Hi,

I can confirm that it’s ok to skip 9.16 and go straight to 9.18. There’s no 
need for the intermediate step. As usual, it’s recommended to do a test 
migration first if you want to be extra careful.

Ondrej
--
Ondřej Surý — ISC (He/Him)

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> On 21. 4. 2023, at 9:41, Stacey Marshall <stacey.marsh...@gmail.com> wrote:
> 
> 
> If it helps, my assessment was that one could skip 9.16 too.
> 
> I recognise that this is thanks to the hard effort that ISC work to provide 
> backward compatibility, and not by some accident.
> 
> On Solaris 11.4 current shipping versions of BIND are
> 
> $ pkg list -fa service/network/dns/bind 
> NAME (PUBLISHER) VERSION IFO 
> service/network/dns/bind 9.18.11.0.0-11.4.55.0.1.138.1 --- 
> service/network/dns/bind 9.16.33.0.0-11.4.54.0.1.138.0 --- 
> service/network/dns/bind 9.16.33.0.0-11.4.51.0.1.132.0 --- 
> service/network/dns/bind 9.16.33.0.0-11.4.50.0.1.126.2 --- 
> service/network/dns/bind 9.16.29.0.0-11.4.48.0.1.126.0 --- 
> service/network/dns/bind 9.11.37.0.0-11.4.45.0.1.119.0 --- 
> service/network/dns/bind 9.11.36.0.0-11.4.42.0.1.113.0 --- 
> ...
> 
> 
> It is possible to update from Solaris 11.4.45.0.1.119.0 to 11.4.55.0.1.138.1 
> and thereby skip 9.16 altogether.
> 
> Regards,
> 
> Stacey
> 
> * 9.18.11 uses OpenSSL v3
> 
> On 20 Apr 2023, at 17:26, Saleck wrote:
> 
> Hi,
> 
> we are currently running several bind 9.11 servers on Debian buster machines. 
> We would like to upgrade and wonder if we could skip version 9.16 altogether 
> or if it's a necessary middle step.
> 
> We have read both
> 
> https://kb.isc.org/docs/changes-to-be-aware-of-when-moving-from-911-to-916
> 
> and
> 
> https://kb.isc.org/docs/changes-to-be-aware-of-when-moving-from-bind-916-to-918
> 
> and it looks like there should be nothing that would break (we use only text 
> and raw zone file types) if we did the direct 9.11 to 9.18 upgrade. But 
> better be safe then sorry. Therefore we are seeking advice. ;)
> 
> If it's possible, can anyone confirm zone transfers from master to slave 
> would still work even if the servers ran different major versions? I know we 
> won't be able to use TLS until both servers would run 9.18 but would the 
> regular transfers still work?
> 
> It would help us a great deal if anyone could confirm this or (and) warn us 
> if there is something that we are missing in our assessment.
> 
> Kind regards,
> David Bruha
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