Cisco 12012 Installation and Configuration Guide
Product Overview
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Product Overview

Table Of Contents

Product Overview

Physical and Functional Overviews

Gigabit Route Processor

GRP Memory Components

System Status LEDs

Soft Reset Switch

PCMCIA Slots

Asynchronous Serial Ports

Ethernet Port

Performance Route Processor

PRP Memory Components

System Status LEDs

Soft Reset Switch

Flash Disk Slots

Asynchronous Serial Ports

Ethernet Ports

Line Cards

Alarm Card

Switch Fabric

Power Supplies

AC-Input Power Supply

DC-Input power Supply

Power Distribution

Blower Module

Air Filter

Cable-Management System

Maintenance Bus

System Specifications

Agency Approvals


Product Overview


This chapter provides physical and functional overviews of the Cisco 12012 Gigabit Switch Router (GSR). It contains physical descriptions of the router hardware and major components, and functional descriptions of the hardware-related features.

The Cisco 12012 is a member of the Cisco 12000 series of gigabit switch routers. The Cisco 12012 is aimed at scaling the Internet and enterprise backbones to speeds of OC-3/STM-1 (155 Mbps), OC-12/STM-4 (622 Mbps), and OC-48/STM-16 (2.4 Gbps). The Cisco 12012 is built around a high-speed switching fabric that is scalable from 5 to 60 Gbps, providing high-performance to support IP-based local and wide-area networks (WANs).

The Cisco 12012 has two separate card cages; the upper card cage and the lower card cage. The upper card cage has 12 user-configurable slots that support a combination of line cards and a Route Processor (RP). The rightmost slot in the upper card cage supports a non-configurable alarm card. Network interfaces reside on line cards that provide connection between the router's switch fabric and the external networks.

The lower card cage has five slots for the cards containing the switch fabric: clock and scheduler cards (CSCs) and switch fabric cards (SFCs). The lower card cage is keyed; the top two slots accept clock and scheduler cards, and the lower three slots accept switch fabric cards.

You can configure the Cisco 12012 for either source AC operation or source DC operation. AC-input or DC-input power supplies reside in a power supply bay located near the bottom of the frame.


Note   The Cisco 12012 does not support a mixture of AC- and DC-input power supplies.



Warning   

AC operation requires a minimum configuration of two AC-input power supplies.


Two blower modules, one mounted at the top of the frame and one mounted at the bottom of the frame, provide cooling air to the system.

Physical and Functional Overviews

The Cisco 12012 is a modular system consisting of the following components (see ):

Frame—a rigid metal structure that is 19-inches (48.3-cm) wide, 21-inches (53.3-cm) deep, and 56-inches (142.2-cm) high and weighs 75 lb (34 kg) empty. Three sets of rails in the frame support the other three major components: a card cage assembly and two blower modules. The frame mounts into either a telco-style or four-post rack that is secured to the building structure.

Card cage assembly—a sheet metal enclosure that mounts in the frame. The card cage assembly consists of the upper card cage, the lower card cage, and the power supply bay. All three components are tied together electrically through a passive system backplane in the back of the card cage assembly. The upper card cage has 12 vertical slots for line cards and an RP. A unique slot (rightmost slot) in the upper card cage supports an alarm card. The lower card cage has five horizontal slots for the switch fabric. A removable air filter in a hinged air filter tray is mounted in front of the lower card cage. The power supply bay is at the bottom of the card cage assembly; it has slots for up to four AC-input power supplies or up to two DC-input power supplies.

Blower modules—two identical blower modules that slide on rails into the top and bottom of the frame. They provide cooling air for all of the components in the card cage.

Figure 1-1 Cisco 12012 (Front View, AC-Input Power Supplies Shown)

The front of the Cisco 12012 provides access to all system components, making the system easy to service. All its major components are field-replaceable units (FRUs), including the following:

Gigabit Route Processor (GRP) or Performance Route Processor (PRP)

Line cards

Clock and scheduler cards

Switch fabric cards

Alarm card

Power supplies

Blower modules

The following sections provide brief overviews of each FRU. Chapter 7, "Maintaining the Cisco 12012," and separate documents called configuration notes contain instructions for removing and replacing FRUs.

For information on ordering FRUs, contact a customer service representative.

Gigabit Route Processor

Each Cisco 12012 GSR has one main system (or route) processor. The route processor (RP) processes the network routing protocols and distributes updates to the Cisco Express Forwarding (CEF) tables on the line cards. The RP also performs general maintenance functions, such as diagnostics, console support, and line card monitoring.

Two types of RPs are available for the Cisco 12012 GSR:

Gigabit Route Processor (GRP)

Performance Route Processor (PRP)

When not explicitly specified, this document uses the term route processor (RP) to indicate either the GRP or the PRP.


Note   If you install a second, redundant RP, it must be of the same type as the primary RP.


This section provides information about the Gigabit Route Processor (GRP) (see ) and its use as the main system processor for the Cisco 12012.

This section provides information on the following GRP functionality:

Memory components

System status LEDs

Soft reset switch

PCMCIA slots

Asynchronous serial ports

Ethernet port

If you have a PRP, see the "Performance Route Processor" section.

Figure 1-2 Gigabit Route Processor (Front Panel View, Horizontal Orientation Shown)

The primary functions of the GRP are as follows:

Downloading the Cisco IOS software to all of the installed line cards at power up

Providing a console (terminal) port for router configuration

Providing an auxiliary port for other external equipment (such as modems)

Providing an IEEE 802.3, 10/100-megabits-per-second (Mbps) Ethernet port for Telnet functionality

Running routing protocols

Building and distributing routing tables to line cards

Providing general system maintenance functions

The GRP communicates with the line cards either through the switch fabric or through a maintenance bus (MBus). The switch fabric connection is the main data path for routing table distribution as well as for packets that are sent between the line cards and the GRP. The MBus connection allows the GRP to download a system bootstrap image, collect or load diagnostic information, and perform general, internal system maintenance operations. The GRP plugs into any slot in the upper card cage in the Cisco 12012 except the rightmost slot, which is reserved for the alarm card.

