CH A P T E R 1 Product Overview This chapter provides an overview of the Cisco XR 12416 router. It contains physical descriptions of the router hardware and major components, as well as functional descriptions of the hardware-related features. Physical and Functional Description of Router The Cisco XR 12416 router chassis is a sheet-metal enclosure that houses router components.
Chapter 1 Product Overview Physical and Functional Description of Router • Upper Line card and Route Processor card cage—Has 8 user-configurable slots that support a combination of line cards, a route processor (RP), and an alarm card. See the “Alarm Card and Line Card Overview” section on page 1-18 for additional information. • Switch fabric card cage—Located behind the air filter door, this card cage contains 5 slots for the switch fabric card set.
Lower blower module 26194 CDHNT RA DOWN LOOP LA CD TX 0 RX 0 TX 1 RX 2 E IER T TIV RR PK AC CA RX TX RX TX 1 3 CR RX 4 RX AL JOR OR ITIC MA MIN E IER T TIV RR PK AC CA RX TX TX 2 5 T O/L AC RX 6 RX E IER T TIV RR PK AC CA RX TX ALARM TX 3 7 RX 8 RX E IER T TIV RR PK AC CA RX TX TX 9 L FAI LED AB EN RX TX 10 RX LED AB EN L FAI TX 0 P/H/F 1 C CS 0 1 ALARM 2 C SF Q OC-3/STM-POS 6DS3–SMB P/H/F RX12DS3–SMB OC-48/STM-16-SCPOS 11 ROUTE PROCESSOR RX 45
Chapter 1 Product Overview Physical and Functional Description of Router AC and DC Power Subsystems A router ships with either an AC or DC powered system. Source power connects to the power shelf at the back of the chassis which route power to the power supplies, also referred to as power entry modules (PEMs). Standard AC Power Shelf The standard AC-input power subsystem consists of a single-level AC-input power shelf that house three AC power supplies which supply full redundant power to the router.
Chapter 1 Product Overview Physical and Functional Description of Router Standard AC-Input Power Subsystem PWR OK FAULT PWR OK FAULT PWR OK TEMP FAULT I LIM TEMP I LIM TEMP I LIM Caution 26198 Figure 1-2 A router equipped with the standard AC power subsystem must be operated with three power supplies installed in the power shelf at all times for electromagnetic compatibility (EMC).
Chapter 1 Product Overview Physical and Functional Description of Router Optional AC Power Shelf The power subsystem consists of a double-level AC-input power shelf with bays for 4 AC-input power supplies. Figure 1-4 shows the optional power shelf. It attaches to the top of the router chassis and is secured to the chassis the same way as the standard AC-input power shelf. Note A router equipped with the optional AC-input power subsystem stands 77.5 inches (196.
Chapter 1 Product Overview Physical and Functional Description of Router Figure 1-4 Optional AC-Input Power Subsystem PWR OK FAULT TEMP I LIM PWR OK FAULT TEMP PWR OK FAULT TEMP I LIM PWR OK FAULT TEMP I LIM Caution 27837 I LIM A router equipped with the optional AC power subsystem must be operated with 4 power supplies installed in the power shelf at all times for electromagnetic compatibility (EMC).
Chapter 1 Product Overview Physical and Functional Description of Router AC power to the router is provided through power cords connected from AC power outlets to the connectors on the back of the power shelf as shown in Figure 1-5.
Chapter 1 Product Overview Physical and Functional Description of Router AC Power Supplies Each AC PEM converts 200 to 240 VAC into -48 VDC, which is distributed through the chassis backplane to all cards, RPs, and the blower modules. Figure 1-6 identifies the components of a 2500 W AC power supply.
Chapter 1 Product Overview Physical and Functional Description of Router The status LEDs on an AC PEM provide information about the current operational status of the power supply: • PWR OK (green)—Indicates that the power supply module is operating normally. • FAULT (yellow)—Indicates that a fault is detected within the PEM. • TEMP (yellow)—Indicates the PEM is in an overtemperature condition and shutdown has occurred. • ILMI (yellow)—Indicates the PEM is operating in a current-limiting condition.
