To create a chassis cluster with SRX-series services gateways, you must physically connect a pair of the same kind of supported Juniper Networks services gateways back-to-back over a pair of Gigabit Ethernet connections or a pair of 10 Gigabit Ethernet connections. The connection that serves as the control link must be the built-in controller port on each device. The fabric link connection can be a combination of any pair of Gigabit Ethernet interfaces on the routers. Figure 67 shows two services gateways connected using the built-in interfaces for both the fabric and control links.
Figure 67: Connecting SRX-series 5800 Services Gateways in a Cluster
