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What is a Cisco cBR
Series Converged Broadband Router
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.
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.
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.
The cable line
card receives the packets on its upstream interface and forwards them to its
onboard processor.
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.
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.
Bandwidth
requests, acknowledgment (ACK) requests, and unsolicited grant syncs are
reformatted and passed to the request ring of the Cisco cable line card.
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.
The packet is sent
across the backplane to the forwarding processor (FP) or the routing processor
(RP) on the route processor.
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.
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.
The output card
forwards the packet to the next interface point.
Downstream Data
Path
The following example
describes the downstream data path.
Data packets from
the Internet are received by the network uplink cards (Ten Gigabit Ethernet).
The packets are
forwarded to the forwarding processor (FP) on the Supervisor module.
The FP performs
MAC classification to determine the type of frame or packet to be processed.
The route
processor performs access list filtering, policing, and marking.
The route
processor performs a forwarding information base (FIB) lookup and rewrite.
The rewrite
consists of a downstream header and 802.3 MAC header.
The downstream
header contains destination primary SID, physical DS port number, PHS rule
index, and some control bits and other fields.
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.
The packet is
transmitted over the backplane to the appropriate cable interface line card.
The cable
interface line card receives the packet and forwards it to all the ASICs on the
line card.
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.
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.
After the packet
is ready, it is immediately transmitted on the downstream.
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.
1
Line Cards
3
Front
Power Entry Bezel
2
Supervisor Cards
1
Line Card PIC
4
Lifting
Handle
2
Supervisor PIC
5
AC FPEM
3
Fan Module
1
Line Card PIC
4
Lifting
Handle
2
Supervisor PIC
5
DC FPEM
3
Fan Module
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
The below image
shows the basic dimensions of the
Cisco cBR-8 chassis.
The below image
shows the overall dimensions of the
Cisco cBR-8 chassis with
optional cable management and rear door cable protection.
Cisco cBR-8
Chassis Features
Digital Midplane
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
Component
Slot
Numbering
Front and
Rear Circuit Cards
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.
Supervisor
Cards
Identified
as SUP0 and SUP1.
Power Supply
Modules
Numbered
from P0 to P5 and these map to the facility power outlet markings on the rear
of the chassis.
Fan Modules
Numbered
from P10 (the top fan module slot) to P14 (the bottom fan module slot).
Table 3. Logical Slot
Numbering on the Cisco cBR-8 Router
Variable
Component
Description
Valid
Range/Values
Release—Cisco IOS-XE Release 3.15.0S
Slot
Interface
card
Slot where
the interface card resides.
0 to 3 and
6 to 9
Supervisor
card
Slot where
the Supervisor card resides.
4 or 5
Subslot
Interface
card
Secondary
slot where the interface card resides.
0
Supervisor
card
Secondary
slot where the Supervisor card resides.
1
Port
Interface
card (downstream)
Downstream
controller port on the interface card.
0 to 7
Interface
card (upstream)
Upstream
controller port on the interface card.
0 to 15
Supervisor
card
Controller
port on the Supervisor card.
0 to 7
(For Ten Gigabit Ethernet ports)
cable-interface-index
Interface
card
MAC domain
index of the interface card.
0 to 15
logical-channel-index
NA
NA
NA
rf-channel
Interface
card (downstream)
RF channel
number on the interface card.
0 to 159
Interface
card (upstream)
RF channel
number on the interface card.
0 to 11
Supervisor
card
RF channel
number on the Supervisor card.
NA
wideband-channel
Interface
card
Wideband
channel number on the interface card.
0 to 63
Supervisor
card
Wideband
channel number on the Supervisor card.
NA
Field Replaceable
Units
Table 4. Cisco cBR-8 Chassis
Modules and their Function
Hardware
Module
Function
Description
Supervisor (SUP)
The route
and forwarding processor of the system and includes integrated backhaul
capability.
Supervisor PIC
Provides the
supervisor physical interface to the facility located on these cards.
Subscriber Side Interface Card (SSI Card)
Provides the
service side functionality such as DOCSIS, Edge QAM, EPON, or other service
blades.
SSI PIC
Provides the
physical interface to the facility for the
SSI Cards.
Power
Modules (AC or DC)
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.
Facility
Power Entry Module (FPEM) (AC/DC)
Provides the
physical hookup interface and interconnection to the power modules for either
the AC or DC input voltage. The digital communication from the power modules to
the digital midplane; and the power interconnect from the power modules to the
midplane Bus Bar. This module is field replaceable to allow the facility to
change from AC to DC or DC to AC in the future without having to replace the
chassis.
Power Cassette Module
Provides the
physical support and keying for the power supply modules. It is keyed with a
corresponding
FPEM to determine
AC or DC support.
Fan Module
Provides
forced air cooling for the front and rear card slots.
