Cisco cBR Series Manual

Cisco Converged Broadband Routers Hardware Installation Guide
First Published: 2015-03-25
Last Modified: 2019-07-31
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©2015–2019 Cisco Systems, Inc. All rights reserved.

CONTENTS
What is a Cisco cBR Series Converged Broadband Router 1
CHAPTER 1
Introduction 1
Functional Overview 2
Upstream Data Path 2
Downstream Data Path 3
Cisco cBR-8 Converged Broadband Router 4
Physical Description 6
Slot Numbering—Physical and Logical 8
Field Replaceable Units 12
Supervisor 15
Cisco cBR-8 Converged Cable Access Router Supervisor 160G 15
Cisco cBR-8 Converged Cable Access Router Supervisor 250G 20
Interface Cards 25
DOCSIS MAC/PHY Cards 26
DOCSIS MAC Cards 30
Power System 33
Fan Module 39
Cooling System of the Cisco cBR Chassis 40
Air Filter 41
Cisco IOS-XE Software 41
NEBS Level 3 Compliance 42
How and What to Order 42
Prepare to Install 47
CHAPTER 2
General Safety Guidelines 47
Safety Instructions 48
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Warning Definition 48
Preventing Electrostatic Discharge Damage 49
Plant Wiring Guidelines 49
Electrical Equipment Guidelines 50
Unpacking and Verifying Shipping Contents 50
Chassis-Lifting Guidelines 51
General Rack Installation Guidelines 51
Cabling Guidelines 53
Installing the Cisco cBR Chassis 55
CHAPTER 3
Installation Methods 55
Verifying Rack Dimensions 55
Installing Chassis Installation Brackets 56
Attaching the Chassis Rack-Mount Brackets 57
Installing the Chassis Installation Handle (Optional) 59
Installing the Cisco cBR-8 in a Rack 60
Installing the Cisco cBR in a Four-Post Rack 61
Installing the Cisco cBR in a Two-Post Rack 63
Attaching the Cable-Management Brackets 65
Attaching the Fiber or Cable Routing Guide on Chassis 66
Attaching a Chassis Ground Connection 70
Installing the Fan Module in Cisco cBR 73
CHAPTER 4
Installing the Fan Module in the cBR Chassis 73
Installing the Power System in the Cisco cBR Chassis 77
CHAPTER 5
Installing the Power Cassette Module in the Cisco cBR Chassis 77
Installing the FPEM in the Cisco cBR Chassis 79
Installing the Power Module in the Cisco cBR Chassis 81
Connecting Power to the AC-Powered Cisco cBR Chassis 84
Connecting Power to the DC-Powered Cisco cBR Chassis 85
Installing the Supervisor in the Cisco cBR Chassis 89
CHAPTER 6
Installing the Supervisor 160G 89
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Installing the Supervisor PIC in the Cisco cBR Chassis 89
Installing the Supervisor PIC Cable Management Bracket 91
Installing the SFP+ Modules in the Supervisor PIC 92
Installing the Supervisor Card in the Cisco cBR Chassis 94
Using the SFP+ Ports on the Supervisor PIC 97
Using the DTI Ports on the Supervisor PIC 98
Using the NME Ports on the Supervisor PIC 99
Using the Console Port on the Supervisor PIC 99
Using the Auxiliary Port on the Supervisor PIC 101
Cable Management for the Supervisor PIC in the Cisco cBR Chassis 102
Using the USB Port on the Supervisor Card 106
Using the Console Port on the Supervisor Card 107
Installing the Supervisor 250G 109
Installing the Supervisor PIC in the Cisco cBR Chassis 109
Installing the Supervisor PIC Cable Management Bracket 111
Installing the QSFP+ or QSFP28 Transceiver Modules in the Supervisor PIC 112
Installing the Supervisor Card in the Cisco cBR Chassis 115
Attaching the Optical Network Cable 119
Using the DTI Ports on the Supervisor PIC 120
Using the NME Ports on the Supervisor PIC 121
Using the Console Port on the Supervisor PIC 121
Using the Auxiliary Port on the Supervisor PIC 123
Cable Management for the Supervisor PIC in the Cisco cBR Chassis 124
Using the USB Port on the Supervisor Card 129
Using the Console Port on the Supervisor Card 130
Swap Supervisor 160G to Supervisor 250G 10GE Mode 132
Backup the Configuration and IOS Code 132
Swap the Supervisor 133
Upgrade Supervisor 160G to Supervisor 250G 100GE Mode 135
Backup the Configuration and IOS Code 135
Swap the Supervisor 137
Installing the Interface Line and PIC Cards 141
CHAPTER 7
Installing the DOCSIS MAC/PHY Interface and PIC Card 141
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Installing RF PIC in the Cisco cBR Chassis 141
Using UCH.8 Connectors on the RF Through PIC 144
