Re: Using CNAME entries in Windows DNS

["Roger Vicker, CCP" <rv-tech@xxxxxxxxxx>]

In your example you are defining the same thing twice.

"Fully qualified domain name (FQDN): timbukto.corp.dekko.com"

You need to be define the IP address in one domain. "corp.dekko.com" in
your example.

And then create the cname "timbukto" in the other domain "dekko-1" and
make the target the first name --> "timbukto.corp.dekko.com"

In other words you've got the two FQDN's backwards in creating your cname.

cname is like an alias that point towards the end TARGET.

You can also use cname to create alias names in the same domain. Say you
replace a server but you have to parallel them to transfer files so they
can't have the same name. But when you are done you don't want to rename
the new server and don't want the users to have to learn a new server
name. After deleting the first server SERVER1.corp.dekko.com, create a
cname SERVER1.corp.dekko.com with a target of SERVER2.corp.dekko.com.

Roger Vicker, CCP


On 8/28/2017 2:35 PM, Rob Berendt wrote:
> Our internal domain is currently dekko-1.  While it follows standards many 
> OS's and other items snicker at the thought of standards.  So we've been 
> phasing in corp.dekko.com for use internally.  So I've been putting some 
> addresses as A records in both domains.  So I'll have a mygadget.dekko-1 
> and a mygadget.corp.dekko.com both pointing to 10.10.6.172.
> It's been suggested to me that I use cname stuff instead.  So, since we're 
> transitioning to corp.dekko.com it makes sense to me to put the A record 
> in corp.dekko.com and the cname to dekko-1.
>
> So now I have this A record:
> Host (uses parent domain if left blank):  timbukto
> Fully qualified domain name (FQDN):  timbukto.corp.dekko.com
> IP address:  10.10.6.172
> "Update associated pointer (PTR) record" is checked.
>
> I right click on the domain and tell it I want to create a new alias or 
> CNAME.
> Alias name (uses parent domain if left blank):  timbukto
> Fully qualified domain name (FQDN):  timbukto.corp.dekko.com
> Fully qualified domain name (FQDN) for target host:  timbukto.dekko-1
>
> This results in:
> A new record cannot be created.
> An alias (CNAME) record cannot be added to this DNS name.
> The DNS name contains records that are incompatible with the CNAME record.
>
>
>
> Rob Berendt