forward DNS mapping to another NS address pool

[richard pratt]

I have been given a request to add a forward DNS mapping. The IP address 
is for an IP pool not controlled by ourselves and no forward address has 
been created by the authoritive nameserver. Strangely only a reverse and 
now their is a need for a forward address.

This is what was suggested for our zone file

name		IN 	A  address from other ISP address pool not Authotive Name 
Server for

I'm not in contact with the other ISP and so it would be nice if I could 
sort it all out my end, but my understanding is that they need to give 
it a name to which I alias. I.E they are the daddy, while my side is 
just a link

so the record in my zone file would be

name		IN 	CNAME	name.domainname

But an evil shadow of doubt has come to my mind telling me that in my 
ignorance their may be another way. Please can someone give me an 
authoritive answer.

Kind Regards