The GRP contains the following components:

IDT R5000 Reduced Instruction Set Computing (RISC) processor used for the CPU. The CPU runs at an external bus clock speed of 100 MHz and an internal clock speed of 200 MHz.

Up to 256 megabytes (MB) of parity-protected, extended data output (EDO) dynamic random-access memory (DRAM) on two, 60-nanosecond (ns), dual in-line memory modules (DIMMs); 64 MB of DRAM is the minimum shipping configuration.

512 kilobytes (KB) of static random-access memory (SRAM) for secondary CPU cache memory functions (SRAM is not user configurable or field upgradeable).

512 KB of NVRAM (NVRAM is not user configurable or field upgradeable).

Most of the additional memory components used by the system, including onboard Flash memory (8-MB) and up to two PCMCIA-based Flash memory cards. The default GRP PCMCIA Flash memory is 20 megabytes (MB).

Air-temperature sensors for environmental monitoring.

The Cisco IOS software images that run the Cisco 12012 reside in Flash memory, which is located on the GRP in the form of a single in-line memory module (SIMM), and on up to two Personal Computer Memory Card International Association (PCMCIA) cards (called Flash memory cards) that insert in the two PCMCIA slots (slot 0 and slot 1) on the front of the GRP. (See .) Storing the Cisco IOS images in Flash memory enables you to download and boot from upgraded Cisco IOS images remotely or from software images resident in GRP Flash memory.

The Cisco 12012 supports downloadable system software for most Cisco IOS software upgrades, which enables you to remotely download, store, and boot from a new Cisco IOS image.

GRP Memory Components

lists the memory components on the GRP. shows the location of the DRAM and Flash SIMM on the GRP.

Table 1-1 GRP Memory Components

Type
Size
Quantity
Description

DRAM

641 to 256 MB

1 or 2

64- or 128-MB DIMMs (based on DRAM required) for main Cisco IOS software functions.

SRAM

512 KB (fixed)2

 

SRAM for secondary CPU cache memory functions.

NVRAM

512 KB (fixed)3

 

Nonvolatile random-access memory for the system configuration file.

Flash Memory (SIMM)4

8 MB

1

Contains Cisco IOS software images and other user-defined files on the GRP.

Flash Memory (card)

20 MB5

Up to 2

Contains Cisco IOS software images and other user-defined files on up to two PCMCIA-based Flash memory cards.6

Flash boot ROM

512 KB

1

Flash EPROM for the ROM monitor program boot image.

1 64 MB of DRAM is the default DRAM configuration for the GRP.

2 SRAM is not user configurable or field upgradeable.

3 NVRAM is not user configurable or field upgradeable.

4 SIMM socket is wired for Cisco's own design and does not accept industry-standard 80-pin Flash SIMMs.

5 20-MB Flash memory card is the default shipping configuration for the Cisco 12012.

6 Type 1 or Type 2 PCMCIA cards can be used in either PCMCIA slot.


Figure 1-3 GRP (Horizontal Orientation Shown)

DRAM

The extended data output (EDO) dynamic random-access memory (DRAM) on the GRP stores routing tables, protocols, and network accounting applications, and runs the Cisco IOS software. The standard (default) GRP DRAM configuration is 64 megabytes (MB) of EDO DRAM, which you can increase up to 256 MB through DRAM upgrades. The Cisco IOS software runs from within GRP DRAM. lists the DRAM configurations and upgrades.

Table 1-2 DRAM Configurations

Total DRAM
Product Numbers
DRAM Sockets
Number of DIMMs

64 MB1

MEM-GRP/LC-64(=)

U39 (bank 1)

1 64-MB DIMM

128 MB

MEM-GRP/LC-64(=)

U39 (bank 1) and U42 (bank 2)


2 64-MB DIMMs

128 MB

MEM-GRP/LC-128(=)

U39 (bank 1)

1 128-MB DIMM

256 MB

MEM-GRP/LC-256(=)

U39 (bank 1) and U42 (bank 2)


2 128-MB DIMMs

1 64-MB is the standard (default) DRAM configuration for the GRP.



Caution   
To prevent memory problems, DRAM DIMMs must be 3.3-volt (V), 60-nanosecond (ns) devices. Do not attempt to install other devices in the DIMM sockets.

SRAM

SRAM provides secondary CPU cache memory. The standard GRP configuration is 512 KB. Its principle function is to act as a staging area for routing tables update information to and from the line cards. SRAM is not user configurable or field-upgradeable.

NVRAM

The system configuration, software configuration register settings, and environmental monitoring logs are contained in the 512-KB NVRAM, which is backed up with built-in lithium batteries that retain the contents for a minimum of five years. NVRAM is not user configurable or field-upgradeable.


Caution   
Before you replace the GRP in the system, back up the running configuration to a Trivial File Transfer Protocol (TFTP) file server or an installed Flash memory card so you can retrieve it later. If the configuration is not saved, the entire configuration will be lost—inside the NVRAM on the removed GRP—and you will have to reenter the entire configuration manually. This procedure is not necessary if you are temporarily removing a GRP; lithium batteries retain the configuration in memory until you replace the GRP in the system.

Flash Memory

Both the onboard and PCMCIA card-based Flash memory allow you to remotely load and store multiple Cisco IOS software and microcode images. You can download a new image over the network or from a local server and then add the new image to Flash memory or replace the existing files. You can then boot the routers either manually or automatically from any of the stored images. Flash memory also functions as a TFTP server to allow other servers to boot remotely from stored images or to copy them into their own Flash memory.

System Status LEDs

This section describes the two types of system status LEDs used on the GRP: LED indicators and alphanumeric LED displays.

The GRP has the following eight LED indicators:

Two PCMCIA activity LEDs (one per PCMCIA slot): these LEDs light when the slot is accessed. The LEDs receive power from the switched slot voltage.

