XRE200 System Overview
XRE200 External Routing Engine Hardware Overview
The XRE200 External Routing Engine (model number: EX-XRE200) is used to create a Virtual Chassis composed of Juniper Networks EX8200 Ethernet Switches. A Virtual Chassis is multiple switches connected together that operate as a single network entity. The advantages of connecting multiple EX8200 switches into a Virtual Chassis include better-managed bandwidth at a network layer, simplified configuration and maintenance because multiple devices can be managed as a single device, and a simplified Layer 2 network topology that minimizes or eliminates the need for loop prevention protocols such as Spanning Tree Protocol (STP).
An EX8200 Virtual Chassis supports up to two external Routing Engines and up to four EX8200 switches. A second XRE200 External Routing Engine can be added to the Virtual Chassis configuration to provide external Routing Engine redundancy. Juniper Networks EX8208 and EX8216 Ethernet Switches can be part of the same EX8200 Virtual Chassis.
Benefits of the XRE200 External Routing Engine
Enables configuring of EX8200 switches in a Virtual Chassis—The XRE200 External Routing Engine enables you to configure EX8200 switches in a Virtual Chassis and manage and operate them as a single network entity.
You connect Virtual Chassis ports (VCPs) on an XRE200 External Routing Engine to the management (labeled MGMT) ports on the internal Routing Engines of EX8200 switches to form an EX8200 Virtual Chassis. The Virtual Chassis is formed automatically when these connections are established.
All devices in an EX8200 Virtual Chassis run the Juniper Networks Junos operating system (Junos OS). The same Junos OS code base that runs on the devices in the EX8200 Virtual Chassis also runs on many other Juniper products, including all EX Series switches, the Juniper Networks J Series, M Series, MX Series, and T Series routers, and SRX Series Services Gateways.
In an EX8200 Virtual Chassis, most Routing Engine tasks for all switches in the Virtual Chassis run on the XRE200 External Routing Engine. The internal Routing Engines continue to be responsible for functions local to their own switches, such as environmental monitoring, system loading, and power management. The internal Routing Engines communicate with the external Routing Engine by using the Virtual Chassis Control Protocol (VCCP).
You must configure all switches and external Routing Engines that will be part of the same EX8200 Virtual Chassis to run the same version of Junos OS before connecting the devices into a Virtual Chassis.
After you connect an EX8200 Virtual Chassis, all switches and external Routing Engines that are part of the Virtual Chassis should be upgraded simultaneously.
An EX8200 Virtual Chassis supports a subset of the software features available for the EX8200 switch. For a list of software features available on an EX8200 Virtual Chassis, see EX Series Virtual Chassis Software Features Overview.
The XRE200 External Routing Engine is a 2 rack unit (2 U) Routing Engine. See Figure 1.
The XRE200 External Routing Engine has an LCD panel that provides hardware status information. The LCD panel displays a variety of information about the external Routing Engine and, if your external Routing Engine is running Junos OS Release 12.1 or later, provides menu options to perform basic operations such as initial configuration and external Routing Engine reboot. See LCD Panel in an XRE200 External Routing Engine.
Virtual Chassis Control Interface Modules
The XRE200 External Routing Engine supports up to two Virtual Chassis Control Interface (VCCI) modules. Each VCCI module contains either four 10/100/1000BASE-T Gigabit Ethernet VCPs with RJ-45 connectors or four 1000BASE-X Gigabit Ethernet VCPs with small form-factor pluggable (SFP) connections. A second VCCI module is required if you are using the recommended redundant XRE200 External Routing Engine configuration and connecting five or more EX8200 switches into a Virtual Chassis.
The RJ-45 VCPs connect to the management (MGMT) ports on the internal Routing Engines of the EX8200 member switches to form an EX8200 Virtual Chassis. The VCPs on the RJ-45 VCCI modules can also be used to connect external Routing Engines together to provide a connection between a primary and a backup external Routing Engine.
The SFP VCPs are used to connect two XRE200 External Routing Engines together over a long distance in the same EX8200 Virtual Chassis. You can use the SFP ports to connect XRE200 External Routing Engines over distances up to 43.5 miles (70 km). You can also use the SFP VCPs to connect an XRE200 External Routing Engine to an EX8200 switch within a Virtual Chassis only if an intermediary switch is used. The intermediary switch is required because the management (MGMT) port on the Routing Engine (RE) modules or Switch Fabric and Routing Engine (SRE) modules of an EX8200 switch do not support SFP connections.
