sozotech

Well-Known Member
Jul 26, 2013
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Root Administrator
I am looking to request IPv6 space from our colo providers but am a little fuzzy on what I should be requesting. We have a couple hundred servers/VPSes on various ipv4 subnets though they are basically overlaid on one physical VLAN, not separate subnets. I want to add IPv6 addresses to these existing servers.

I am unclear about is the difference between an IPv6 address and an IPv6 Range. According to the link below the shared IP cannot be part of the the range.

Guide to IPv6 - How to Get Started With IPv6 - Version 68 Documentation - cPanel Documentation

Should I request a /48 or /64 from from our provider? How should I subnet / allocate the addresses to the servers and keep the shared IP separate from the range for dedicated customers?

If someone could give me a typical layout for a web hosting provider that would be appreciated. I am still trying to wrap my mind around how IPv6 works in this regard.

Best regards,
Eric
 

cPanelMichael

Administrator
Staff member
Apr 11, 2011
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Hello Eric,

We recommend that you request both an IPv6 range, and a separate single IPv6 address that isn't part of that range. This way you can use the single IPv6 address as the main shared IPV6 address, and then use the IPv6 addresses in the range to assign a dedicated IPv6 addresses to accounts. Recommended rollout procedures typically use the /64 netmask.

Let me know if you have any trouble during the setup and I'll be happy to walk you through any areas where you are unsure of how to proceed.

Thank you.
 

sozotech

Well-Known Member
Jul 26, 2013
104
3
68
cPanel Access Level
Root Administrator
So would this make sense... should I request a /48 and then split that into one /64 for all of the individual shared addresses and the rest of the /64 subnets for the dedicated ranges on each server?

Best regards,
Eric
 

cPanelMichael

Administrator
Staff member
Apr 11, 2011
47,910
2,215
363
Hi Eric,

Yes, that's one way to do it. However, keep in mind the system will not allow you to set a shared IP address that exists within any configured IPv6 address range. Thus, each shared IPv6 address can't exist in a range that you've added.

Thank you.
 

cPanelMichael

Administrator
Staff member
Apr 11, 2011
47,910
2,215
363
Yeah what I was proposing is 1 subnet for individual shared IP's and a bunch of other subnets for each servers ranges.
Yes, that's acceptable as long as the individual IP addresses are not part of an existing range added to the server.

Thank you.