Four RJ-45 Ethernet port LEDs: these LEDs are used in conjunction with the RJ-45 Ethernet connector. When the MII Ethernet port is in use, the LEDs are disabled. The LEDs indicate link activity, collision detection, data transmission, and data reception.

Two RJ-45 or MII Ethernet port select LEDs: these LEDs, when on, identify which one of the two Ethernet connections you selected. When the RJ-45 port is selected, its LED is on and the MII LED is off. When the MII port is selected, its LED is on and the RJ-45 LED is off.

The alphanumeric displays are organized as two rows of four characters each. The displays' content is controlled by the MBus module software. The displays' content is controlled by the GRP's MBus module software. Both rows of the display are powered by the MBus module.

These alphanumeric displays provide information about the following:

System status messages that are displayed during the boot process

System status messages that are displayed after the boot process is complete

During the boot process, the alphanumeric LED displays are controlled directly by the MBus. After the boot process, they are controlled by the Cisco IOS software (via the MBus), and display messages designated by the Cisco IOS software.

The following levels of system operation are displayed:

Status of the GRP

System error messages

User-defined status/error messages


Note   A complete, descriptive list of all system and error messages is located in the Cisco IOS System Error Messages publications.


Soft Reset Switch

A soft reset switch provides a reset to the R5000's software on the GRP. Access to the soft reset switch is through a small opening in the GRP faceplate. To depress the switch, you must insert a paperclip or similar sharp pointed object into the opening.


Caution   
To prevent system problems or loss of data, use the soft reset switch only at the advice of Cisco service personnel.

PCMCIA Slots

The GRP has two PCMCIA slots available. Either slot can support a Flash memory card or an input/output (I/O) device as long as the device requires only +5 VDC. The GRP supports Type 1 and Type 2 devices; it does not support +3.3 VDC PCMCIA devices. Each PCMCIA slot has an ejector button for ejecting a PCMCIA card from the slot.

Asynchronous Serial Ports

Two asynchronous serial ports on the GRP, the console and auxiliary ports, allow you to connect external devices to monitor and manage the system. The console port is an Electronics Industries Association/Telecommunications Industry Association (EIA/TIA)-232 receptacle (female) that provides a data circuit-terminating equipment (DCE) interface for connecting a console terminal.


Note   EIA/TIA-232 was known as recommended standard RS-232 before its acceptance as a standard by the Electronic Industries Association (EIA) and Telecommunications Industry Association (TIA).


The auxiliary port is an EIA/TIA-232 plug (male) that provides a data terminal equipment (DTE) interface; the auxiliary port supports flow control and is often used to connect a modem, a channel service unit (CSU), or other optional equipment for Telnet management.

Ethernet Port

The GRP has one Ethernet port available, using one of the following two connection types:

RJ-45 receptacle: an 8-pin media dependent interface (MDI) RJ-45 receptacle for either IEEE 802.3 10BaseT (10 Mbps) or IEEE 802.3u 100BaseTX (100 Mbps) Ethernet connections.

MII receptacle: a 40-pin media independent interface (MII) receptacle that provides additional flexibility in Ethernet connections. The pinout of this standard 40-pin receptacle is defined by the IEEE 802.3u standard.


Note   The RJ-45 and MII receptacles on the GRP represent two physical connection options for one Ethernet interface; therefore, you can use either the MDI RJ-45 connection or the MII connection, but not both simultaneously.


Performance Route Processor

Each Cisco 12012 GSR has one main system (or route) processor. The route processor (RP) processes the network routing protocols and distributes updates to the Cisco Express Forwarding (CEF) tables on the line cards. The RP also performs general maintenance functions, such as diagnostics, console support, and line card monitoring.

Two types of RPs are available for the Cisco 12012 GSR:

Gigabit Route Processor (GRP)

Performance Route Processor (PRP)

When not explicitly specified, this document uses the term route processor (RP) to indicate either the GRP or the PRP.


Note   If you install a second, redundant RP, it must be of the same type as the primary RP.


The section describes the Performance Route Processor (PRP) and includes the following information:

PRP Memory Components

System Status LEDs

Soft Reset Switch

PCMCIA Slots

Asynchronous Serial Ports

Ethernet Port

If you have a GRP, see the "Gigabit Route Processor" section.

shows the front panel view of the PRP.

Figure 1-4 Performance Route Processor (Front Panel View, Horizontal Orientation Shown)

The PRP is available as Product Number PRP-1=, which includes one PRP with 512 MB of synchronous dynamic random-access memory (SDRAM) and one 64-MB advanced technology attachment (ATA) Flash disk.

The primary functions of the PRP are as follows:

Downloading the Cisco IOS software to all of the installed line cards at power up

Providing a console (terminal) port for router configuration

Providing an auxiliary port for other external equipment (such as modems)

Providing two IEEE 802.3, 10/100-megabits-per-second (Mbps) Ethernet ports for Telnet functionality

Running routing protocols

Building and distributing routing tables to line cards

Providing general system maintenance functions

Communicating with line cards either through the switch fabric or through the maintenance bus (MBus)

The MBus connection allows the PRP to download a system bootstrap image, collect or load diagnostic information, and perform general, internal system maintenance operations. The switch fabric connection is the main data path for routing table distribution as well as for packets that are sent between line cards and the PRP.

The PRP contains the following components:

Motorola PowerPC 7450 central processing unit (CPU). The CPU runs at an external bus clock speed of 133 MHz and an internal clock speed of 667 MHz.

Up to 2 GB of SDRAM on two PC133-compliant, dual in-line memory modules (DIMMs). 512 MB of SDRAM is the default shipping configuration. SDRAM is field replaceable.

Two MB of SRAM for secondary CPU cache memory functions. SRAM is not user configurable or field replaceable.

Two MB of NVRAM. NVRAM is not user configurable or field replaceable.