Table 5. Card Slot Pitch
Definitions
Slot Type
Quantity and
Pitch
Supervisor Slots
2 in the
front of chassis on a 2.75” pitch
Supervisor PIC Slots
2 in the
rear of chassis on a 2.75” pitch
SSI Card Slots
8 in the front of chassis on a 1.48” pitch
SSI PIC
Slots
8 in the rear of chassis on a 1.48” pitch
Power Cassette Module
6 power
supply bays in the front of the chassis
Facility
Power Entry Module (FPEM) (AC/DC)
1 in the
bottom, rear of the chassis
Fan Module
5 in the
rear of the chassis on a 3.5” pitch
Table 6. Maximum Weight
for Cards and Modules
Module
Maximum
Weight
Supervisor Slots
26 lbs.
Supervisor PIC Slots
6 lbs.
SSI Card Slots
19 lbs.
NSI/SSI
Slots
19 lbs.
SSI PIC
Slots
5 lbs.
NSI/SSI
PIC Slots
5 lbs.
Power Cassette Module
6 lbs.
Power
Cassette (AC/DC)
17 lbs.
Facility
Power Entry Module (FPEM) (AC/DC)
15 lbs.
Fan Module
4 lbs.
13RU
Chassis Estimated Weight (with midplanes and Bus Bar)
The
Supervisor is the
processor of the
Cisco cBR. It consists
of a forward processor (FP) complex and route processor (RP) complex.
The FP complex performs data forwarding, baseline router packet operations including MAC classification, Layer 2 and the various
Layer 3 forwarding, QoS classification, security ACLs, VPNs, policing, shaping, load balancing, egress packet buffering, queueing,
and egress packet scheduling functions. The FP complex supports Network Address Translation (NAT), flexible pattern matching,
and tunneling protocols.
The RP complex
performs route processing,
Cisco cBR chassis
management, and runs the network operating system and its controls.
The
Supervisor supports:
Eight Ten
Gigabit Ethernet backhaul interfaces.
1+1 active/standby
redundancy.
Chassis
management of the
Cisco cBR including
activation and initialization of the other cards, selection and switch over of
the active and standby cards, image management and distribution, logging
facilities, distribution of user configuration information .
DOCSIS Timing
Interface (DTI) client and server ports.
Online insertion
and removal (OIR).
The
Supervisor consists of
the following field replaceable units (FRUs):
Supervisor Card
Supervisor physical
interface card (PIC)
The
Cisco cBR-8 supports:
Two 160G Supervisor Cards
Two 8x10G Supervisor PICs
Supervisor Card
The
Supervisor Card is the route
processor of the
Cisco cBR and includes
integrated backhaul capability. It is installed in the front of the
Cisco cBR chassis. The
plastic latch maintains the alignment of the spring-loaded ejector with the
faceplate. The
Supervisor Card has a tethered
door to allow access to the ports on its faceplate.
1
Spring-loaded ejector
5
LEDs
2
Tethered
I/O door
6
Support
rails
3
Plastic
latch
7
USB
ports
4
Removable air filter
8
Console
port
Table 9. Physical
Specifications of the
Supervisor Card
Unit
Value
Depth
20 in (50.8
cm)
Width
17.2 in
(43.68 cm)
Height
2.8 in
(7.11 cm)
Maximum
weight
26 lb
(11.79 kg)
Table 10. Ports on the
Supervisor Card
Port
Description
USB ports
The
Supervisor Card has two type-A
USB ports. These ports are used for connecting external memory sticks or flash
drives to load configurations.
Console port
The
Supervisor Card has one mini
type-B USB console port. This port is an asynchronous EIA/TIA-232 serial port
used to connect a terminal to the
Supervisor Card for local
administrative access.
Note
The ports on the
Supervisor Card are used for
temporary connections. For all permanent connections, including the console
connection, you must use the ports on the
Supervisor PIC installed in
the rear of the chassis.
The
Supervisor Card has the
following LEDs:
LED
Description
PWR STAT
Power
status LED
RP STAT
RP
status LED
RP ACT
RP
active LED
FP STAT
FP
status LED
FP ACT
FP
active LED
INSI ACT
iNSI
active LED
ALRM
Alarm
LED
RPLC
Replace
LED
The router
supports the following
Supervisor Cards:
CBR-CCAP-SUP-60G—Supervisor Card with 60 Gbps
forwarding capacity. It supports a maximum of four interface cards, working in
3+1 protection mode, on the
Cisco cBR-8 router. It
supports a maximum of 72268 unicast flows or 88268 modular quality of service
(MQoS) flows. The maximum number of unicast and MQoS flows supported is 88268.
Note
If you are
using the CBR-CCAP-SUP-60G
Supervisor Card
in Cisco IOS-XE Release 3.15.0S, the output of the
show
inventory command displays the CBR-CCAP-SUP-160G PID instead of
the CBR-CCAP-SUP-60G PID.
