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How to setup a IPv6/64 subnet from a /56 from my ISP

Martin Walter

Hi,

I'm not too familiar with IPv6 yet and I'm struggling with my setup.

I got assigned a subnet 2001:xxxx:yyyy:zz00::/56 from my ISP with 2001:xxxx:yyyy:zz00::1 as the gateway.
I assigned 2001:xxxx:yyyy:zz00::2/56 to my WAN interface and can ping that address from/to the firewall in both directions.

Now I want to use the subnet 2001:xxxx:yyyy:zz01::/64 on my internal network.

I assigned the 2001:xxxx:yyyy:zz01::1/64 to my internal interface and 2001:xxxx:yyyy:zz01::2/64 to a connected computer with 2001:xxxx:yyyy:zz01::1 as the gateway.

I can't even ping between the firewall and the computer and of course there is no internet connection.

What am I dong wrong and how can I fix this?

Best regards
Martin



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  • 0
    Martin Walter said:

    I got assigned a subnet 2001:xxxx:yyyy:zz00::/56 from my ISP with 2001:xxxx:yyyy:zz00::1 as the gateway.
    I assigned 2001:xxxx:yyyy:zz00::2/56 to my WAN interface and can ping that address from/to the firewall in both directions.

    Now I want to use the subnet 2001:xxxx:yyyy:zz01::/64 on my internal network.

    How do you tell your upstream router, that 2001:xxxx:yyyy:zz01::/64 is reachable by 2001:xxxx:yyyy:zz00::2 ? Static configuration at the ISP router or dynamically?

    Martin Walter said:
    I can't even ping between the firewall and the computer and of course there is no internet connection.

    You mean you can't ping between 2001:xxxx:yyyy:zz01::1 and 2001:xxxx:yyyy:zz01::2 ? This should work nontheless, maybe a firewall issue (Windows blocks pings by default, Sophos too - see option "gateway is pingable").

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  • 0
    Martin Walter said:

    I got assigned a subnet 2001:xxxx:yyyy:zz00::/56 from my ISP with 2001:xxxx:yyyy:zz00::1 as the gateway.
    I assigned 2001:xxxx:yyyy:zz00::2/56 to my WAN interface and can ping that address from/to the firewall in both directions.

    Now I want to use the subnet 2001:xxxx:yyyy:zz01::/64 on my internal network.

    How do you tell your upstream router, that 2001:xxxx:yyyy:zz01::/64 is reachable by 2001:xxxx:yyyy:zz00::2 ? Static configuration at the ISP router or dynamically?

    Martin Walter said:
    I can't even ping between the firewall and the computer and of course there is no internet connection.

    You mean you can't ping between 2001:xxxx:yyyy:zz01::1 and 2001:xxxx:yyyy:zz01::2 ? This should work nontheless, maybe a firewall issue (Windows blocks pings by default, Sophos too - see option "gateway is pingable").

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  • 0 in reply to Alan Brand
    Alan Brand said:
    How do you tell your upstream router, that 2001:xxxx:yyyy:zz01::/64 is reachable by 2001:xxxx:yyyy:zz00::2 ? Static configuration at the ISP router or dynamically?

    That is one of the many questions I have here. The only information I got from my ISP was the /56 subnet and the upstream router address in that subnet.
    I have no idea how to split that /56 into /64 subnets on my local LAN.

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