Installing the DOCSIS MAC/PHY Interface Line Card in the Cisco cBR Chassis 145
Installing the DOCSIS MAC Interface and PIC Card 150
Installing Digital PIC in the Cisco cBR Chassis 150
Installing the DOCSIS MAC Interface Line Card in the Cisco cBR Chassis 152
Powering Up the Cisco cBR Chassis 159
CHAPTER 8
Powering Up the Cisco cBR 159
Monitoring the Cisco cBR Chassis 161
CHAPTER 9
Monitoring the Cisco cBR Chassis Using CLI 161
Monitoring the Fan Module in Cisco cBR 169
CHAPTER 10
Monitoring the Fan Module on the Cisco cBR using LEDs 169
Monitoring the Fan Module using CLI in the Cisco cBR Chassis 170
Monitoring the Power System in the Cisco cBR Chassis 171
CHAPTER 11
Monitoring the Power System in the Cisco cBR Chassis Using LEDs 171
Monitoring the Power System in the Cisco cBR Chassis Using CLI 173
Monitoring the Supervisor in the Cisco cBR Chassis 175
CHAPTER 12
Monitoring the Supervisor 160G in the Cisco cBR Chassis Using LEDs 176
Monitoring the Supervisor 250G in the Cisco cBR Chassis Using LEDs 179
Monitoring the Interface Card in the Cisco cBR Chassis 183
CHAPTER 13
Monitoring the Interface Line Cards in the Cisco cBR Chassis using LEDs 183
Monitoring the Digital Physical Interface Cards in the Cisco cBR Chassis using LEDs 184
Maintaining the Cisco cBR Chassis 185
CHAPTER 14
Powering Down the Cisco cBR Chassis 185
Unmounting the Cisco cBR Chassis 185
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Maintaining the Fan Module for Cisco cBR 187
CHAPTER 15
Removing the Fan Module from the Cisco cBR Chassis 187
Maintaining the Power System in the Cisco cBR Chassis 189
CHAPTER 16
Removing the AC Power Connections from the Cisco cBR Chassis 189
Removing the DC Power Connections from the Cisco cBR Chassis 190
Removing the Power Module from the Cisco cBR Chassis 191
Removing the FPEM from the Cisco cBR Chassis 193
Removing the Power Cassette Module from the Cisco cBR Chassis 195
Maintaining the Supervisor in the Cisco cBR Chassis 199
CHAPTER 17
Maintaining the Supervisor 160G 199
Removing the Supervisor Card from the Cisco cBR Chassis 199
Removing the SFP+ Module from the Supervisor PIC 202
Removing the Supervisor PIC Cable Management Bracket 203
Removing the Supervisor PIC from the Cisco cBR Chassis 204
Maintaining the Supervisor 250G 207
Removing the Supervisor Card from the Cisco cBR Chassis 207
Removing the QSFP+ or QSFP28 Transceiver Module from the Supervisor PIC 210
Removing the Supervisor PIC Cable Management Bracket 211
Removing the Supervisor PIC from the Cisco cBR Chassis 212
Maintaining the Interface Cards in the Cisco cBR Chassis 215
CHAPTER 18
Maintaining the DOCSIS MAC/PHY Interface and PIC Card 215
Removing the DOCSIS MAC/PHY Interface Line Card from the Cisco cBR Chassis 215
Removing the UCH.8 Connectors from the RF PIC 217
Removing the RF PIC from the Cisco cBR Chassis 218
Removing the cLGA Connector from an Interface Line Card 219
Installing the cLGA Connector on the Line Card PCB 222
Maintaining the DOCSIS MAC Interface and PIC Card 223
Removing the DOCSIS MAC Interface Line Card from the Cisco cBR Chassis 223
Removing the Digital PIC from the Cisco cBR Chassis 225
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Maintaining the PHY Modules in the Cisco cBR Chassis 229
CHAPTER 19
Removing the Downstream PHY Module in the Interface Line Card 229
Installing the Downstream PHY Module in the Interface Line Card 231
Removing the Upstream PHY Module in the Interface Line Card 232
Installing the Upstream PHY Module in the Interface Line Card 234
Maintaining the Air Filter in the Cisco cBR Chassis 235
CHAPTER 20
Removing the Air Filter on a Card 235
Installing the Air Filter on a Card 237
Online Insertion and Removal of Cards on the Cisco cBR 249
CHAPTER 21
About OIR 249
What Does an OIR Do? 249
Guidelines for Performing an OIR 250
OIR on Cisco cBR 250
How Do I Perform an OIR? 250
Verifying Status after an OIR 251
Troubleshooting the Cisco cBR 255
CHAPTER 22
Troubleshooting the Fan Module in the Cisco cBR 255
Troubleshooting the Power System in the Cisco cBR 257
Troubleshooting the Interface Cards in Cisco cBR Chassis 257
General Troubleshooting 259
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Contents