CBR-CCAP-SUP-160G—Supervisor Card with 160 Gbps
forwarding capacity. It supports a maximum of eight interface cards, working in
N+1 protection mode, on the
Cisco cBR-8 router.
Important
Different
Supervisor Cards cannot
coexist on a
Cisco cBR-8 router. We
recommend that you install the
Supervisor Cards with the same
capacity in the chassis to ensure proper redundancy support.
Supervisor PIC
The
Supervisor PIC provides the
physical interface to the
Supervisor Card. It is
installed in the rear of the
Cisco cBR chassis.
1
Ejector
lever
7
NME
ports
2
Timing
port (1 PPS)
8
Console
port
3
Timing
port (10 MHz)
9
Auxiliary port
4
GPS port
10
Captive
screws
5
DTI
ports
11
LEDs
6
CM/DTP
port
12
SFP+
ports
Table 11. Physical
Specifications of the
Supervisor PIC
Unit
Value
Depth
7.82 in
(19.86 cm)
Width
11.8 in
(29.97 cm)
Height
2.8 in
(7.11 cm)
Maximum
weight
6 lb
(2.72 kg)
Table 12. Ports on the
Supervisor PIC
Port
Description
SFP+ ports
The
Supervisor PIC has eight Ten
Gigabit Ethernet SFP (SFP+) ports. These ports are used to connect it to the
switch or router. These ports provide backhaul connection to the WAN network.
Timing
ports
The
Supervisor PIC has two timing
ports, 1 PPS and 10 MHz ports, which are reserved for future use.
GPS port
The
Supervisor PIC has a GPS
port, which is reserved for future use.
DTI ports
The
Supervisor PIC has two DTI
ports. These ports are used for connecting to DTI server as a reference clock
source.
CM/DTP
port
The
Supervisor PIC has a CM/DTP
port, which is reserved for future use.
NME ports
The
Supervisor PIC has two NME
ports. These ports are the Gigabit Ethernet management ports. One port is used
for network management and is used to connect to a switch and the other port is
reserved for future use.
Console
port
The
Supervisor PIC has one RJ-45
console port. This port is an asynchronous EIA/TIA-232 serial port used to
connect a terminal to the
Supervisor PIC for local
administrative access.
Auxiliary
port
The
Supervisor PIC has one
auxiliary port. This port is used to connect a terminal server to the
Supervisor PIC for verifying
the system status.
The Cisco® cBR-8 Converged Cable Access Router Supervisor 250G perform the data forwarding and routing processing functions
of carrier-class and high performance cBR-8 Converged Cable Access Router. Not only does the supervisor provide advanced routing
capabilities, but it also monitors and manages other components in the Cisco® cBR-8 Converged Cable Access Router. The supervisor
consists of two FRU (Field Replaceable Unit): Supervisor and Supervisor PIC (Physical Interface Card). Supervisor PIC card
has all the physical interface ports and related PHY component on board.
As the management processor for the Cisco® cBR-8 Converged Cable Access Router, the supervisor also performs the following
management functions: chassis management including activation and initialization of the other cards, selection/switchover
of active vs. standby cards, image management and distribution, logging facilities, distribution of user configuration information,
monitor and manage the power and temperature of system components such as line cards, power supplies, and fans, provide out-of-band
system console and auxiliary ports, USB, and Ethernet ports for router configuration and maintenance etc. Supervisor works
together with SUP PIC offering below main features:
Provides up to 250Gbps Downstream and Upstream aggregated forwarding capacity
Flexible data path interconnection between active and standby supervisors to support a total of 2x100G worth of active-active
backhaul bandwidth
Integrate full range of industry-leading Cisco IOS® Software features and services
SSD memory (240G) for syslog/debug information/image/package storage
Run with the modular Cisco IOS XE Software for the Cisco® cBR-8 Converged Cable Access Router
Provide 1+1 redundant-supervisor support
Two Integrated 1x100G NSI (Network Side Interface) backhaul interfaces on Supervisor PIC. The interface can support either
QSFP28 or QSFP+ module
Two RJ45 GE network management ports are hardware capable of supporting Synchronous Ethernet
Offer field-replaceable and hot-swappable capabilities to help ensure minimal service disruption
The
Cisco cBR-8 supports:
Two 250G Supervisor Cards
Two 2x100G Supervisor PICs
Supervisor Card
The
Supervisor Card is the route
processor of the
Cisco cBR and includes
integrated backhaul capability. It is installed in the front of the
Cisco cBR chassis. The
plastic latch maintains the alignment of the spring-loaded ejector with the
faceplate. The
Supervisor Card has a tethered
door to allow access to the ports on its faceplate.
