Unified ISSU Feature Support

Unified ISSU supports most JUNOS software features in JUNOS Release 9.0. However, the following constraints apply:

• Link Aggregation Control Protocol (LACP)—Link changes are not processed until after the unified ISSU is complete.
• Automatic Protection Switching (APS)—Network changes are not processed until after the unified ISSU is complete.
• Ethernet Operation, Administration, and Management (OAM) as defined by IEEE 802.3ah and by IEEE 802.1ag—When a Routing Engine switchover occurs, the OAM hello times out, triggering protocol convergence.
• Ethernet circuit cross-connect (CCC) encapsulation—Circuit changes are not processed until after the unified ISSU is complete.
• Logical Systems—Logical system configurations are not supported by unified ISSU.