Additional memory components used by the system, including onboard Flash memory and up to two Flash memory cards.

Air-temperature sensors for environmental monitoring.

The Cisco IOS software images that run the Cisco 12000 series Internet Router system are stored in Flash memory. Two types of Flash memory ship with the PRP:

1 Onboard Flash memory — Ships as a single in-line memory module (SIMM). This Flash memory contains the Cisco IOS boot image (bootflash) and is not field replaceable.

2 Flash disk— The PRP ships with a Flash disk that can be installed in either Flash disk slot. (See .) The Flash disk contains the Cisco IOS software image.

Storing the Cisco IOS images in Flash memory enables you to download and boot from upgraded Cisco IOS software images remotely, or from software images that reside in PRP Flash memory.

Cisco 12000 series Internet Routers support downloadable system software for most Cisco IOS software upgrades. This enables you to remotely download, store, and boot from a new Cisco IOS software image. The Cisco IOS software runs from within the PRPs SDRAM.

shows the locations of the various hardware components on the PRP.

Figure 1-5 PRP (Horizontal Orientation)

1

Backplane connector

6

Ethernet ports

2

Flash SIMM (Socket number P3)

7

Auxiliary port

3

SDRAM DIMMs
Bank 1 - Socket number U15
Bank 2 - Socket number U18

8

Console port

4

Ejector lever

9

Handle

5

Flash disk slots (covered)

10

Display LEDs


PRP Memory Components

lists the memory components on the PRP.

Table 1-3

Type
Size
Quantity
Description

SDRAM1

512 MB, 1 GB, or 2 GB

1 or 2

512-MB and 1-GB DIMMs (based on desired SDRAM configuration) for main Cisco IOS software functions

SRAM2

2 MB (fixed)

Secondary CPU cache memory functions

NVRAM3

2 MB (fixed)

1

System configuration files, register settings, and logs

Flash memory

64 MB SIMM4

1

Cisco IOS boot image (bootflash), crash information, and other user-defined files

 

Flash disks5

1 or 2

Cisco IOS software images, system configuration files, and other user-defined files on up to two Flash disks

Flash boot ROM

512 KB

1

Flash EPROM for the ROM monitor program boot image

1 Default SDRAM configuration is 512 MB. Bank 1 (U15) must be populated first. You can use one or both banks to
configure SDRAM combinations of 512 MB, 1 GB, or 2 GB. 1.5-GB configurations are not supported.

2 SRAM is not user configurable or field replaceable.

3 NVRAM is not user configurable or field replaceable.

4 Flash memory SIMM is not user configurable or field replaceable.

5 ATA Flash disks and Type I and Type II linear Flash memory cards are supported. See the
"Flash Memory" section for Flash disk information.


PRP Memory Components


Note   If a single DIMM module is installed, it must be placed in bank 1 (U15).


SDRAM

SDRAM stores routing tables, protocols, and network accounting applications, and runs the Cisco IOS software. The default PRP configuration includes 512 MB of error checking and correction (ECC) SDRAM. DIMM upgrades of 512 MB and 1 GB are available. You cannot mix memory sizes. If two DIMMS are installed, they must be the same memory size.


Caution   
Cisco Systems strongly recommends that you use only Cisco-approved memory. To prevent memory problems, SDRAM DIMMs must be +3.3VDC, PC133-compliant devices. Do not attempt to install other devices in the DIMM sockets.

SRAM

SRAM provides 2 MB of parity-protected, secondary CPU cache memory. Its principal function is to act as a staging area for routing table updates and for information sent to and received from line cards. SRAM is not user configurable and cannot be upgraded in the field.

NVRAM

NVRAM provides 2 MB of memory for system configuration files, software configuration register settings, and environmental monitoring logs. This information is backed up with built-in lithium batteries that retain the contents for a minimum of 5 years. NVRAM is not user configurable and cannot be upgraded in the field.

Flash Memory

Flash memory allows you to remotely load and store multiple Cisco IOS software and microcode images. You can download a new image over the network or from a local server and then add the new image to Flash memory or replace the existing files. You then can boot the routers either manually or automatically from any of the stored images.

Flash memory also functions as a Trivial File Transfer Protocol (TFTP) server to allow other servers to boot remotely from stored images or to copy them into their own Flash memory. The onboard Flash memory (called bootflash) contains the Cisco IOS boot image, and the Flash disk contains the Cisco IOS software image. A 64-MB ATA Flash disk ships by default with the PRP. lists the supported Flash disk sizes and their Cisco product numbers.

Table 1-4

Flash Disk Size 1
Product Number

64 MB2

MEM-12KRP-FD64=

128 MB

MEM-12KRP-FD128=

1 GB

MEM-12KRP-FD1G=

1 Standard Type 1 and Type 2 linear Flash memory cards also are supported, although they may not have the capacity to meet the requirements of your configuration.

2 64-MB ATA Flash disk is the default shipping configuration.


Supported Flash Disk Sizes and Product Numbers

System Status LEDs

The sections describes the two types of system status LEDs used on the PRP: LED indicators and alphanumeric LED displays.

The device or port activity indicators consist of the following functional groups:

Two Flash disk activity LEDs (labeled SLOT-0 and SLOT-1)—1 LED per Flash disk slot: these go on when the slot is accessed.

Four RJ-45 Ethernet port LEDs (labeled LINK, EN, TX, and RX): used in conjunction with each of the RJ-45 Ethernet connectors. Each connector includes a set of 4 LEDs that indicate link activity (LINK), port enabled (EN), data transmission (TX), and data reception (RX).

Two Ethernet connection LEDs (labeled PRIMARY): these two LEDs, when on, identify which of the two Ethernet connections is selected. Since both ports are supported on the PRP, the LED on port ETH0 is always on. The ETH1 LED goes on when it is selected.

The alphanumeric display LEDs are organized as two rows of four characters each and are located at one end of the card. These LEDs provide system status and error messages that are displayed during and after the boot process. The boot process and the content displayed are controlled by the PRPs MBus module software.