1
Spring-loaded ejector
5
LEDs
2
Tethered
I/O door
6
Support
rails
3
Plastic
latch
7
USB
ports
4
Removable air filter
8
Console
port
Table 13. Physical
Specifications of the
Supervisor Card
Unit
Value
Depth
19.98 in (50.7 cm)
Width
16.27 in (41.3 cm)
Height
2.82 in (7.16 cm)
Maximum
weight
26 lb (11.8 kg)
Table 14. Ports on the
Supervisor Card
Port
Description
USB ports
The
Supervisor Card has two type-A
USB ports. These ports are used for connecting external memory sticks or flash
drives to load configurations.
Console port
The
Supervisor Card has one mini
type-B USB console port. This port is an asynchronous EIA/TIA-232 serial port
used to connect a terminal to the
Supervisor Card for local
administrative access.
Note
The ports on the
Supervisor Card are used for
temporary connections. For all permanent connections, including the console
connection, you must use the ports on the
Supervisor PIC installed in
the rear of the chassis.
The
Supervisor Card has the
following LEDs:
LED
Description
PWR STAT
Power
status LED
RP STAT
RP
status LED
RP ACT
RP
active LED
FP STAT
FP
status LED
FP ACT
FP
active LED
INSI ACT
iNSI
active LED
ALRM
Alarm
LED
RPLC
Replace
LED
Important
Different
Supervisor Cards cannot
coexist on a
Cisco cBR-8 router. We
recommend that you install the
Supervisor Cards with the same
capacity in the chassis to ensure proper redundancy support.
Supervisor PIC
The
Supervisor PIC provides the
physical interface to the
Supervisor Card. It is
installed in the rear of the
Cisco cBR chassis.
1
Ejector
lever
8
Timing port (1 PPS)
2
QSFP ports
9
Timing port (10 MHz)
3
Auxiliary port
10
Console port
4
DTI ports
11
LEDs
5
NME ports
12
Captive screws
6
CM/DTP
port
13
10G LED
7
TOD port
Table 15. Physical
Specifications of the
Supervisor PIC
Unit
Value
Depth
8.1 in (20.6 cm)
Width
11.79 in (29.9 cm)
Height
2.82 in (7.16 cm)
Maximum
weight
3.44 lb (1.56 kg)
Table 16. Ports on the
Supervisor PIC
Port
Description
QSFP ports
The Supervisor PIC has two QSFP ports. These ports are used to connect it to the switch or router. These ports provide backhaul
connection to the WAN network.
Timing
ports
The
Supervisor PIC has two timing
ports, 1 PPS and 10 MHz ports, which are reserved for future use.
TOD port
The Supervisor PIC has a Time of Date (ToD) port.
DTI ports
The
Supervisor PIC has two DTI
ports. These ports are used for connecting to DTI server as a reference clock
source.
CM/DTP
port
The
Supervisor PIC has a CM/DTP
port, which is reserved for future use.
NME ports
The
Supervisor PIC has two NME
ports. These ports are the Gigabit Ethernet management ports. One port is used
for network management and is used to connect to a switch and the other port is
reserved for future use.
Console
port
The
Supervisor PIC has one RJ-45
console port. This port is an asynchronous EIA/TIA-232 serial port used to
connect a terminal to the
Supervisor PIC for local
administrative access.
Auxiliary
port
The
Supervisor PIC has one
auxiliary port. This port is used to connect a terminal server to the
Supervisor PIC for verifying
the system status.
The
Supervisor PIC has the
following LEDs:
LED
Description
PIC_STAT
Supervisor PIC status LED
INSI_ACT
iNSI
active LED
REPLACE
Replace
LED
SFP+
SFP+
module and link status LED
DTI
Normal
DTI
normal mode status LED
DTI Fast
DTI fast
mode status LED
NME Lnk
NME
module link status LED
NME Act
NME
module link active LED
SSD
SSD
access status LED
CM/DTP
Lnk
Reserved
for future use
CM/DTP
Act
Reserved
for future use
Interface
Cards
The Subscriber Side Interface (SSI) card (line card) provides the DOCSIS MAC/PHY or DOCSIS MAC function in the Cisco cBR router.
The front of the line card has spring-loaded ejectors with plastic latches, on both sides of the interface line card. The
plastic latch maintains the spring-loaded ejector's alignment with the faceplate.
The line cards
have perforated grill faceplate that allow air flow into the card. There is a
removable filter in the front panel of the line card. This filter filters the
air flowing into the chassis through the perforated grill faceplate.
All interface cards in the Cisco cBR-8 chassis are designed for High Availability (HA) with a N+1 redundancy scheme.
The Cisco cBR-8 supports the following interface cards:
Interface Line Card (SSI Card, DOCSIS MAC or DOCSIS MAC/PHY line card)—Provides the service side functionality such as DOCSIS, Edge QAM, EPON, or other
service blades.
RF Through PIC or Digital Through PIC—Connects to the interface line card. This PIC provides the physical interface to the
facility for the line card.
