Can Primary & Secondary NS use different version of BIND?

[Mark_Andrews at isc.org]

> 
> Hi,
> 
> My primary and secondary name server are using bind 8.2.3 and I want to 
> upgrade them to the latest version (bind 9.2.1). But since both of them are 
> live, I intend to upgrade them one by one. My question: is it possible to 
> use bind 9.2.1 on the secondary while the primary is still using bind 8.2.3?

	Yes.

> Since I want to upgrade, is there any incompatibility issues between bind 
> 9.2.1 and bind 8.2.3?

	Not at the wire level unless you are using "multiple-cname yes;".
	See doc/misc/migration.

> 
> Thank you in advance!
> 
> Regards,
> Ivan
> 
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--
Mark Andrews, Internet Software Consortium
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: Mark.Andrews at isc.org