Protected System Domains

A Protected System Domain (PSD) is a redundant Routing Engine pair (or single Routing Engine) on the JCS1200 platform matched with one or more Flexible PIC Concentrators (FPCs) on a T Series router. In Figure 1, FPC1 and FPC2 and the Routing Engines in slots 1 and 2 belong to PSD1. In contrast, PSD2 is made up of the FPCs in slots 3 and 4 on the T Series router and the Routing Engines in slots 3 and 4 on the JCS1200 chassis.

Figure 1: Protected System Domain

Any number of FPCs can be assigned to a PSD. Only one redundant Routing Engine pair (or single Routing Engine) can be assigned to a PSD.

Note: When an FPC is not assigned to a PSD, it belongs to the Root System Domain (RSD) by default. A Physical Interface Card (PIC) on an FPC owned by the RSD can be configured as an interface that is shared by multiple PSDs. For more information, see Shared Interfaces .

You create each PSD under the RSD configuration through the Junos OS running on the Routing Engines on the T Series router. Once a PSD is configured, you access it as you would any separate physical router by connecting to the console port on the master Routing Engine on the JCS1200 chassis for the PSD you want to configure. Using the Junos OS, configure basis system properties, such as hostname, domain name, Ethernet management IP address, and so on. You can also download a configuration file to the PSD.

A PSD detects and manages only its own Routing Engines in the JCS1200 chassis and the assigned FPCs and PICs in the T Series router. In addition, failures on one PSD do not affect other PSDs.