Cisco 7200 VXR - Manual (Page 7)

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Cisco 7200 VXR Installation and Configuration Guide
OL-5013-09
Chapter 1 Cisco 7200 VXR Product Overview
Cisco 7206VXR Overview
Three internal fans draw cooling air into the chassis and across internal components to maintain an
acceptable operating temperature. (See
Figure 1-2 .) The three fans are enclosed in a tray that is located
inside the chassis.
Caution To ensure the proper flow of cooling air across the internal components, make sure blank port adapters
are installed in unoccupied port adapter slots, and power supply filler plates are installed in unoccupied
power supply bays.
The I/O controller, port adapters, Port Adapter Jacket Card, power supplies, and network processing
engine or network services engine slide into their respective chassis slots and connect directly to the
routers midplane; there are no internal cables to connect. The midplane distributes power from the power
supplies to the I/O controller, port adapters, Port Adapter Jacket Card, fan tray, and network processing
engine or network services engine.
The midplane also senses OIR of the port adapters, bridges the PCI buses from the port adapters to
packet memory on the network processing engine or network services engine, arbitrates traffic across
the PCI buses, and generates the clock signals for the port adapters on each PCI bus.
Note The Port Adapter Jacket Card does not support OIR. However, the port adapter installed in the Port
Adapter Jacket Card does support OIR.
The Cisco 7204VXR operates as either a tabletop or a rack-mounted unit. A rack-mount kit is standard
equipment included with all Cisco 7200 VXR routers when they are shipped from the factory. The kit
provides the hardware needed to mount the router in a standard 19-inch equipment rack or a 2-post rack.
Steps for installing the Cisco 7204VXR router in an equipment rack are the same for all Cisco 7200
VXR routers and are explained in Chapter 3, “
Installing a Cisco 7200 VXR Router .” If you are not
rack-mounting your Cisco 7204VXR, place it on a sturdy tabletop or platform.
A fully configured Cisco 7204VXR, with two installed power supplies and all chassis slots filled, weighs
approximately 50 pounds (22.7 kilograms [kg]). For clearance requirements and rack-mount installation
considerations, see
Chapter 2, “Preparing for Installation,” the “Site Requirement Guidelines” section
on page 2-3 .
Cisco 7206VXR Overview
The Cisco 7206VXR supports multiprotocol, multimedia routing and bridging with a wide variety of
protocols and port adapter combinations available for Cisco 7200 series routers. In addition, the
Cisco 7206VXR midplane provides increased support for multiple high-bandwidth port adapters.
Note The Cisco 7206VXR is also available as a router shelf in a Cisco AS5800 Universal Access Server. If
your Cisco 7206VXR is installed as a router shelf, use this publication in conjunction with the
Cisco AS5800 Universal Access Server publications that shipped with the access server.
The Cisco 7206VXR has six slots (slot 1 through slot 6) for port adapters, one slot for an input/output
(I/O) controller, and one slot for a network processing engine or network services engine. You can place
the port adapters in any of the six available slots.
The front of the Cisco 7206VXR provides access to the I/O controller and up to six network interface
port adapters. (See
Figure 1-3 .)