Rear View; System Board - Cisco 7301 Installation And Configuration Manual

Cisco 7301 Hardware Overview

Rear View

Figure 1-4
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Five internal fans draw cooling air into the chassis and across internal components to maintain an
acceptable operating temperature. (See
is the chassis grounding connector that provide a chassis ground connection for ESD equipment or a
two-hole grounding lug.

System Board

Internally, the system board contains the following components:
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Cisco 7301 Installation and Configuration Guide
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Cisco 7301—Rear View
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Fan
Two SODIMM DDR-SDRAM memory modules that are available in three options: 128 MB,
256 MB, and 512 MB
BCM 1250 processor system
BCM 1250 integrated dual processor that operates at an internal clock speed of 700 MHz. The
BCM 1250 processor maintains and executes the system management functions for the Cisco 7301
router. The processor also performs some memory and environmental monitoring functions.
The BCM 1250 serves as the system controller. It interconnects the processor with the double
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data rate synchronous dynamic random-access memory (DDR-SDRAM) controller, lightning
data transport (LDT) bus, and the three direct-interface Gigabit Ethernet interfaces, and the port
adapter PCI bus, which allows the port adapter access to DDR-SDRAM.
Cache memory
The processor system has two levels of cache: primary and secondary cache that are internal to the
microprocessor with secondary unified cache for data and instruction.
Three Gigabit Ethernet interfaces: (six ports: three SFP GBIC [optical] and three RJ-45s [copper]).
Any three ports are available at the same time and are linked directly to the BCM 1250 system.
A CompactFlash Disk for storing the default Cisco IOS software image.
Auxiliary port with full data terminal equipment (DTE) functionality.
Boot ROM for storing sufficient code for booting the Cisco IOS software.
Flash memory for storing the boot helper (boot loader) image.
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Figure 1-4.) The five fans are located at the rear of the chassis as
Chapter 1
Grounding connector
Cisco 7301 Overview
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