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CHAPTER1
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. The major components consist of three power supplies, upper and
lower line card cages, a switch fabric card cage, and
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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. The switch fabric card set is mad
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ROUTE PROCESSOR FAST ETERNET OC-12/STM-4 ATM OC-48/STM-16-SCPOS DOWN CDHNT CD LOOP RA LA 12DS3–SMB P/H/F DOWN CDHNT CD LOOP RA LA 6DS3–SMB P/H/F Q OC-3/STM-POS ALARM ALARM ENABLED FAIL EJECT SLOT-1 SLOT-0 RESET AUX CONSOLE COLL LINK RX TX 0 RJ-45 ACTIVE CARRIER RX CELL MII 0 ACTIVE CARRIER RX PKT 1 ACTIVE CARRIER RX PKT CRITICAL MAJOR 2 MINOR ACTIVE CARRIER RX PKT ACO/LT 3 ACCARRIER TIVE RX PKT FAIL ENABLED CSC 0 1 SFC 0 1 2 ACTIVE CARRIER RX PKT TX 0 RX TX 1 RX TX 0 TX RX 2 RX TX 1 TX RX 3 RX
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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 powe
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PWR OK PWR OK PWR OK FAULT FAULT FAULT TEMP TEMP TEMP I LIM I LIM I LIM Chapter 1 Product Overview Physical and Functional Description of Router Figure 1-2 Standard AC-Input Power Subsystem Caution 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). AC power to the router is provided through power cords connected from AC power outlets to connectors on back
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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 (196.85 cm) tall and does not
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PWR OK PWR OK FAULT FAULT TEMP TEMP I LIM I LIM PWR OK PWR OK FAULT FAULT TEMP TEMP I LIM I LIM Chapter 1 Product Overview Physical and Functional Description of Router Figure 1-4 Optional AC-Input Power Subsystem Caution 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). Cisco XR 12416 Router Installation Guide OL-13833-01 1-7 27837
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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. Figure 1-5 Optional Power Shelf AC-Input Connections Power cords Cisco XR 12416 Router Installation Guide OL-13833-01 1-8 27838
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Pwr Ok Fault Temp OC 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. Figure 1-6 2500 W AC Power Supply Components 1 2 1 Ejector handle 2 Captive screw Cisco XR 12416 Router Installation Guide OL-13833-01 1-9 Pwr Ok Fault Temp OC 129495
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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-limitin
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PWR OK PWR OK PWR OK PWR OK FAULT FAULT FAULT FAULT TEMP TEMP TEMP TEMP 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). Figure 1-7 DC-Input Power Shelf Caution A r
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Chapter 1 Product Overview Physical and Functional Description of Router Figure 1-8 DC-Input Power Shelf Connections B1 A1- A1+ A2- A2+ B2+ B2- B1+ B1- Ground Cover with slotted screw hole; fastens to standoff in middle of cable connection area Cisco XR 12416 Router Installation Guide OL-13833-01 1-12 27964
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PWR OK FAULT TEMP OC 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. Figure 1-9 2400 W DC Power Supply Components 2 1 3 4 PWR OK FAULT TEMP OC 1 Handle 3 Ejector lever 2 Fan 4 Power switch Cisco XR 12416 Router Installation Guide OL-13833-01 1-13 129494
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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. For additional information about troubleshooting DC PEMs, see the “Troubleshooting a DC Power
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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. � Slot 8—The far left slot is reserved for an optional
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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. Note 10-Gbps switch fabrics do not operate in 1/4-bandwid
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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. The system clock synchronizes data transfers between line cards or b
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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. Alarm Cards The router is equipped with 2 alarm cards: � One alarm card occupies the dedicated far left slot o
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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. – FAIL (ye
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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. Caution Any unoccupied card slot in the upper and lower card cages must have a bl
