Cisco Systems 12006 series, 12406 series manual Nonredundant and Redundant System Configurations

Page 11

Chapter 1 Product Overview

Multigigabit Crossbar Switch Fabric

•System clock—The system clock synchronizes data transfers between line cards or between the RP and a line card, through the switch fabric. In systems with redundant CSCs, the two system clocks are synchronized so that if one system clock fails, the other clock takes over. The system clock signal is sent to all line cards, the RP, and switch fabric cards.

•Scheduler—The scheduler handles requests from the line cards for access to the switch fabric. When the scheduler receives a request from a line card for switch fabric access, the scheduler determines when to allow the line card access to the switch fabric.

•Switch fabric—The switch fabric carries the user traffic between line cards or between the RP and the line cards. The switch fabric card contains only the switch fabric circuitry and receives scheduling information and system clock information from the CSC.

The SFC contains only the switch fabric circuitry, which carries user traffic between line cards or between the RP and the line cards. The SFC receives scheduling information and the system clock sent from the CSC.

Nonredundant and Redundant System Configurations

Cisco 12006 and Cisco 12406 routers are available in two system configurations:

1.Nonredundant configuration that includes one CSC and one power supply.

When you order a Cisco 12006 or Cisco 12406 Router, the nonredundant configuration is shipped by default.

2.Redundant configuration that includes two CSCs and two power supplies.

For the redundant configuration, EMI compliance and cooling requirements are met by having two CSCs and two power supplies installed in the system.

For the nonredundant configuration, EMI compliance and cooling requirements are met only when blank fillers are installed in place of either (or both) the second (unused) CSC slot or the second (unused) power supply bay.

Note When operating your router with a single CSC, the second CSC slot must have a CSC blank filler (MAS-GSR6-CSCBLNK=) installed to ensure EMI compliance.

 

 

Cisco 12006 and Cisco 12406 Router Installation and Configuration Guide

 

 

 

 

 

 

OL-11497-03

 

 

1-11

 

 

 

Page 10 Page 12
Image 11
Page 10 Page 12
Contents Introduction Product OverviewProduct Description Cisco 12006 and Cisco 12406 router Front View Product Overview Product Description Product Overview Product Description Cisco 12006 and Cisco 12406 router Rear View RP and Line Card Slots Physical and Functional DescriptionChassis Chassis Backplane Switch Fabric Card SlotsAlarm Card Slots Cooling PowerSwitch Fabric Card Types Multigigabit Crossbar Switch FabricNonredundant and Redundant System Configurations Switch Fabric Redundancy Switch Fabric Switching Capacity and Router TypeDevice Discovery Maintenance BusPower-Up/Down Control Code Download DiagnosticsEnvironmental Monitoring and Alarms Route Processor Functions Route ProcessorsGigabit Route Processor Route Processor TypesProduct Overview Route Processors GRP Layout Type Size Quantity Description Location GRP Memory ComponentsSram System Status LEDs Reset AUX Coll RX Link MIIGRP Alphanumeric LED Displays Partial Faceplate Soft Reset SwitchAsynchronous Serial Ports Pcmcia SlotsEthernet Port Performance Route Processor Front View Performance Route ProcessorProduct Overview Route Processors PRP Horizontal Orientation Sdram PRP Memory ComponentsSdram Flash Disk Size Product Number Soft Reset Switch Ethernet Ports Flash Disk SlotsLine Cards 10 Sample Line Cards Alarm Alarm CardsAlarm Card Status Alarm Output FunctionClock and Scheduler Card and Switch Fabric Card Status Alarm Relay Contact Connector Power SubsystemsPower Source Monitoring AC PDU AC Power Subsystem12 AC Power Distribution Unit 13 AC-Input Power Supply AC-Input Power SupplyProduct Overview Power Subsystems LED Label Function State Description DC Power Subsystem14 DC Power Distribution Unit DC-Input Power Entry Module Power a16 DC-Input Power Entry Module LED Label Color Function Blower Module Power DistributionTop view 18 Air Filter Locations Air FiltersCable-Management System 19 Chassis Cable-Management System Field-Replaceable Units Technical Specifications
Top Page Image Contents