Am 23.02.2017 um 20:52 schrieb Eldridge, Rod A [ITNET]:
Iowa State University is replacing 7 ISC NAMED/BIND servers and 4 ISC DHCP
servers with Infoblox servers on March 14th. We want to keep the domain names
of our external servers the same (with one exception), but we will be changing
all of the IPv4 and IPv6 addresses of those external servers.
Current external name servers:
DNS-1.IASTATE.EDU 129.186.6.249, 2610:130:101:100::249
DNS-2.IASTATE.EDU 129.186.88.249, 2610:130:102:e01::249
ISU.DNS.NORTHERNLIGHTS.GIGAPOP.NET 146.57.253.249, 2607:ea00:1:9::aa
The exception is that we will be removing ISU.DNS.NORTHERNLIGHTS.GIGAPOP.NET (a
server located at the UMN) and will be installing a server at UIowa (that will
be named DNS-3.IASTATE.EDU).
The new IPv4 addresses for the new external name servers will be:
DNS-1.IASTATE.EDU 129.186.67.129
DNS-2.IASTATE.EDU 129.186.67.145
DNS-3.IASTATE.EDU 128.255.x.x <== not yet assigned
We haven't assigned IPv6 addresses yet.
We'd like advice about any issues or problems we might run into and to watch
out for, what preparations should we do or must we do before the switch, and
any other advice to help us make this switch go smoothly and unnoticed.
* startup the new servers
* keep them in sync
* update NS records to the new servers
* update GLUE records
* wait TTL + safety time
* shutdown the old servers
when we speak of TTL - GLUE recors have a *really large* TTL independent
of your zones - but that is no problem at all since for some time you
have running old and new servers
so it don't matter for anybody as long they all have the same zone data
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