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Unified ISSU JUNOS Software Release Support

In order to perform a unified ISSU, your router must be running a JUNOS software release that is ISSU capable for the specific platform. See Unified ISSU Platform Support. You can use unified ISSU to upgrade from an ISSU-capable software release to a newer software release. To downgrade from an ISSU-capable release to a previous software release (ISSU-capable or not), use the request system add command. See the JUNOS Software Installation and Upgrade Guide for details.

Note: Unified ISSU does not support extension application packages developed using the Juniper Partner Solution Development Platform (PSDP) SDK.

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