CHAPTER 1
What is a Cisco cBR Series Converged
Broadband Router
•Introduction, on page 1
•Functional Overview, on page 2
•Cisco cBR-8 Converged Broadband Router, on page 4
•Supervisor, on page 15
•Interface Cards, on page 25
•Power System, on page 33
•Fan Module, on page 39
•Air Filter, on page 41
•Cisco IOS-XE Software, on page 41
•NEBS Level 3 Compliance, on page 42
•How and What to Order, on page 42
Introduction
The Cisco cBR Series Converged Broadband Router (Cisco cBR) is an Edge Services platform designed for
cable MSOs. It supports the RF and Data-over-Cable Service Interface Specifications (DOCSIS) interfaces
of a Cable Modem Termination System (CMTS) and digital optical interfaces such as Passive Optical Networks
(PON) and point-to-point Ten Gigabit Ethernet.
The Cisco cBR supports video including both traditional MPEG video and Video over IP over DOCSIS
(VDOC). The advantage of Cisco cBR is the ability to support MPEG video and VDOC in the same platform
allowing transition from MPEG to VDOC. The Cisco cBR is a single device that manages the entire RF
spectrum of the cable plant.
The Cisco cBR provides high-speed data, broadband, and IP telephony services to residential and commercial
subscribers using cable modems or digital set-top boxes (STBs). It supports data and digitized voice connectivity
over a bidirectional cable television and IP backbone network. And uses advanced quality of service (QoS)
techniques to ensure that real-time traffic such as voice can be reliably delivered, while still transmitting other
traffic on a best-effort basis.
The Cisco cBR concentrates traffic from two-way DOCSIS-based cable modems and STBs that is transmitted
over the coaxial cable television (CATV) network, and presents that traffic to local and remote Internet Protocol
(IP) hosts over its high-speed network uplink interfaces.
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The Cisco cBR runs on the Cisco IOS-XE networking software and supports the most advanced networking
and routing options.
Functional Overview
The Cisco cBR provides the following network solutions:
• High speed data access over DOCSIS
• Video over DOCSIS
• Voice services over DOCSIS
• Business services over DOCSIS
• MPEG transport-based video distribution
• Videoscape management system integration
• Data plane optimization to carry ABR traffic including monitoring of quality of service
• Assistance with the support of legacy devices in a Videoscape environment
• Video cache integration
The path from the Cisco CMTS to the cable modem or STB is the downstream, which carries the majority of
traffic over the cable interface.
The path from the cable modem or STB to the Cisco CMTS is the upstream, and it carries approximately 10
percent of the traffic that is sent over the downstream.
A large number of users can be assigned to the same downstream, and for efficient use of bandwidth, those
users can be split among several different upstream.
The following sections contain information about:
Upstream Data Path
The following example describes the upstream data path.
1. A request for service is generated by a subscriber. The modem transmits the request as a series of packets
to the Cisco CMTS on the upstream.
2. The cable line card receives the packets on its upstream interface and forwards them to its onboard
processor.
3. The line card processor verifies the header check sequence (HCS), frame check sequence (FCS), and
system identification number (SID), processes all fields in the DOCSIS MAC header, and then removes
the header.
1. The line card examines and processes the extended headers (Request, Acknowledgment, Privacy,
PHSs and Unsolicited Grand Synchronization header elements). If Baseline Privacy Interface (BPI)
is used, the processor also decrypts the Privacy EH frames using the appropriate key.
2. Bandwidth requests, acknowledgment (ACK) requests, and unsolicited grant syncs are reformatted
and passed to the request ring of the Cisco cable line card.
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What is a Cisco cBR Series Converged Broadband Router
Functional Overview

