How to configure IPV6 /53 subnet on packet tracer?

[c00kie123]

Hi all, I have tried configuring a Ipv6 subnet address 2001:0dce:0000:0000::1/53 into the router interface.

It works but when the I tried setting the auto-configuration button on the PC connected to this interface, it does not work. However, if I put the Ipv6 address as 2001:0dce:0000:0000::1/64, it works instead. But for my project, it requires a /53 prefix length. How can I fix this?

[Seb Rupik]

Hi there,

SLAAC requires an interface to be configured with an IPv6 address with a 64-bit prefix, it will not working with anything else.

A /53 network mask is your address allocation for a site/ AS, you should look to carve it up as required, using /64 prefixes for the majority of network interfaces.

cheers,

Seb.