Chapter 1 Product Overview Physical and Functional Description of Router In the DC-input power configuration: • Modules A1 and B1 provide redundant power for system load zone 1 (the upper blower module and the upper card cage). • Modules A2 and B2 provide redundant power for system load zone 2 (the switch fabric card cage, the lower card cage, and the lower blower module).
Chapter 1 Product Overview Physical and Functional Description of Router Figure 1-8 DC-Input Power Shelf Connections B1 B2+ B2- B1+ B1- Ground 27964 A1- A1+ A2- A2+ Cover with slotted screw hole; fastens to standoff in middle of cable connection area Cisco XR 12416 Router Installation Guide 1-12 OL-13833-01
Chapter 1 Product Overview Physical and Functional Description of Router DC Power Supplies Each DC PEM operates from a nominal source DC voltage of –48 to –60 VDC and requires a dedicated 60 amp service. Figure 1-9 identifies the components of a 2400 W DC power supply.
Chapter 1 Product Overview Chassis Card Cages The status LEDs on a DC PEM provide information about the current operational status of the power supply: • PWR OK (green)—Indicates that the power supply module is operating normally. • FAULT (yellow)—Indicates that a fault is detected within the PEM. • TEMP (yellow)—Indicates the PEM is in an overtemperature condition and shutdown has occurred.
Chapter 1 Product Overview Chassis Card Cages Lower Card Cage The lower card cage also has eight user-configurable slots that support additional line cards, an alarm card, and an optional, redundant RP. Note The lower card cage is an inverted, or head-down, copy of the upper card cage, which means that cards are installed in an inverted or head-down orientation. The orientation of the slots is opposite that of the upper card cage.
Chapter 1 Product Overview Switch Fabric Overview Switch Fabric Overview The switch fabric provides synchronized gigabit-speed connections between line cards and the RP. The switch fabric card cage is located behind the air filter door and consists of 2 clock and scheduler cards (CSCs) and 3 switch fabric cards (SFCs). One CSC and the 3 SFCs are the active switch fabric; the second CSC provides redundancy for the other 4 cards.
Chapter 1 Product Overview Switch Fabric Overview Caution Do not remove the blank filler panel unless instructed to do so by a Cisco support representative. Clock Scheduler Cards Clock scheduler cards provide the following functionality: • Scheduler—Handles all scheduling requests from the line cards for access to the switch fabric. • System clock—Supplies the synchronizing signal to all SFCs, line cards, and the RP.
Chapter 1 Product Overview Alarm Card and Line Card Overview Alarm Card and Line Card Overview This section provides general information about alarm cards, line cards and types of route processors installed in the router. Note The Cisco XR 12416 router supports online insertion and removal (OIR), which allows you to remove and replace a card while the router remains powered on.
Chapter 1 Product Overview Alarm Card and Line Card Overview – ENABLED (green)—The alarm card is operational and functioning properly. – FAIL (yellow)—The alarm card in that slot is faulty. • A pair of status LEDs that correspond to each of the 5 card slots in the switch fabric card cage (2 CSCs and 3 SFCs): – ENABLED (green) On—The card installed in that slot is operational and functioning properly. Off—Either the slot is empty or the card installed in that slot is faulty.
Chapter 1 Product Overview Route Processor Line Cards Up to 15 Cisco XR 12416 router line cards can be installed in the routers upper and lower card cages to support a variety of physical network media. Ports and connectors on the line card front panels provide interfaces for external connections. Line cards communicate with the RP and exchange packet data with each other through the switch fabric cards.
Chapter 1 Product Overview Route Processor • Uploads the operating system software images to all installed line cards during power-up • Provides out-of-band system console and auxiliary ports and an Ethernet port for router configuration and maintenance • Monitors and manages the power and temperature of system components such as line cards, power supplies, and fans The Cisco PRP-2 delivers all these functions with enhanced performance and capabilities.
Chapter 1 Product Overview Route Processor Performance Route Processor Overview The performance route processor (PRP) uses a Motorola PowerPC 7450 CPU that runs at an external bus clock speed of 133 MHz and has an internal clock speed of 667 MHz. Figure 1-11 identifies the slots, ports, and LEDs on the PRP front panel.
