Switch Fabric and Routing Engine (SRE) Module in an EX6200 Switch

The Switch Fabric and Routing Engine (SRE) module performs switching and system management functions in an EX6200 switch. It also provides uplink connectivity through four 10-gigabit SFP+ uplink ports. See Figure 1.

You can install one or two SRE modules in an EX6200 switch. A non-redundant EX6210 switch configuration has only one SRE module. You can add a second SRE module to the configuration for Routing Engine and switch control redundancy. See Understanding EX6210 Switch Component and Functionality Redundancy.

The SRE modules install horizontally into the front of the chassis in slots labeled 4 and 5.

Figure 1: SRE Module in an EX6200 Switch

Note: We recommend that you install two SRE modules for redundancy. If you install only one SRE module, we recommend that you install it in slot 4. See Slot Numbering for an EX6210 Switch.

If two SRE modules are installed, one functions as the master and the other acts as the backup. If the master SRE module fails or is removed, the backup takes over as the master. The switch fabric circuitry on the backup SRE module is active; this allows the ports on the switch to operate at wire speed. You can also use the uplink ports on the backup SRE module.

If two SRE modules are installed, the master and backup SRE modules are hot-pluggable. If only one SRE module is installed, you must halt the SRE module before removing it. See Taking the SRE Module Offline in an EX6200 Switch.

Each SRE module provides 64 Gbps of full duplex bandwidth per line card slot. If only one SRE module is installed in a chassis, it supports 384 ports on eight line cards with 3:2 oversubscription. If two SRE modules are installed in a chassis, they provide 128 Gbps of full duplex bandwidth to each line card slot, allowing all 384 ports to operate at wire speed.

The SRE module provides these functions:

• Provides full fabric connectivity to all line cards installed in the chassis
• Powers the line cards on and off
• Controls system resets and boot sequence for the switch
• Monitors and controls the fan speed, power status for various chassis components, LCD panel and chassis status LEDs
• Provides uplink connectivity

The SRE module has these components:

• Four uplink ports—Four 10-gigabit Ethernet SFP+ uplink ports. The ports are labeled from left to right, 0 through 3. Since the switch fabric circuitry on the backup SRE module is active, you can use the four uplink ports on the backup SRE module for uplink connectivity.
• Two management ports—A Gigabit Ethernet SFP management port and a 10/100/1000 BASE-T copper management port. The management ports can be used to connect the SRE module to a management LAN for out-of-band management. See Connecting an EX Series Switch to a Network for Out-of-Band Management.

  Note: Only one of the two management ports can be used for out-of-band management at any given time. If an SFP transceiver is plugged into the SFP management port, the copper management port is disabled.

• Console port—Connects the SRE module to a system console through a cable with an RJ-45 connector. See Connecting an EX Series Switch to a Management Console.
• USB port—Provides an interface through which you can install the Junos OS or a configuration file manually. See USB Port Specifications for an EX Series Switch.
• Recessed reset button—Power cycles the SRE module when pressed.

  Take the SRE module offline using the CLI before pressing the reset button. See Taking the SRE Module Offline in an EX6200 Switch.

• LCD Panel—Displays status information for the switch. See LCD Panel in an EX6200 Switch.
• Chassis Status LEDs—Indicate SRE module status and system status. See Chassis Status LEDs in an EX6200 Switch.
• Ejector levers—Used for installing and removing the SRE module.
• Captive screws—Secure the SRE module in place.