Logical interface scaling

On SRX Series devices, chassis cluster failover performance has been optimized to scale with more logical interfaces. During redundancy group failover, Generic Attribute Registration Protocol (GARP) is sent on each logical interface to steer the traffic to the appropriate node. GARP was sent by the Juniper Services Redundancy Protocol (jsrpd) process running in the Routing Engine in the previous release of Junos OS. With logical interface scaling, the Routing Engine becomes the checkpoint and GARP is directly sent from the Services Processing Unit (SPU) instead of the Routing Engine by flowd.