Chapter 1 Product Overview Route Processor PRP Ethernet Ports and Status LEDs The PRP has two 8-pin media-dependent interface (MDI) RJ-45 ports for either IEEE 802.3 10BASE-T (10 Mbps) or IEEE 802.3u 100BASE-TX (100 Mbps) Ethernet connections. These ports are labeled ETH 0 and ETH 1. The transmission speed of the Ethernet port is not user-configurable. You set the speed through an autosensing scheme on the PRP which is determined by the network that the Ethernet port is connected to.
Chapter 1 Product Overview Route Processor PRP Auxiliary and Console Ports The auxiliary and console ports on the PRP are EIA/TIA-232 (also known as RS-232) asynchronous serial ports. These ports connect external devices to monitor and manage the system. • The auxiliary port—A (male) plug 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.
Chapter 1 Product Overview Route Processor PRP Alphanumeric Message Displays The alphanumeric message displays are organized in two rows of four LED characters each (Figure 1-13). Figure 1-13 Alphanumeric Message Displays—Partial Front Panel PROCESSOR Upper alphanumeric LED display (four digits) H10780 Lower alphanumeric LED display (four digits) The alphanumeric message displays show router status messages during the boot process, and after the boot process is complete.
Chapter 1 Product Overview Route Processor PRP Memory Components This section describes various types of memory used on the PRP to support router functions. Table 1-1 provides a quick reference of the different types of memory, and Figure 1-14 shows the location on the PRP board.
Chapter 1 Product Overview Route Processor Figure 1-14 PRP Memory Locations U18 Flash SIMM Bank 2 DRAM DIMMs Bank 1 P3 U15 ETH 0 -1 OT SL -0 OT SL TX AUX CONSOLE RX EN K LIN TX T PRIMARY SE PCMCIA slot-1 and slot-2 (behind cover) ETH 1 RX EN K LIN RE PRIMARY PERFORMANCE ROUTE PROCESSOR 1 (PRP-1) 129256 T EC EJ Cisco XR 12416 Router Installation Guide OL-13833-01 1-27
Chapter 1 Product Overview Route Processor PRP SDRAM The PRP uses Error Checking and Correction (ECC) Synchronized Dynamic Random Access Memory (SDRAM) to store routing tables, protocols, network accounting applications, and to run Cisco IOS software. Table 1-2 lists the DRAM configurations for the PRP. If you are using: • One DIMM—Bank 1 (U15) must be populated first. • Two DIMMs—You cannot mix memory sizes; both banks must contain the same size DIMM.
Chapter 1 Product Overview Route Processor PRP NVRAM Non-volatile Random Access Memory (NVRAM) provides 2 MB of memory for system configuration files, software register settings, and environmental monitoring logs. Built-in lithium batteries retain the contents of NVRAM for a minimum of 5 years. NVRAM is not user configurable and cannot be upgraded in the field. PRP Flash Memory Use flash memory to store multiple Cisco IOS XR software and microcode images that you can use to operate the router.
Chapter 1 Product Overview Blower Module Upper and Lower Cable Management Brackets The Cisco XR 12416 router includes upper and lower cable management brackets that work together with individual line card cable management brackets to organize interface cables entering and exiting the router (see Figure 1-1). Network interface cables to the line cards are fed across the brackets, and then through the openings to the individual line card cable management bracket.
Chapter 1 Product Overview Blower Module Each blower module contains three variable speed fans and a controller card. The two front cover LEDs provide a visual indication of blower module status (Figure 1-15): Figure 1-15 Blower Module 129308 LEDs • OK (green)—All three fans are operating normally. • FAIL (red)—The system has detected a fan failure or other fault in the blower module.
Chapter 1 Product Overview Blower Module Figure 1-16 Cooling Air Flow Power supply shelf Air exhaust Top blower module (Plenum) Upper card cage Air filter Room air Middle card cage Lower card cage (Plenum) Bottom blower module Rear 26204 Front Air exhaust To ensure that there is adequate air flow to prevent overheating inside the card cages keep the front and back of the router unobstructed. We recommend at least 6 inches (15.24 cm) of clearance.
Chapter 1 Product Overview Blower Module Caution You should inspect and clean the air filter one time per month (more often in dusty environments). Do not operate the router without an air filter installed. The blower module controller card monitors and controls operation of three variable-speed fans in the blower modules.
Chapter 1 Product Overview Blower Module Cisco XR 12416 Router Installation Guide 1-34 OL-13833-01