3. The DOCSIS MAC header is removed and another header is added, which includes the SID, the
upstream port information, and status bits that indicate whether any errors were detected.
4. The packet is sent across the backplane to the forwarding processor (FP) or the routing processor (RP)
on the route processor.
5. The route processor performs packet operations such as access list processing, classification, switching,
and QoS. It is also where major routing and IOS management functions (filtering) are run.
6. The packet is moved to the correct output queue and transmitted over the backplane to the network uplink
card (Ten Gigabit Ethernet) or another cable interface line card.
7. The output card forwards the packet to the next interface point.
Downstream Data Path
The following example describes the downstream data path.
1. Data packets from the Internet are received by the network uplink cards (Ten Gigabit Ethernet).
2. The packets are forwarded to the forwarding processor (FP) on the Supervisor module.
3. The FP performs MAC classification to determine the type of frame or packet to be processed.
4. The route processor performs access list filtering, policing, and marking.
5. The route processor performs a forwarding information base (FIB) lookup and rewrite.
1. The rewrite consists of a downstream header and 802.3 MAC header.
2. The downstream header contains destination primary SID, physical DS port number, PHS rule index,
and some control bits and other fields.
3. The packet is policed, shaped, and prepared for queueing. Queueing is based on the priority of the
queue and the state of the flow bits from the card. The destination card address (port) is pre-appended
on the header of the packet being transmitted.
6. The packet is transmitted over the backplane to the appropriate cable interface line card.
7. The cable interface line card receives the packet and forwards it to all the ASICs on the line card.
1. Each ASIC decodes the header to determine if the packet is destined for one of the downstream ports
on that card. If so, the downstream header is removed and the 802.3 MAC header is saved.
2. The MAC header is processed to determine how to build the DOCSIS MAC header and what operations
to perform on the packet. These might include pre-appending the DOCSIS MAC header, computing
the HCS and FCS, performing Packet Header Suppression, and BPI encryption.
8. After the packet is ready, it is immediately transmitted on the downstream.
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What is a Cisco cBR Series Converged Broadband Router
Downstream Data Path

Cisco cBR-8 Converged Broadband Router
The Cisco cBR-8 Converged Broadband Router (Cisco cBR-8) is a 13 rack unit (RU) chassis. It supports
multiple card modules and is designed with back-to-back midplanes; a front facing Digital Midplane and a
rear facing RF Midplane.
The front card modules plug into the Digital Midplane and the associated Physical Interface Card (PIC) plugs
into the rear of the chassis. All permanent connections to the Cisco cBR-8 chassis are made at the rear.
Figure 1: Chassis Front View
Front Power Entry Bezel3Line Cards1
Supervisor Cards2
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What is a Cisco cBR Series Converged Broadband Router
Cisco cBR-8 Converged Broadband Router

Figure 2: Chassis Rear View with AC FPEM
Lifting Handle4Line Card PIC1
AC FPEM5Supervisor PIC2
Fan Module3
Figure 3: Chassis Rear View with DC FPEM
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What is a Cisco cBR Series Converged Broadband Router
Cisco cBR-8 Converged Broadband Router

Lifting Handle4Line Card PIC1
DC FPEM5Supervisor PIC2
Fan Module3
The Cisco cBR-8 chassis supports:
• Two Supervisor Cards
• Two Supervisor PICs
• Eight Cisco cBR line cards
• Eight Cisco cBR RF PIC cards (seven when the chassis is configured in protect mode) or Eight Cisco
cBR DPIC cards (if -R line cards are installed)
• One Cisco cBR RF PROT PIC card (if the chassis is configured in RF protect mode)
• Six DC Power Modules with redundant input feeds or six AC Power Modules
• One Cisco cBR DC FPEM or one Cisco cBR AC FPEM
• Five Fan Modules
Physical Description
Table 1: Cisco cBR-8 Chassis Physical Description Summary
DescriptionParameter
13RU (22.75 in./57.78 cm)Height
17.45 in. (44.32 cm) without rack mounts
17.65 in. (44.83 cm) with rack mounts
Width
28.075 in. (71.3 cm)Overall Depth
429 lb (195 kg) maximum fully loadedWeight
Front-to-backAirflow
Cisco cBR-8 Chassis Dimensions
The below image shows the basic dimensions of the Cisco cBR-8 chassis.
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Physical Description

Figure 4: Basic Dimension
The below image shows the overall dimensions of the Cisco cBR-8 chassis with optional cable management
and rear door cable protection.
Figure 5: Overall Dimension
Cisco cBR-8 Chassis Features
Digital Midplane
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Physical Description