RF Protect PIC or Digital Protect PIC—Provides connection of the redundant line card to the appropriate Through PIC.
Interface Line
Card Blank
Apart from the
operational interface line cards, an interface line card blank (line card
blank) is installed in any empty unused line card slot, to ensure proper
airflow within the operational chassis.
PIC Blank
Apart from the operational PICs, a PIC blank is installed in any empty unused PIC slot, to ensure proper airflow within the
operational chassis.
Protect
Zone
To configure N+1 RF redundancy, the interface line card installed in the uppermost slot is configured as the Protect line
card with the Protect PIC installed in the corresponding PIC slot. The working line cards and the Through PIC cards installed
successively below the Protect line card and PIC card form a Protect Zone. The following are the restrictions for the Protect
Zone:
Each protect zone has one Protect PIC card at the top with a set of Through PIC cards installed successively below the protect
line card.
A PIC card blank should not be installed within a protect zone. It is not necessary to have a line card in every slot of a
protect zone.
If another line card is configured as a Protect line card, then it forms a separate Protect Zone with the successive working
line cards below it.
Every Protect line card must have an Protect PIC installed in the corresponding PIC slot in the rear of the chassis.
The Downstream D3.1 module has a green label on it.
The following limitations are applicable to the downstream PHY modules:
All interface line cards in the chassis must have the same downstream PHY module version; that is all D3.0 or D3.1 modules.
In an interface line card, both the downstream PHY modules must be the same version; that is both D3.0 or both D3.1 modules.
The downstream D3.1 modules are supported only with the Cisco IOS-XE Release 3.16.0S and later releases.
If the downstream D3.1 modules are installed with the Cisco IOS-XE Release 3.15.0S, the downstream D3.1 modules will boot
up, but not function properly.
With the Cisco IOS-XE Release 3.16.0S, the downstream D3.1 module provides operational readiness for the implementation of
DOCSIS 3.1 functions and features.
Upstream PHY Module
Each interface line card supports one upstream PHY module. The Cisco cBR chassis supports the following upstream PHY module versions:
The following limitations are applicable to the upstream PHY modules:
All interface line cards in the chassis must have the same upstream PHY module version; that is all D3.0 or D3.1 modules.
The upstream D3.1 module is supported only with the Cisco IOS-XE Release 3.18.0S and later releases.
If the upstream D3.1 modules are installed with the Cisco IOS-XE Release 3.17.0S, the upstream D3.1 modules will boot up,
but not function properly.
With the Cisco IOS-XE Release 3.18.0S, the upstream D3.1 module provides operational readiness for the implementation of DOCSIS
3.1 functions and features.
RF PICs
The RF PICs are installed into the rear of the Cisco cBR chassis.
The RF PICs support the PHY and RF interface connections for the interface line cards. The following are the two types of
RF PICs used in the Cisco cBR chassis:
RF Through PIC
RF Protect PIC
RF Through PIC
The RF Through PIC connects to the line cards on the digital and RF midplanes, and provides downstream and upstream physical
connectivity. It connects to the DOCSIS MAC/PHY line card.
1
Downstream ports DS0 to DS7
4
LEDs
2
Upstream ports US0 to US7 and US8 to US15
5
Product Identifier (PID)
3
Ejector Lever
Table 19. Physical Specifications of the RF PICs
Unit
Value
Depth
7.8 in (19.8 cm)
Width
11.8 in (30 cm)
Height
1.5 inch (3.8 cm)
Maximum Weight
5 lbs (2.26 kg)
The RF Through PIC has the following ports:
Ports
Description
DS0 to DS7
The RF Through PIC has eight 50-1200 MHz RF connector ports that provide downstream channel connectivity.
US0 to US7 and
US8 to US15
The RF Through PIC has sixteen 5-204 MHz RF connector ports that provide upstream channel connectivity.
The RF PICs have the following LEDs:
LED
Description
STATUS
Status of the card.
PROTECT
Protect configuration status of the card.
REPLACE
Indicates if the card must be replaced.
RF Protect PIC
The RF Protect PIC provides redundancy support for the N+1 high availability features, to the RF Through PICs in the chassis.
It has only the LEDs on its faceplate. It does not have the downstream and upstream ports.
DOCSIS MAC Cards
A DOCSIS MAC line card is paired with an Digital Interface Card (DPIC).
Digital Interface Line Cards
The Cisco cBR chassis supports the following Digital Interface Line Cards:
DOCSIS MAC SSI Card (40Gbps). [PID: CBR-CCAP-LC-40G-R]
DOCSIS MAC SSI Card (80Gbps). [PID: CBR-CCAP-LC-G2-R]
Digital PICs
The Cisco Digital Physical Interface Card (DPIC) is used to connect a cBR-8 DOCSIS MAC Line card to an external Remote PHY
Node Device (RPD) or Remote PHY Shelf product.
