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SRX3400 Services Gateway Midplane


The midplane in the SRX3400 Services Gateway is in the center of the chassis and provides connections for installing up to four common form-factor modules (CFMs) through the front of the chassis and up to three CFMs through the rear of the chassis. See Hardware Component Locations in the SRX3400 Services Gateway Chassis for details about where the individual modules can be installed. The power supplies install into the midplane from the rear of the chassis. The cooling system components also connect to the midplane.

The midplane performs the following major functions:

  • Data path—Data packets are transferred across the midplane between the IOCs and SPCs through the fabric ASICs on the SFBs.

  • Power distribution—The services gateway power supplies are connected to the midplane, which distributes power to all of the services gateway components.

  • Signal path—The midplane provides the signal path to the IOCs, SFBs, SPCs, Routing Engine, and other services gateway components for monitoring and control of the system.

Figure 1: Midplane