At the end of the boot process, the LEDs are controlled by the Cisco IOS software (via the MBus), and the content displayed is designated by the Cisco IOS software.

The alphanumeric display LEDs provide information about the following:

Status of the PRP

System error messages

User-defined status and error messages


Note   A complete, descriptive list of all system and error messages is located in the Cisco IOS System Error Messages publications.


Soft Reset Switch

The soft reset switch causes a nonmaskable interrupt (NMI) and places the PRP in ROM monitor mode. When the PRP enters ROM monitor mode, its behavior depends on the setting of the PRP software configuration register. For example, when the boot field of the software configuration register is set to 0x0, and you press the NMI switch, the PRP remains at the ROM monitor prompt (rommon>) and waits for a user command to boot the system manually. But if the boot field is set to 0x1, the system automatically boots the first IOS image found in the onboard Flash memory SIMM on the PRP.


Caution   
The soft reset (NMI) switch is not a mechanism for resetting the PRP and reloading the IOS image. It is intended for software development use. To prevent system problems or loss of data, use the soft reset switch only on the advice of Cisco service personnel.

Access to the soft reset switch is through a small opening in the PRP faceplate. To press the switch, you must insert a paper clip or similar small pointed object into the opening.

Flash Disk Slots

The PRP includes two Flash disk (PCMCIA) slots. Either slot can support an ATA Flash disk or a Type 1 or Type 2 linear Flash memory card. The PRP ships by default with one 64-MB ATA Flash disk.


Note   The PRP only supports +5VDC Flash disk devices. It does not support +3.3VDC PCMCIA devices.


All combinations of different Flash devices are supported by the PRP. You can use ATA Flash disks, Type 1 or Type 2 linear Flash memory cards, or a combination of the two. Each Flash disk slot has an ejector button for ejecting a card from the slot.


Note   Type 1 and Type 2 linear Flash memory cards may not have the capacity to meet the requirements of your configuration.


Asynchronous Serial Ports

The PRP has two asynchronous serial ports, the console and auxiliary ports. These allow you to connect external serial devices to monitor and manage the system. Both ports use RJ-45 receptacles.

The console port provides a data circuit-terminating equipment (DCE) interface for connecting a console terminal. The auxiliary port provides a data terminal equipment (DTE) interface and supports flow control. It is often used to connect a modem, a channel service unit (CSU), or other optional equipment for Telnet management.

Ethernet Ports

The PRP includes two Ethernet ports, both using an 8-pin RJ-45 receptacle for either IEEE 802.3 10BASE-T (10 Mbps) or IEEE 802.3u 100BASE-TX (100 Mbps) connections.


Note   The transmission speed of the Ethernet ports is auto-sensing by default and is user configurable.


Line Cards

The Cisco 12012 is shipped from the factory with up to 11 installed line cards that provide a variety of network media types (based on your order). The line cards are installed in slots 0 through 11 in the upper card cage and interface to each other and to the RP through the switch fabric (cards in the lower card cage). Vertical cable-management brackets attach to each line card to manage and organize the network interface cables.

Line cards installed in the Cisco 12012 support online insertion and removal (OIR), which means you can remove and replace a line card while the Cisco 12012 remains powered up.


Caution   
To ensure adequate airflow through the upper card cage, empty card slots must have a card blank installed.


Note   Detailed instructions for removing, replacing, and configuring the line cards supported by the Cisco 12012 are contained in the configuration note for the individual line card.


Alarm Card

The alarm card occupies a special slot (rightmost slot) in the upper card cage. The slot is labeled Alarm card, is physically narrower, and has a different backplane connector than the rest of slots in the upper card cage.

The alarm card has three primary functions:

Provides a visual display of three severity levels of alarms (critical, major, and minor) detected by the system through the MBus. The alarms can warn of an overtemperature condition on a component in the card cage assembly, a fan failure in a blower module, an overcurrent condition in a power supply, or an out-of-tolerance voltage on one of the cards in the upper or lower card cage. The threshold levels for triggering the different stages of alarms are set by software.

The RP continuously polls the system for temperature, voltage, current, and fan speed values. If a threshold value is detected, the RP sets the appropriate severity level of alarm on the alarm card lighting one of three pairs of LEDs and energizing the appropriate alarm card relays activating any external audible or visual alarms.

Provides a connection point for the system to connect to two site-wide external alarm systems. Two redundant, 25-pin D-sub connectors on the alarm card faceplate are tied directly to the critical, major, and minor alarm relay normally open, normally closed, and common contacts. Only safety extra-low voltage (SELV) external alarm circuits can be attached to the two alarm card connectors. The external alarm can be visual or audible. Audible external alarms can be reset by the reset switch on the alarm card faceplate. Visual alarms are reset by software.

Provides visual status of the clock and scheduler cards and the switch fabric cards. Five pairs of LEDs (one pair for each slot in the lower card cage) provide a visual status of the switch fabric.

The alarm card faceplate contains the following connectors and indicators (see ):

Critical/Major/Minor LEDs—Three pairs of LEDs; two pairs are red, and one pair is amber. The LEDs are driven by MBus software. The LEDs give a visual indication of critical, major, and minor alarms detected by the system. The LEDs are paired for redundancy.

Audible alarm cutoff switch—A switch used to turn off an external audible alarm. It does not affect any visual (LED) alarms set on the alarm card. The audible alarm remains activated until the alarm condition is cleared or this button is pressed.

Alarm 1 and alarm 2 connectors—Two, 25-pin D-sub connectors. The alarm card relay contacts are tied to these two connectors. You can attach visual and audible alarm circuits to the alarm 1and alarm 2 connectors.


Note   Only safety extra-low voltage (SELV) circuits can be connected to the alarm 1 and alarm 2 connectors. Maximum rating for the alarm circuit is 2 amps, 50 volt-amp.


