Before looking at how or when to upgrade, we need to talk a bit about the naming conventions used to identify a JUNOS software package.
Most commercially available JUNOS software packages follow a naming convention based on the following model:
In this model:
Identifies the type of package and platform family to which
the JUNOS software applies. The software has two major categories
jbundle comprises just the
JUNOS components, while
jinstall contains the JUNOS components as well as a
revised FreeBSD. The
jbundle packages are
provided in platform-specific variations, as shown in Table 6-1.
Represents the software major release number.
Indicates the type of software release. In most cases, it is an R, to indicate that this is released software. While not appropriate for a high availability network, alpha and beta software is made available to some customers for testing purposes. Such software is tagged with an A (for alpha-level software), B (for beta-level software), or I (for internal, test, or experimental versions of software) in the Z position.
Describes the incremental release of the major revision or the internal build number for non-R releases.
Identifies the software package as being suitable for a worldwide audience (marked as export) or as being suitable for a domestic audience. This distinction is ...