The DPIC is installed in the cBR-8 and connects to a RPD node/shelf via Metro Ethernet. It supports both downstream and upstream
traffic.
The Cisco cBR chassis supports the following Digital PICs:
cBR CCAP Digital Through PIC. [PID: cBR-DPIC-8X10G]
cBR-8 2x100G Digital Physical Interface Card. [PID: cBR-DPIC-2X100G]
cBR CCAP Digital Through PIC
Table 20. Physical Specifications of the DPIC
Unit
Dimensions
Width
10.96 in (27.8cm)
Height
1.43 in (3.6cm)
Depth
7.32 in (18.6cm) with handle
Weight
2.943lb (1.335kg)
The DPIC supports:
Eight ten gigabit Ethernet SFP+ interfaces
80 gigabit non-blocking switching architecture with 40+40 protection scheme
Backward compatible with SUP-60, SUP-160 and SUP-250
The faceplate of the 2x100G DPIC has the following:
Optic Cable Clip—Helps route and manage the optic cables.
2x QSFP ports—Used as 1 x 100GE or 8 x 10GE interfaces.
Link Status LED—Indicates the status of the link. QSFP0 port is mapped to LED 0,2,4,6 if it works in 10GE mode and mapped
to LED 0 if works in 100GE mode. QSFP1 port is mapped to LED 1,3,5,7 if it works in 10GE mode and mapped to LED 1 if works
in 100GE mode.
Status LED—Indicates the status of the 2x100G DPIC.
Replace LED—Indicates the 2x100G DPIC must be replaced.
Note
If the QSFP-100G-SM-SR module is used in the DPIC 100G card, the cBR-8 router chassis ambient temperature must be limited
to 50ÂşC at sea level.
Power System
The
Cisco cBR chassis is
powered using AC or DC power inputs. The power system consists of the following
modules:
Power Cassette Module
AC or DC Facility
Power Entry Modules (FPEM)
AC or DC
Power Modules
The
Cisco cBR power system
supports:
Load sharing
between the
Power Modules
N+1 redundancy for
the DC power systems, and N+1 or 1+1 redundancy for the AC power systems
Online Insertion
and Removal (OIR)
The
Cisco cBR-8 Converged Broadband Router (cBR-8)
supports:
One
Power Cassette Module
One
FPEM
Six
Power Modules
Redundancy
For the
DC-powered
Cisco cBR with N+1
redundancy, the chassis must have at least five operational
DC Power Modules to be
functional.
Note
The
DC-powered
Cisco cBR allows A and B
inputs to each
DC Power Module to support
separate A and B facility feeds. However, only one feed is necessary to support
full power operation.
For the
AC-powered
Cisco cBR with N+1
redundancy, the chassis must have at least four operational
AC Power Modules to be
functional.
For the
AC-powered
Cisco cBR with 1+1
redundancy, the chassis must have six operational
AC Power Modules to be
functional.
Power Cassette Module
The
Power Cassette Module provides the
physical support and keying for the
Power Modules. It is keyed
with a corresponding
FPEM to determine
AC or DC support.
This module is
installed in the front of the
Cisco cBR chassis.
1
Mounting
flange
2
AC Power Module bay
1
Mounting
flange
2
DC Power Module bay
Table 22. Physical
Specifications of the
Power Cassette Module
Unit
Value
AC
Power Cassette Module
Depth
16.9 in
(42.92 cm)
Width
17.3 in
(43.94 cm)
Height
3.7 in (9.4
cm)
Maximum
weight
17 lb (7.7
kg)
DC
Power Cassette Module
Depth
16.9 in
(42.92 cm)
Width
17.3 in
(43.94 cm)
Height
3.7 in
(9.4 cm)
Maximum
weight
17 lb (7.7
kg)
The
Power Cassette Module supports six
Power Modules. The front
Power Module slots are
numbered from P0 to P5 on the
Power Cassette Module and these
designations map to the facility power outlet markings on the rear of the
chassis.
FPEM
The
FPEM provides the
following:
Physical
interface and interconnection to the
Power Modules for either AC
or DC input voltage.
Digital
communication from the
Power Modules to the
digital midplane.
Power
interconnection from the
Power Modules to the
midplane bus bar.
The
FPEM is installed
in the rear of the
Cisco cBR chassis. It is
field replaceable to allow the facility to change from AC to DC power, or vice
versa, without replacing the chassis.
Note
Starting from April, 2018, Cisco ships the cBR8 router with AC FPEM VER 02 with no AC PRESENT LEDs as shown in the figure.
VER 01 of AC FPEM has P0 AC PRESENT through P5 AC PRESENT that indicates input AC power for the corresponding AC Power Module
(also indicated on the front-side of the Power Module).