CSC/SFC LEDs—Five pairs of LEDs (one pair for each slot in the lower card cage) showing clock and scheduler card status and switch fabric card status. A green enabled LED indicates that the card in that slot has been detected by the system. A red fail LED indicates that the system has detected a fault in the card in that slot.

Figure 1-6 Alarm Card Faceplate LEDs, Switches, and Connectors

Switch Fabric

The heart of the Cisco 12012 is the switch fabric circuity, which provides synchronized gigabit speed interconnections for the line cards and the RP. The switch fabric circuitry is contained on two types of cards, a clock and scheduler card and a switch fabric card, which install in the five slots in the lower card cage. (See .) A clock and scheduler card is installed in either slot 0 or slot 1 (CSC 0 or CSC 1) in the lower card cage; a switch fabric card is installed in slot 2, slot 3, or slot 4 (SFC 1, SFC 2, or SFC 3) in the lower card cage. A system must have a one clock and scheduler card installed to operate. Both types of cards have a switching capacity of 15 Gbps. You can add switching capacity (up to 60 Gbps) and redundancy by increasing the number of switch cards (to a maximum of five cards) installed in your system.

Figure 1-7 Lower Card Cage

Each clock and scheduler card or switch fabric card provides OC-12/STM-4 (622 Mbps) switching bandwidth for the system. By adding three more cards in the lower card cage, the bandwidth is increased to OC-48/STM-16 (2.4 Gbps). lists the switch fabric bandwidth and the card configurations needed to support the bandwidth.

Table 1-5 Switch Fabric Configurations

Switch Fabric Bandwidth
Clock and Scheduler Card
Switch Fabric Card

OC-12/STM-4

11

0

OC-12/STM-4 redundant

2

0

OC-48/STM-16

1

3

OC-48/STM-16 redundant

2

3

1 One clock and scheduler card must be installed in a system.


A minimally configured system has one clock and scheduler card installed. This configuration provides an OC-12/STM-4 bandwidth, but no switch fabric, clock, or scheduler redundancy. Adding a second clock and scheduler card provides fabric, clock, and scheduler redundancy, but no increase in bandwidth. Adding three switch fabric cards to a system with a single clock and scheduler card increases the system bandwidth to OC-48/STM-16, but no clock or scheduler redundancy. Adding a second clock and scheduler card to the system gives you OC-48/STM-16 bandwidth plus fabric, clock, and scheduler redundancy.

The clock and scheduler card contains the following functionality:

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

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—Circuitry that carries the user traffic between line cards or between the RP and a line card. The switch fabric on the clock and scheduler card is identical to the switch fabric on the switch fabric card.

The switch fabric card contains only the switch fabric circuitry, which carries user traffic between line cards or between the RP and the line cards. The switch fabric card receives scheduling information and the system clock from the clock and scheduler card. The switch card is keyed to occupy slots 2, 3, and 4 (lower three slots) in the lower card cage. A minimally configured Cisco 12012 does not require a switch fabric card; however, to maximize the bandwidth and switching capacity of the Cisco 12012, three switch fabric cards must be installed.

Status of the cards in the lower card cage is displayed by five pairs of LEDs (one pair for each card slot) on the alarm card in the upper card cage. Each pair of LEDs includes a green enable LED, which indicates the clock and scheduler card (CSC) or switch fabric card (SFC) is installed and operational, and a red fail LED, which indicates a fault has been detected on the card installed in that slot.

Power Supplies

The power supply bay, located at the bottom of the card cage assembly, can accommodate up to four AC-input power supplies or two dual-width DC-input power supplies.


Caution   
Do not mix power supplies in the Cisco 12012. In multiple power supply system configurations, all power supplies must be of the same type (four AC-input power supplies or two DC-input power supplies).


Note   Detailed instructions for handling and replacing the Cisco 12012 power supplies are contained in the configuration notes Cisco 12012 Gigabit Switch Router AC-Input Power Supply Replacement Instructions (Document Number 78-4334-xx) and Cisco 12012 Gigabit Switch Router DC-Input power Supply Replacement Instructions (Document Number 78-4330-xx). The appropriate configuration note accompanies each AC-input or DC-input power supply that is shipped from the factory as a FRU.


AC-Input Power Supply

The AC-input power supply is a modular unit that measures 10 inches (25.4 cm) by 3.8 inches (9.6 cm) wide by 15 inches (38 cm) deep and weighs 18 lb (8.2 kg). (See .) The Cisco 12012 requires two AC-input power supplies to operate. Installing one or two additional AC-input power supplies provides power supply redundancy and current sharing capability.


Warning   

AC operation requires a minimum configuration of two AC-input power supplies.


An AC-input power supply has the following features:

A power factor corrector (PFC). Allows the power supply to accept source AC voltages from 180 to 264 VAC, single phase, 47 to 63 Hz. Each AC-input power supply requires a dedicated 20A service, North America; 10A or 16A, International.

A handle. Provides a grip point for removing and replacing the power supply.

A captive screw at the bottom of the faceplate. Secures the power supply in the power supply bay.

A power supply power cord appliance coupler. The main disconnect for the system. The power supply power switch engages a latch that secures the power supply in the power supply bay.

Two LEDs on the power supply faceplate. Indicate the following:

A green AC OK LED indicates that the source AC voltage is within the operational range of 200 to 264 VAC. The LED is on any time the power supply is connected to source AC and the power supply power switch is on. If the LED is off, a problem might be indicated.

A red output fail LED indicates that one or both of the power supply output voltages (+5 and -48 VDC) is out of tolerance. The LED flashes on and off for five seconds as a test of the LED when you first turn on the power supply.

An AC power cord receptacle, located to the left of the handle. A modular 14-ft (4.3-m) power cable connects the AC-input power supply to the site AC power source. AC power cords with different source AC power plugs are available. A spring clip secures the power cable to the AC-input power supply.

Connect each AC-input power supply to a separate AC power source.


