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How do I decode IPv6 addresses in Linode Manager https://forum.linode.com/viewtopic.php?f=19&t=10219	Page 1 of 1

Author:

knoebelc [ Fri Jul 05, 2013 2:46 pm ]

Post subject:

How do I decode IPv6 addresses in Linode Manager

I had a pool of IPv6 addresses assigned to my Linode. The documentation says I should see a range of addresses, but I see this under the Remote Access tab:

Code:

Public IP Pools    2600:3c03:e000:0049::/64 routed to 2600:3c03::f03c:91ff:fe70:ce00

I understand the second number is the IPv6 of my Linode and that the first number is the beginning of the pool. I don't understand what the IP addresses available to me are. Would they be something like:

Code:

2600:3c03:e000:49::1/64
2600:3c03:e000:49::2/64
2600:3c03:e000:49::3/64

and so on to 2600:3c03:e000:49:ffff:ffff:ffff:ffff ? That would mean I have 18,446,744,073,709,551,616 addresses available to me which seems like a lot more than a lot. The Linode blog on this issues says I should be getting 4,096 addresses.

What am I not understanding correctly?

Author:	nivex [ Fri Jul 05, 2013 2:53 pm ]
Post subject:	Re: How do I decode IPv6 addresses in Linode Manager
It looks like you got one of the routed subnets mentioned in the IPv6 FAQ but the manager is referring to it as a pool. Looks like some language inconsistency that could be fixed up.

Author:	hoopycat [ Fri Jul 05, 2013 3:14 pm ]
Post subject:	Re: How do I decode IPv6 addresses in Linode Manager
That is standard notation for a subnet. /64 means the first 64 bits of the (128-bit) IP address are the network address, and the rest (in this case, 64 bits) are the host address. You've got the full range of host addresses at your disposal. It is a lot, but it is the smallest commonly-used subnet size: MAC addresses formatted in EUI-64 notation fit very nicely into a /64.

Author:	knoebelc [ Mon Jul 08, 2013 9:42 am ]
Post subject:	Re: How do I decode IPv6 addresses in Linode Manager
Thanks, nivex and hoopycat. Your post helped me figure out what the actual addresses available to me are. To summarize for anyone who happens to find this thread useful: * Linode can assign you a /64 subnet, which shows in the manager as I noted in my original post * That subnet makes 18,446,744,073,709,551,616 addresses available to you. They range from 0000:0000:0000:0001 to ffff:ffff:ffff:ffff. The notation is hexadecimal. * To specify the address, take the first half of the address (the part Linode gives you, in my case 2600:3c03:e000:0049) and add one of the the available subnet addresses. * Example: 2600:3c03:e000:0049:0000:0000:0001 (can also be written as 2600:3c03:e000:49::1)

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