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• Root System Domains  

• Related Topics
• JCS 1200 Chassis and T-series Routers As a Single Platform
• Protected System Domains
• Shared Interfaces
• Connections Between JCS 1200 and T-series Chassis
• Benefits of JCS 1200 and T-series As a Single Platform

Root System Domains

The Root System Domain (RSD) is the JUNOS software running on a pair of redundant Routing Engines on a T-series routing platform connected to the switch fabric on the JCS 1200 platform. The configuration on these Routing Engines provides:

• The RSD identifier
• The parameters used to create Protected System Domains (PSDs) under the RSD, namely:
  • Which Routing Engine or redundant Routing Engine pair on the JCS 1200 platform is assigned to the PSD.
  • Which Flexible PIC Concentrator (FPC) or FPCs on the T-series routing platform are assigned to the PSD.

Because you can connect up to three T-series routing platforms to the JCS 1200 chassis, you can configure up to three RSDs. The PSD identifiers must be unique for each RSD. That is, PSD1 can only belong to RSD1, and not to RSD2 or RSD3.