Chapter 1 Cisco 7200 VXR Product Overview
Cisco 7206VXR Overview
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Cisco 7200 VXR Installation and Configuration Guide
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Caution Do not mix power supplies in the Cisco 7206VXR. In dual power
supply router configurations, both power supplies must be of the
same type (two AC-input power supplies or two DC-input power
supplies).
Adjacent to the power supply bays are two chassis grounding receptacles that
provide a chassis ground connection for ESD equipment or a two-hole grounding
lug. (See Figure 1-4.)
Three internal fans draw cooling air into the chassis and across the internal
components to maintain an acceptable operating temperature. (See Figure 1-4.)
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, power supplies, and network processing engine
or network services engine slide into their respective chassis slots and connect
directly to the router’s midplane; there are no internal cables to connect. The
midplane distributes power from the power supplies to the I/O controller, port
adapters, 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.
The Cisco 7206VXR 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 telco rack. Steps for
installing the Cisco 7206VXR router in an equipment rack are the same for all
Cisco 7200 VXR routers and are explained in the chapter “Installing a Cisco 7200
VXR Router.” If you are not rack-mounting your Cisco 7206VXR, place it on a
sturdy tabletop or platform.
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