The Digital Midplane provides connectivity between various components in the chassis. It provides the
interconnect between the supervisors and all the interface slots. This interconnect includes differential pairs
used for ESI data plan links, Gigabit Ethernet/Ten Gigabit Ethernet control plane links, timing and single-ended
signals used for status and control functions. It also has connections for status and control of PICs, the power
shelf, and the fan modules.
RF Midplane
The RF midplane interconnects all RF-capable slots to allow backup RF line cards to send and receive RF
signals to and from an active RF line card PIC. It is designed to support a maximum of 24 RF ports on a PIC
with all ports carrying signals with frequency content up to 1.2 GHz. It supports downstream, upstream, and
a mixture of both.
Rear Door (Optional)
The rear door provides protection to the PIC cables.
Lifting Handles
The Cisco cBR-8 chassis has four handles available for lifting. It is recommended to remove all circuit cards
before attempting to install the chassis in a rack, but at a minimum, the front Supervisors and line cards should
be removed before lifting the chassis with the available handles.
The accessory kit that ships with the chassis includes rack mount rails. These can be pre-assembled in the
rack to help slide the chassis into place. An optional front mounted lifting handle is also available to help with
chassis installation.
Rear Cable Connectivity
All permanent facility cabling is on the rear of the chassis. Connectors on the PICs provide connectivity to
the front mounted Supervisors and line cards.
Front Side LED and Temporary I/O Locations
The LEDs are situated at the lower middle area on all the front mounted cards. Temporary I/O connectivity
ports are available on the left side of the Supervisor Card behind a removable door in the ejector handle.
Slot Numbering—Physical and Logical
Table 2: Physical Slot Numbering on the Cisco cBR-8 Router
Slot NumberingComponent
Identified by a two number system. The numbers are separated by a
forward slash.
• The first number indicates the slot number (starting with 0 for
the first slot at the top).
• The second number indicates the side of the chassis. That is, 0
is for front-mounted cards and 1 is for rear-mounted cards.
However, on Cisco IOS-XE, the show platform command does
not show the second number 0 for front-mounted cards.
Front and Rear Circuit Cards
Identified as SUP0 and SUP1.Supervisor Cards
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Slot Numbering—Physical and Logical

Slot NumberingComponent
Numbered from P0 to P5 and these map to the facility power outlet
markings on the rear of the chassis.
Power Supply Modules
Numbered from P10 (the top fan module slot) to P14 (the bottom fan
module slot).
Fan Modules
Figure 6: Slot Numbering—Front of the Chassis With AC Power Module
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Slot Numbering—Physical and Logical

Figure 7: Slot Numbering—Front of the Chassis With DC Power Module
Figure 8: Slot Numbering—Rear of the Chassis With AC Power Module
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Slot Numbering—Physical and Logical

Figure 9: Slot Numbering—Rear of the Chassis With DC Power Module
Table 3: Logical Slot Numbering on the Cisco cBR-8 Router
Valid Range/ValuesDescriptionComponentVariable
Release—Cisco IOS-XE Release 3.15.0S
0 to 3 and 6 to 9Slot where the interface card
resides.
Interface card
Slot
4 or 5Slot where the Supervisor
card resides.
Supervisor card
0
Secondary slot where the
interface card resides.
Interface card
Subslot
1Secondary slot where the
Supervisor card resides.
Supervisor card
0 to 7
Downstream controller port
on the interface card.
Interface card
(downstream)
Port
0 to 15Upstream controller port on
the interface card.
Interface card
(upstream)
0 to 7 (For Ten Gigabit Ethernet
ports)
Controller port on the
Supervisor card.
Supervisor card
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Slot Numbering—Physical and Logical

Valid Range/ValuesDescriptionComponentVariable
0 to 15
MAC domain index of the
interface card.
Interface card
cable-interface-index
NANANA
logical-channel-index
0 to 159RF channel number on the
interface card.
Interface card
(downstream)
rf-channel
0 to 11RF channel number on the
interface card.
Interface card
(upstream)
NARF channel number on the
Supervisor card.
Supervisor card
0 to 63
Wideband channel number on
the interface card.
Interface card
wideband-channel
NAWideband channel number on
the Supervisor card.
Supervisor card
Field Replaceable Units
Table 4: Cisco cBR-8 Chassis Modules and their Function
Function DescriptionHardware Module
The route and forwarding processor of the system and
includes integrated backhaul capability.
Supervisor (SUP)
Provides the supervisor physical interface to the
facility located on these cards.
Supervisor PIC
Provides the service side functionality such as
DOCSIS, Edge QAM, EPON, or other service blades.
Subscriber Side Interface Card (SSI Card)
Provides the physical interface to the facility for the
SSI Cards.
SSI PIC
Provide power conversion, filtering, and conditioning
from facility input power to the required -52V
midplane power that is used within the chassis.
There are specific AC and DC modules depending on
the facility input voltage. The power modules provide
their own cooling using internal fans.
Power Modules (AC or DC)
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What is a Cisco cBR Series Converged Broadband Router
Field Replaceable Units