said by timcuth:
Try using 2620:0000:0ccc:0000:0000:0000:0000:0002 and 2620:0000:0ccd:0000:0000:0000:0000:0002
Tim already provided the correct answer but here is why:
In IPv6 addresses a single colon separates each block of 4 hex digits and a double colon (::) stands for a variable number of 0 digits. The double colon is only permitted once within any IPv6 address in order to avoid ambiguity and furthermore the double colon is supposed to be used for the longest continuous sequence of 0s in the IPv6 address. Apart from the special case of the double colon, leading 0s in each block of an IPv6 address may be omitted as long as there is still one digit left in the block (the remaining digit may be a 0).
Your router doesn't support entering the short form IPv6 addresses, instead it has 8 entry fields for 4 hex digits and you need to expand the short form of the IPv6 address into the full form (which is what Tim did for you).--
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