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Server 2012 R2 IPv6 DHCP high availability

I have configured failover for my IPv4 DHCP, and would like to know what to do about IPv6.
If I enable IPv6 one of the DHCP servers I can set up reservations and DNS servers and all that good stuff, but if that server goes down then there is a big mess.

What is the recommended solution?

Autoconfiguration is not an option.
And router advertisement is so scary I don't want to go that way either.
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Carol Chisholm
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Carol Chisholm
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1 Solution
 
Cliff GaliherCommented:
You can still do split scopes in DHCPv6. This is how DHCP redundancy was often done pre-2012. Look up the 80/20 rule if you are unfamiliar, with the very address space of IPv6, doing a full 50/50 is perfectly reasonable. You'd want an IPAM in place to track addresses though. Monitoring leases from multiple DHCP servers can be hairy.

With that said, I still prefer router advertisement. Nothing scary about it.
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Carol ChisholmAuthor Commented:
I just hate it when a wireless access point or worse still a laptop changes the default gateway.
Don't have the  resources for an IPAM.

How do I keep reservations in sync on split scope servers?
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Carol ChisholmAuthor Commented:
The failover for IPv4 is so easy and pretty robust.
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Cliff GaliherCommented:
You can't keep reservations in sync automatically. That'll be a manual process. 2012 comes with an IPAM as a free installable role.
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Carol ChisholmAuthor Commented:
I could not get the IPAM to work for IPv6. Have you tried it?
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Cliff GaliherCommented:
It works with DHCPv6 and DNS. It does not work with stateless autoconfiguration, which you stated you didn't want to use. Yes, I have tried it.
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Carol ChisholmAuthor Commented:
OK maybe I'll give it another go...
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Carol ChisholmAuthor Commented:
helpful
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