Note   We recommend you install an uninterruptable power source (UPS) as a safeguard against power loss.


Figure 1-8 AC-Input Power Supply

DC-Input power Supply

The DC-input power supply is a modular unit that measures 10 inches high (25.4 cm), 7.84 inches (19.9 cm) wide (twice as wide as the AC-input power supply), 15 inches (38.1 cm) deep, and weighs 19 lb (8.6 kg). The Cisco 12012 requires one DC-input power supply. Adding a second DC-input power supply provides redundancy.

The DC-input power supply has the following features (see ):

Operates from a DC source voltage of -40.5 to -75 VDC and requires a dedicated 60A service.

A handle. Provides a grip point for removing and replacing the power supply.

A captive jackscrew. Seats and unseats the power supply in the backplane power supply connector and secures the power supply to the power supply bay.

A power switch. Turns the power supply on and off and controls a latch that secures the power supply in the power supply bay. Turning the power switch on (|) engages the latch; turning the power switch off (O) releases the latch.

Two LEDs on the power supply faceplate. The LEDs indicate the following:

A green input OK LED indicates that the source DC voltage is within the operational range of -40.5 to -75 VDC. The LED is on anytime the power supply is connected to source DC and the power supply power switch is on.

A red output fail LED indicates that one or both of the power supply output voltages (+5 and -48 VDC) is out of tolerance. The LED will flash on and off for five seconds as a test of the LED when the power supply is first turned on.

Six threaded terminals—two each for negative (source DC), positive (source DC return), and ground. A hardwired source DC power cable is required from the site DC power source to the DC-input power supply. The DC power cable leads should be 4 American Wiring Gauge (AWG) high strand count wire. The lugs for connecting power cable leads to the power supply should be dual-hole, M6 terminal lugs with .625-inch (15.86-mm) centers.

An external circuit breaker alarm. Indicates when a DC-input power supply circuit breaker has tripped. A terminal block with three connectors is mounted on the left side of the power supply for this external alarm.

Figure 1-9 DC-Input Power Supply


Caution   
To ensure adequate airflow across the router's power supplies, a power supply or a power supply blank must be installed in each power supply bay.

Power Distribution

The backplane distributes power in the Cisco 12012 through the backplane to all cards in the upper and lower card cages and to the two blower modules through two harnesses. (See .) The power supplies convert either source AC or source DC into +5 VDC and -48 VDC. The +5 VDC goes directly to each card to power the MBus module. The -48 VDC feeds a DC-DC converter also on each card. The MBus module controls the DC-DC converter. When directed by the RP or by MBus software, the MBus module turns on the DC-DC converter; the -48 VDC is converted into +3.3 VDC and +5 VDC for use by the card.

Power for the blower modules is supplied directly from the backplane through two harnesses mounted on the frame. An internal blower module controller card converts -48 VDC into a variable DC voltage which powers the blower module fans. An increase in the system ambient air temperature increases the voltage to the fans, increasing their speed.

Figure 1-10 Cisco 12012 Power Distribution

Blower Module

The Cisco 12012 has two blower modules; one is located above the upper card cage, and the second is located below the power supply bay. (See .) The two blower modules maintain acceptable operating temperatures for the internal components by drawing cooling air through both card cages and the power supply bay.

The blower module is a sheet metal enclosure containing three fans, a fan controller card, and two faceplate LEDs. (See .) The top and bottom blower modules are identical and are interchangeable. Both blower modules have snap-on plastic front covers mounted over the blower module faceplates. Two blower module LEDs are visible through the front covers.

Figure 1-11 Blower Module (Shown without the Blower Module Front Cover)

The blower modules draw room air in through an air filter on the front of the lower card cage (See ). The top blower module draws the air up through the upper card cage and out through exhaust vents on the back of the blower module; the bottom blower module draws the air down through the lower card cage and power supply bay and out through exhaust vents on the back of the blower module.

The front and back of the Cisco 12012 must remain unobstructed to ensure adequate air flow and prevent overheating inside the card cage assembly; we recommend at least 6 inches (15.2 cm) of clearance.

Figure 1-12 Internal Air Flow (Side View)

A blower module controller card in the blower module monitors and controls the operation of the three variable-speed fans. The variable-speed feature enables quieter operation by allowing the blower modules to operate at less than maximum speed when doing so provides adequate cooling to maintain an acceptable operating temperature inside the card cage assembly.

Temperature sensors (two per card) monitor the internal air temperature. When the ambient air temperature is within normal operating range, the fans operate at their lowest speed, which is 55 percent of the maximum speed.

If the air temperature inside the card cage assembly rises, fan speed increases to provide additional cooling air to the internal components. If the internal air temperatures continue to rise beyond the specified threshold, the system environmental monitor shuts down all internal power to prevent equipment damage from excessive heat.

If the system detects that one of three fans within a blower module has failed, it displays a warning message on the console screen. In addition, the two remaining fans go to full speed to compensate for the loss of the one fan. If another fan fails, the system shut downs to prevent equipment damage.

A handle on the blower module provides a grip point for removing and replacing a blower module. (See .) Two LEDs (one green and one red), visible through the blower module front cover, provide blower module status. The green LED, when on, indicates all three fans are operating normally. The red LED should remain off during normal operation. If the red LED is on, a fan failure or other fault has been detected in the blower module. The fault can be one or more stopped fans or one or more fans running below speed, or the controller card has a fault.


Note   The configuration note Cisco 12012 Gigabit Switch Router Blower Module Replacement Instructions (Document Number 78-4335-xx) contains detailed instructions for removing and replacing a blower module. This configuration note accompanies every blower module that is shipped from the factory as a FRU.


Air Filter

The Cisco 12012 is equipped with a serviceable air filter mounted in a hinged tray located in front of the lower card cage. Do not run the Cisco 12012 without an air filter installed. You should inspect and clean the air filter once a month (more often in dusty environments). Procedures for vacuuming and replacing the air filter are contained in the section "Cleaning and Replacing the Air Filter Assembly" in the chapter "Maintaining the Cisco 12012."

