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If the router is running a software version previous to JUNOS Release 7.2R3 or 7.3R2, you might need to upgrade to one of these interim software releases before you can upgrade to JUNOS Release 7.4R4. |
All junos-jseries software is delivered in signed packages that contain digital signatures. A package is installed only if the digital signature within it matches the signature recorded in its corresponding .sig file. (For example, -export.tgz contains -export.tgz and -export.tgz.sig. The junos-jseries-release-export.tgz package is installed only if the digital signatures match in the two -export.tgz.sig files.)
The junos-jseries package completely reinstalls the software. This package rebuilds the file system but retains configuration files and similar information from the previous version.
For more information, see the J-series Services Router Administration Guide.
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If the router is running a software version previous to JUNOS Release 7.2R3 or 7.3R2, you might need to upgrade to one of these interim software releases before you can upgrade to JUNOS Release 7.4R4. |