1
Mounting
flange
4
Power
Enable LED
2
Handle
5
AC power
input connector
3
Power
switch
1
Mounting
flange
6
Negative
lead
2
Handle
7
Positive
lead
3
Power
switch
8
Power
Enable LED
4
Terminal
block cover
9
DC
Present LED
5
Terminal
bolt
—
Table 23. Physical
Specifications of the
FPEM
Unit
Value
AC FPEM
Depth
10.08 in
(25.6 cm)
Width
17.45 in
(44.32 cm)
Height
3.85 in
(9.78 cm)
Maximum
weight
15 lb
(6.8 kg)
DC FPEM
Depth
10.08 in
(25.6 cm)
Width
17.45 in
(44.32 cm)
Height
3.85 in
(9.78 cm)
Maximum
weight
15 lb
(6.8 kg)
Both AC and DC
FPEMs have a power
switch to enable power to the entire
Cisco cBR chassis.
The AC FPEM has the following LED:
POWER
ENABLE—Power status LED
The
DC FPEM has the
following LEDs:
POWER
ENABLE—Power status LED
DC
PRESENT—Input DC power status LED for each terminal block
Power Module
The
Power Modules provide the
power conversion, filtering, and conditioning from facility input power to the
required -52 V midplane power that is used within the chassis. Both AC and DC
Power Modules are available
depending on the facility input voltage. These modules have internal fans for
cooling.
The
Power Modules are installed
in the front of the
Cisco cBR chassis.
1
Handle
2
Screw
1
Handle
2
Screw
Table 24. Physical
Specifications of the
Power Module
Unit
Value
AC Power Module
Depth
16.94 in
(43.02 cm)
Width
4 in
(10.16 cm)
Height
1.6 in
(4.06 cm)
Maximum
weight
6 lb (2.72
kg)
DC Power Module
Depth
16.94 in
(43.02 cm)
Width
4 in
(10.16 cm)
Height
1.6 in
(4.06 cm)
Maximum
weight
6 lb (2.72
kg)
Both AC and DC
Power Modules have the
following LEDs:
Input power
LED—Power input status LED
Output power
LED—Power output status LED
Fault
LED—Fault status LED
Fan Module
The
Cisco cBR-8 router has
multiple modular
Fan Modules installed in
the rear to supply cooling air and have five
Fan Module bays in the
rear of the chassis. The bays are numbered from P10 to P14.
1
Product
Identifier (PID)
5
Control
Panel
2
Front
Grille Panel
6
Rear Fan
3
Front
Fan
7
PID
label
4
LEDs
—
Each
Fan Module has two fans
and a control board. The fans in each
Fan Module are
synchronized and operate at variable speeds as set by the Supervisor. Fan
speeds are determined based on ambient temperature and pressure. When the
chassis boots up, the operating speed of the fans is set to the default number
of revolutions per minute (RPM) in unsupervised mode. The multi
Fan Module cooling
architecture permits only one fan failure at any time in any given
Fan Module during normal
operational conditions. All the remaining fans are capable of changing to full
speed operation to compensate for the failed fan or module.
Each fan bay has
one hinged rear door and one sliding side door which close when a
Fan Module is removed for
replacement. This prevents re-circulation of air which could lead to the system
overheating. The multi cooling architecture permits only one fan failure at any
time in any given during normal operational conditions. All the remaining fans
are capable of changing to full speed operation to compensate for the failed
fan or module.
Warning
Ensure that all
Fan Module bays have
functioning
Fan Modules. If a
Fan Module is removed,
replace it with a functioning
Fan Module within one
minute of the removal in order to avoid critical thermal alarms relating to
overheating of individual components.
Table 25. Physical
Specifications of the Fan Module
Unit
Value
Depth
8.40 in
(21.34 cm)
Width
5.20 in
(13.20 cm)
Height
3.50 in
(8.89 cm)
Weight
4 lbs
(1.81 kg)
The faceplate of
the
Fan Module has the
following LEDs:
LED
Description
STATUS 1
Status
of the rear fan that faces inside the chassis.
STATUS 2
Status
of the front fan that faces outside the chassis.
RPLC
Failure
and replacement status of the
Fan Module.
Cooling System of
the Cisco cBR Chassis
The
Fan Modules in the
Cisco cBR chassis are
controlled by the
Supervisor Card. Until the
Supervisor Card boots up, the
fans spin at default speed of 11000 RPM. After
Supervisor Card boot-up, the
Supervisor Card controls the
fan speeds, based on the temperature of the air entering the chassis and the
barometric pressure reported by the sensors in the
Fan Modules.
Failure
Responses and Fan Speed Variations
The fan module will
change speed based on the following conditions:
When communication with the
Supervisor Card is lost, both
the fans in the
Fan Module are set the
11,000 RPM default speed mode until communication is established. If the fans
were running above 11,000 RPM default when communication was lost, the fans
continue to operate at the elevated speeds until they are power cycled.