Cable-Management System

The Cisco 12012 cable-management system organizes the interface cables entering and exiting the system, keeping them free of sharp bends (excessive bending in an interface cable can cause performance degradation) and out of the way. The Cisco 12012 cable-management system consists of two components: a horizontal cable-management tray attached to the frame above the upper card cage, and vertical cable-management brackets, one bracket per line card. (See .)

The horizontal cable-management tray keeps all of the interface cables organized as the cables enter the Cisco 12012 from either the left or right side, and directs them down through the bottom of the tray to the individual line cards.

A vertical cable-management bracket attaches to each line card with two captive screws. Rubber clips on the bracket hold the interface cables in place, keeping the cables organized. On line cards with multiple ports, the vertical cable-management bracket keeps the interface cables organized when you remove and replace the line card. You can unplug the interface cables from the line card and keep cables clipped in the vertical cable-management bracket while you remove the bracket from the line card. Then, when you replace the line card, the interface cables are already broken out to the correct line card interface connectors.

Figure 1-13 Cable-Management System

Maintenance Bus

The Cisco 12012 maintenance bus (MBus) and MBus modules manage all of the maintenance functions of the system.

The Cisco 12012 MBus consists of two separate busses (providing MBus redundancy) that link all of the line cards, the RP, the switch fabric cards, the power supplies, and the blower modules. Each component contains an MBus module that allows the component to communicate over the MBus. The MBus module on each component is powered by +5 VDC directly from the power supply. The MBus modules perform the following functions:

Power-up/down control—Each MBus module directly controls the DC-DC converters on the component it is mounted on based on commands it receives from its on-board EPROM and from the master RP. Each MBus module is tied directly to +5 VDC from the power supply. When power is applied to the Cisco 12012, all MBus modules immediately power up. The MBus modules on the RP or clock and scheduler card immediately turn on the DC-DC converter, powering up the respective card. The line card MBus module waits to power up the line card until it receives a command from the master RP.

Device discovery—The RP can determine the system configuration using the MBus. A message is sent from the RP over the MBus requesting all installed devices to identify themselves. The response back provides slot number and card and component type.

Code download—A portion of the line card operating software can be downloaded from the RP to the line card over the MBus. Because the MBus is relatively slow compared to the switch fabric, only enough code is downloaded to the line card for it to access the switch fabric and complete the download process.

Diagnostics—The diagnostic software image is downloaded from the RP to the card under test.

Environmental monitoring and alarms—The MBus module on each component monitors that component's environment as follows:

Line cards and the RP are monitored for temperature by two temperature sensors mounted on each card. The MBus module makes voltage adjustments through software for the +3.3- and +5-VDC DC-DC converters.

Clock and scheduler cards and switch fabric cards are monitored for temperature by two temperature sensors mounted on each card. The MBus module makes voltage adjustments through software for the +3.3- and +5-VDC DC-DC converters

Environmental monitoring includes voltage monitoring, temperature monitoring from two temperature sensors, and rotational speed sensing for each blower module fan.

System Specifications

This section lists the Cisco 12012 specifications. The specifications are listed in three tables: lists the physical specifications, lists the electrical specifications, and lists the environmental specifications.

Table 1-6 Cisco 12012 Physical Specifications

Description
Value

Frame height

57 inches (144.8 cm)

Frame width

17.4 inches (44.2 cm)
19.375 inches (49.2 cm) including flanges

Frame depth

21 inches (53.3 cm) including cable- management system

Weight:
Maximum configuration
Minimum configuration
Shipping


380 lb (172.4 kg)
250 lb (113.6 kg)
460 lb (208.6 kg)


Table 1-7 Cisco 12012 Electrical Specifications

Description
Value

AC-input power

1560 watts

AC-input voltage

200-240 VAC nominal (single-phase)

AC-input current rating

9.5 amps (@ 200 VAC)

DC-input power

3000 watts

DC-input voltage

-48 VDC nominal in North America
-60 VDC nominal in the European Community

DC-input current rating

55 amps (A) @ 50 VDC


Table 1-8 Cisco 12012 Environmental Specifications

Description
Value

Temperature

32° to 104°F (0 to 40°C) operating
-4° to 149°F (-20 to 65°C) nonoperating

Humidity

10 to 90% noncondensing operating
5 to 95% noncondensing nonoperating

Altitude

0 to 10,000 ft (0 to 3,050 m) operating
0 to 30,000 ft (0 to 9,144 m) nonoperating

Heat dissipation

10,640 Btu/hr maximum

Acoustic Noise

69 dbA maximum

Shock

5 to 500 Hz, 0.5g1 (0.1 oct./min.2 ) operating
5 to 100 Hz, 1g (0.1 oct./min.) nonoperating
100 to 500 Hz, 1.5g (0.2 oct./min.)
500 to 1,000 Hz, 1.5g (0.2 oct./min.)

1 g = gravity.

2 oct./min. = octave per minute.


Agency Approvals

In addition to meeting GR-63-CORE and GR-1089-CORE specifications, the Cisco 12012 meets the agency approvals for safety, EMI, and immunity listed in .

Table 1-9 Agency Approvals

Category
Agency Approval

Safety

UL 1950

 

CSA 22.2 No. 950

 

EN60950

 

AUSTEL TS001

 

AS/NZS 3260

EMI

FCC Class A

 

CSA Class A

 

EN55022 Class A

 

VCCI Class 1

 

AS/NRZ 3548 Class A

Immunity

EN61000-4-2/IEC-1000-4-2

 

EN61000-4-3/IEC-1000-4-3

 

EN61000-4-4/IEC-1000-4-4

 

EN61000-4-5/IEC-1000-4-5

 

EN61000-4-6/IEC-1000-4-6

 

EN61000-4-11/IEC-1000-4-11