[j-nsp] Understanding versioning of service and regular releases

[Tore Anderson]

On 2011-05-27, JUNOS 11.1S2 was released for the EX. So this release is
a couple of weeks newer than JUNOS 11.1R2.3. However,
<https://www.juniper.net/customers/csc/software/junos_software_versions.jsp>
says 11.1R2.3 is the recommended version for the EX 4500 in VC
configurations.

I'm a bit confused on how to interpret the version numbers of the
service releases. Should I consider junos_software_versions.jsp as the
accurate source of information (in other words that 11.1S2 is a
back-port of fixes alrady found 11.1R2.3 to the 11.1R1 branch), like so,
in incremental order of preference:

1) 11.1R1.10
2) 11.1S1 (i.e. 11.1R1.10 + critical fixes)
3) 11.1S2 (i.e. 11.1S1 + more critical fixes)
4) 11.1R2.3

Or, is the page outdated and the release dates is the thing I should
look at when determining which version to use:

1) 11.1R1.10
2) 11.1S1 (i.e. 11.1R1.10 + critical fixes)
3) 11.1R2.3
4) 11.1S2 (i.e. 11.1R2.3 + critical fixes)

BR,
-- 
Tore Anderson
Redpill Linpro AS - http://www.redpill-linpro.com
Tel: +47 21 54 41 27