Juniper SRX5K-SCBE Enhanced Switch Control Board with SRX5K-RE-1800X4-B

Here is the comprehensive technical overview and specifications manual for the combined Juniper Networks SRX5K-SCBE switch control board and its integrated SRX5K-RE-1800X4-BQ routing engine subsystem.

Architectural Systems Overview

This combined unit represents the central core subsystem (Control Plane + Switching Fabric) for Juniper Networks SRX5000 Series Services Gateways (specifically the SRX5400, SRX5600, and SRX5800 firewalls).

The hardware assembly consists of two distinct components paired together into a single master blade slot configuration:

1. SRX5K-SCBE (Enhanced Switch Control Board): The primary hardware backplane fabric that interconnects all line cards (IOCs) and service cards (SPCs) across the firewall chassis.

2. SRX5K-RE-1800X4-BQ (Routing Engine Sub-Module): The dedicated computing brain that slides directly into the SCBE host carrier, running Juniper Junos OS to control network configurations, routing tables, and systemic operations.

   Technical Specifications Matrix

   1. Host Board: SRX5K-SCBE (Enhanced SCB)

   The Enhanced Switch Control Board provides significantly increased fabric bandwidth per slot compared to legacy standard SCBs, which is necessary to support high-density 100GbE and 40GbE interfaces.

   Feature	Specification
   Model Name	SRX5K-SCBE
   Hardware Classification	Enhanced Switch Control Board
   Fabric Interconnect Rate	Up to 240 Gbps per slot throughput capability
   Chassis Slot Allocation	Dedicated SCB slots (varies by physical chassis footprint)
   Sub-Module Support	Features 1 integrated slot to carry an RE-1800X4 routing engine
   Redundancy Support	Active/Active or Active/Standby fabric crossbars (depending on total chassis SCB populating)

   2. Control Brain: SRX5K-RE-1800X4-BQ (Routing Engine)

   The RE-1800X4 series utilizes a powerful quad-core processor environment designed to maximize policy compilation speeds and manage immense routing tables without bottlenecking.

   Feature	Specification
   Model Name	SRX5K-RE-1800X4-BQ
   Processor Type	Intel Quad-Core Core i7 Processor (Running at 2.0 GHz per core)
   System Memory (RAM)	16 GB DDR3 RAM
   Primary Storage Drive	2 x 50 GB solid-state drives (SSD) arranged in a default RAID-1 mirror configuration
   Management Interfaces	1 x 10/100/1000Mbps RJ45 Management Port, 1 x Console Port, 1 x Auxiliary Port, 2 x USB Ports

   Key Performance Capabilities

   • High-Speed Switching Fabric Linkage: The SCBE handles internal data routing paths between Input/Output Cards (IOCs) and Services Processing Cards (SPCs) seamlessly over the passive chassis backplane.

   • Storage Redundancy via Dual SSDs: The RE-1800X4 features dual embedded SSD drives running a hardware/software mirrored array. If one drive encounters data sectors failures or operational faults, the backup drive takes over instantly without dropping the system offline.

   • Synchronous Clock Distribution: The SCBE controls the distribution of reference clock timing markers across line cards, maintaining chassis-wide synchronization required for strict frame prioritization and high-availability clustering.

   • Centralized System Management: Manages power sequencing, chassis thermal monitoring fans, component alarms, and systemic Junos software boot routines.

   Chassis Slot Guidelines & Requirements

   • SRX5400: Typically occupies a dedicated slot at the lower section of the horizontal front-loading cluster.

   • SRX5600: Slotted vertically in slots labeled SCB0 and SCB1.

   • SRX5800: Requires vertical alignment in slots 6 and 7 (with a third slot optional for complete $2+1$ structural crossbar optimization).

   Technical Dependency Note: To utilize the full throughput potentials offered by the SRX5K-SCBE, the firewall chassis must also be loaded with modern Enhanced Midplanes (SRX5400-CHAS, SRX5600-CHAS-BB-E, or SRX5800-CHAS-BB-E). Running this module on legacy, non-enhanced chassis backplanes will limit the maximum bus line speeds to legacy throughput standards.