EX8216 Core Switch

Kashif Latif

EX8216 Switch HardwareEX8216 Ethernet Switches provide:1. High Performance2. Scalable Connectivity3. Carrier-Class Reliability.

The EX8216 switch is a half-rack, midplane architecture, modular Ethernet switch that is designed for ultra high-density environments such as campus aggregation, data center, or high performance core switching environments.

Count…EX8216 switches provide high-availability and redundancy for all major hardware components, including Routing Engine (RE) modules, Switch Fabric (SF) modules, fan trays (with redundant fans), and load-sharing 2000 W AC, 3000 W AC, and 3000 W DC power supplies.

We can form an EX8200 Virtual Chassis by connecting individual EX8200 switches to an XRE200 External Routing Engine.

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A Virtual Chassis is multiple switches connected together that operate as a single network entity.

We can manage EX8216 switches using the same interfaces that you use for managing other devices running the same operating system—the command-line interface (CLI), the J-Web graphical interface, and the Network and Security Manager (NSM).

Component of EX8216 Core Switch

These are the some main component of EX8216 Core Switch:1. Software2. Chassis Physical Specifications, LCD

Panel, and Midplane3. Routing Engines and Switch Fabric4. Line Cards5. Cooling System6. Power Supplies

SoftwareThe Juniper Networks EX Series Ethernet Switches run Junos OS, which provides Layer 2 and Layer 3 switching, routing, and security services.

The same Junos OS code base that runs on EX Series switches also runs on all Juniper Networks J Series, M Series, MX Series, and T Series routers and SRX Series devices.

Chassis Physical Specifications, LCD Panel, and MidplaneEX8216 switches are designed to optimize rack space and cabling. The EX8216 switch is 21 rack units (21 U) in size (1/2 rack). Two EX8216 switches can fit in a standard 42 U rack.

Count…The EX8216 switch has a chassis-level LCD panel that displays Routing Engine and switch fabric status as well as chassis components’ alarm information for rapid problem identification. The LCD panel provides a user-friendly interface for performing initial switch configuration, rolling back a configuration, or restoring the switch to the factory default configuration. The EX8216 chassis midplane distributes the data, control, and management signals to system components and distributes power throughout the system.

Routing EnginesSystem management and system control functions of an EX8216 switch are performed by the Routing Engine (RE) module. An RE module contains a Routing Engine. The RE modules are hot-insertable and hot-removable field-replaceable units (FRUs) that are installed in the front of the chassis in the slots labeled RE0 and RE1.

A base configuration (AC version) EX8216 switch has one RE module. A redundant configuration (AC and DC versions) EX8216 switch has a second RE module for redundancy.

Switch FabricThe Switch Fabric (SF) modules provide the switching functionality to an EX8216 switch. The SF modules are hot-insertable and hot-removable FRUs. All eight SF modules are installed in the rear of the chassis in the slots labeled SF7 through SF0. In an EX8216 switch, all eight SF modules are active and must be installed in the switch for normal operation.

If a single SF module fails, the input/output traffic for that module is load-balanced among the remaining SF modules, providing graceful degradation in midplane performance.

Count…The impact of an SF module failure on the performance of an EX8216 switch varies based on the type of line cards installed in the switch and the traffic mix flowing through them. In an EX8216 switch configuration that is fully loaded with 8-port 10-Gigabit Ethernet SFP+ line cards, if one SF module fails, the remaining seven SF modules still have sufficient switching capacity to maintain continuous switch operation at full wire-rate performance.

The EX8216 switch can also be connected to an XRE200 External Routing Engine. An XRE200 External Routing Engine is used to connect multiple EX8200 switches into a Virtual Chassis.

Line CardsThe EX8216 switch features 16 horizontal line card slots and supports wire-rate performance for all packet sizes for the installed line cards. The line cards in EX8200 switches combine a Packet Forwarding Engine and Ethernet interfaces on a single assembly. They are FRUs, and you can install them in the slots labeled 0 through 15 on the front of the switch chassis. All line cards are hot-insertable and hot-removable.

Line Cards Description

Cooling SystemThe cooling system in an EX8216 switch consists of two hot-insertable and hot-removable FRU fan trays. Each fan tray contains nine fans. Both fan trays install vertically on the left front of the chassis and provide side-to-side chassis cooling and front-to-side cooling.

The top and bottom fan trays are identical and interchangeable. However, only the top fan tray cools the SF modules installed in the rear of the chassis.

Power SuppliesPower supplies for the EX8216 switch are fully redundant, load-sharing, and hot-insertable and hot-removable FRUs. Each EX8216 switch chassis can hold up to six AC or DC power supplies. The redundant AC configuration ships with six AC power supplies to provide the capacity to power the system using N+1 or N+N power redundancy.

The redundant DC configuration ships with four DC power supplies. The dual inputs of the DC supplies provide direct support for N+N power redundancy. The redundant configuration also provides sufficient capacity for N+1 redundancy in most configurations; if necessary, up to two additional DC supplies can be added to the system.

Thank You…!

Kashif Latif