m just guessing, but approach similar to this might do it: Yamaha receiver problem with Knot DNS

3

This is probably possible, but the client’s “duid” must be known. This will be written to etc/config/dhcp (handwritten because it is not possible via Luci)

config host
    option name 'client name'
    option mac 'XX:XX:XX:XX:XX:XX'
    option ip '192.168.1.100'
    option hostid '100' # client required ipv6 address
    option duid '1234567891234565'

But this is not possible on an Android phone because they do not have a DUID number.

4

Thanks. Actually I need IPv6 only for LXC container and some ethernet devices, but not for any wifi client.

5

Wouldn’t be better to split the network to more "sub"networks - one with IPv6 and the second without?

6

The question is, how to do it? :slight_smile: Is there any guide? Thanks for help

7

As IPv6 router information are multicasted, you cannot selectively enable or disable IPv6 per device. You can, however, create separate network by cloning lan section from /etc/config/network like this:

config interface 'lan2'
    #option ifname 'eth0 eth2'  # commented out so it doesn't conflict
    option force_link '1'
    option type 'bridge'
    option proto 'static'
    option ipaddr '192.168.2.1'  # different IP range
    option netmask '255.255.255.0'
    #option ip6assign '60' # commented so IPv6 is disabled in this network

You also have to add lan2 to appropriate firewall zone.

3 Likes
8

Thanks, it sounds good.

Probably I have to clone some lines in /etc/config/dhcp too?

Like this:

config dhcp ‘lan2’
option interface ‘lan2’
option start ‘100’
option leasetime ‘12h’
#option dhcpv6 ‘server’
option ra ‘server’
option limit ‘200’
list dhcp_option ‘6,192.168.2.1’
option ra_management ‘1’

Thanks

9

@Michelle yes, exactly.

Thanks @Ondrej_Caletka for your precise answer. My description would be much more complicated :).