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Unified ISSU Protocol Support

Unified ISSU is dependent on nonstop active routing. Table 14 lists the protocols that are supported during a unified ISSU.

Table 14: Unified ISSU Protocol Support

Protocol	Software Release
Border Gateway Protocol (BGP), except for BGP VPN services	JUNOS 9.0 or later
Intermediate System-to-Intermediate System (IS-IS)	JUNOS 9.0 or later
Label Distribution Protocol (LDP)	JUNOS 9.0 or later
LDP-based virtual private LAN service (VPLS)	JUNOS 9.3 or later
Layer 2 circuits	JUNOS 9.2 or later
Layer 3 VPNs using LDP	JUNOS 9.2 or later
Link Aggregation Control Protocol (LACP) on MX-series Ethernet Services routers.	JUNOS 9.4 or later
Open Shortest Path First (OSPF)/OSPFv3	JUNOS 9.0 or later
Protocol Independent Multicast (PIM)	JUNOS 9.3 or later

Note: For routing protocols using bidirectional forwarding detection (BFD), when a Routing Engine switchover occurs, the BFD session state is not saved.

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