VCCI modules are installed in the VCCI module slots on the XRE200 External Routing Engines. Both VCCI module slots support RJ-45 and SFP VCCI modules. RJ-45 and SFP VCCI modules can be installed simultaneously. In configurations using one RJ-45 and one SFP VCCI module, either VCCI module can be installed in either VCCI module slot. All XRE200 External Routing Engines are shipped with one preinstalled RJ-45 VCCI module. VCCI modules are field-replaceable units (FRUs). See Installing a VCCI Module in an XRE200 External Routing Engine.
Hard Disk Drive Modules
The XRE200 External Routing Engine ships with two 160 GB hard disk drive (HDD) modules that provide storage for the EX8200 Virtual Chassis. The HDD modules provide a fully redundant storage system on the external Routing Engine; all directories and files saved on one HDD module are also saved on the other HDD module. The HDD modules are installed in the HDD module slots.
HDD modules are hot-removable and hot-insertable FRUs. See Installing an HDD Module in an XRE200 External Routing Engine.
The XRE200 External Routing Engine ships with redundant AC or DC power supplies that provide power for the external Routing Engine. The power supply slots are located on the far right side of the rear panel of the external Routing Engine.
AC and DC power supplies are hot-removable and hot-insertable FRUs. See Installing an AC or DC Power Supply in an XRE200 External Routing Engine.
The XRE200 External Routing Engine ships with two fan modules. The fan modules provide cooling to the system and are installed in the fan module slots on the rear panel of the XRE200 External Routing Engine.
Fan modules are hot-removable and hot-insertable FRUs. See Installing a Fan Module in an XRE200 External Routing Engine.
XRE200 External Routing Engine Hardware Configurations
All power supplies, fan modules, HDD modules, and VCCI modules are field-replaceable units (FRUs) and can be ordered separately.
Table 1 shows the typical hardware configurations for an XRE200 External Routing Engine and the components included in the configurations.
Table 1: XRE200 External Routing Engine Hardware Configurations
External Routing Engine Configuration
Base shipping configuration
Five or more member switch configuration
Optical VCCI module configuration
Chassis Physical Specifications for an XRE200 External Routing Engine
The XRE200 External Routing Engine is an external Routing Engine used to connect multiple EX8200 switches into a single Virtual Chassis. See Figure 2.
Table 2 summarizes the physical specifications of the XRE200 External Routing Engine.
Table 2: Physical Specifications of the XRE200 External Routing Engine
3.5 in. (8.9 cm)
17.26 in. (43.8 cm)
17.72 in. (45 cm)
Dual power supply configuration (shipping configuration): 27 lb (12.2 kg)
You can mount an XRE200 External Routing Engine on 2 rack units (2 U) of a standard 19-in. rack. An XRE200 External Routine Engine supports two-post and four-post rack mounting. A four-post rack mount kit is shipped with all XRE200 External Routing Engines.
Field-Replaceable Units for an XRE200 External Routing Engine
Field-replaceable units (FRUs) are external Routing Engine components that you can replace at your site. The external Routing Engine uses these types of FRUs:
Hot-insertable and hot-removable—You can remove and replace these components without powering off the external Routing Engine or disrupting the external Routing Engine function.
Offline field-replaceable—You can replace these components, but the external Routing Engine must be powered off to replace the component.
Table 3 lists the FRUs for the external Routing Engines and their types.
Table 3: FRUs in an XRE200 External Routing Engine
Hot-insertable and hot-removable.
Hot-insertable and hot-removable.
Hard Disk Drive (HDD) module
Hot-insertable and hot-removable.
Caution: When an XRE200 External Routing Engine is powered on, always leave at least one HDD module installed in the HDD module slot. Removing both HDD modules can cause severe hardware issues for the external Routing Engine when the external Routing Engine is powered on.
If you need to remove both HDD modules, power off the external Routing Engine before removing the HDD modules.
Virtual Chassis Control Interface (VCCI) modules
If you have a Juniper J-Care service contract, register any addition, change, or upgrade of hardware components at https://www.juniper.net/customers/support/tools/updateinstallbase/ . Failure to do so can result in significant delays if you need replacement parts. This note does not apply if you replace existing components with the same type of component.