If a fan is considered to
have failed if it operates at +/- 1000rpm from the set point. All fans are
elevated in speed based on facility air inlet temperature to the
Supervisor Card as safety
measure, by a temperature sensor on the
Supervisor Card. The front
panel LED of the
Fan Module indicates an
amber color LED. If there is an indication of a fan failure the
Supervisor Card sets all the
fan modules to a higher RPM value based on the inlet temperature on the
Supervisor Card. The
Supervisor Card sets the
following values:
13,000RPM
(194CFM) for T≤30C
14,500RPM
(218 CFM) for 30<T≤ 40C
16,000RPM
(239 CFM) for T>40C
If there are more than 2 fan failures, the speed of the
remaining fans automatically default to 16,000 RPM.
A fan operating at speeds
between 301 and 999 RPM from the set point, is considered a minor fan alarm.
The fan speeds are not elevated in case of a minor alarm. The
Fan Module amber LED is
illuminated.
When the chassis is booted
and a fan is missing or removed the
Supervisor Card sets all the
other operational fans to 16,000 RPM. The chassis will not boot with a missing
Fan Module. When a
working
Fan Module is replaced
and all the other
Fan Modules are working
correctly the
Supervisor Card will return
all the fans to their normal operational speed. When a
Fan Module is initially
removed the
Supervisor Card sets all the
remaining fans to run at 13,000 RPM for 10 seconds, 14,500 RPM for 30 seconds,
ramping to 15,000RPM for the next 30 seconds and then ramping to 16,000RPM
until all the
Fan Modules are again
shown present.
Note
Variations in
speeds occur to regulate the internal component temperatures. Such speed
variations are normal, in the absence of any alarms. For more details, see Monitoring the Fan
Modules.
Air Filter
The air filter is a field replaceable unit on the Supervisor and RF line
cards. It removes dust in the air that is drawn into the router by the cooling
fans. We recommend that you examine the air filter at least once a month or
more often if required. Do not clean and re-use air filters. They must be
replaced when they are clogged or worn out.
Note
You can remove and install an air filter when the Cisco cBR router is
powered on and working.
Cisco IOS-XE
Software
The
Cisco cBR Series Converged Broadband Router
(Cisco cBR)
runs the Cisco IOS-XE software, which is stored on the Type II PCMCIA flash
memory disks stored in the two PCMCIA slots in the primary route processor
module. A PCMCIA flash memory disk in either slot can store a Cisco software
image or configuration file. In addition to the flash memory disks, each route
processor module contains onboard flash memory that is used to store a boot
loader. The loader executes following a system reset to reload and execute the
Cisco IOS-XE software on the flash memory disks.
The route processor
module also stores the system configuration in the onboard flash memory. The
configuration information read from the flash memory is buffered in operational
memory following initialization, and is written to the flash memory device when
the configuration is saved. Each line card also contains onboard flash memory
that is used to store a boot loader, similar in function to that used on the
route processor module. However, the line card loader executes following a
system reset, line card reset, or line card insertion to reload and execute any
code that must run on the line card. Software images may also be stored on an
external TFTP server. If the
Cisco cBR
is so configured, it then downloads the proper image from the TFTP server and
executes it.
NEBS Level 3
Compliance
The Cisco cBR is
designed to meet Network Equipment Building System (NEBS) Level 3 compliance.
How and What to
Order
Ordering
Information
Table 26. Ordering
Information for Cisco cBR-8 Router
Product
Description
Part
Number
Cisco cBR-8 Converged Cable
Access Chassis
cBR-8 CCAP
Chassis
CBR-8-CCAP-CHASS
AC Power Module
CBR-AC-PS
AC FPEM
CBR-PEM-AC-6M
AC
Power Cassette Module
CBR-AC-PWR-TRAY
DC Power Module
CBR-DC-PS
DC FPEM
CBR-PEM-DC-6M
DC
Power Cassette Module
CBR-DC-PWR-TRAY
Power Module Blanks (for
empty
Power Module bays)
CBR-PS-BLANK
Fan Module
CBR-FAN-ASSEMBLY
Chassis
Installation Handle (optional)
CBR-CHASSI-HANDLE=
Table 27. Ordering
Information for Cisco cBR-8 Router
Supervisor
Product
Description
Part Number
Cisco cBR-8 Supervisor
Modules
Supervisor for cBR series -250G
CBR-SUP-250G
Supervisor for cBR series -250G, SPARE
CBR-SUP-250G=
Supervisor with 200G forwarding capability as well as a robust and powerful control plane complex. It ships with 48 GB of memory.
CBR-CCAP-SUP-160G
Supervisor with 60G
forwarding capability. It does not have the DC board. It ships with 48 GB of
memory.
CBR-CCAP-SUP-60G
Supervisor 250 PIC, 2x100GE, 10GE with breakout cables
CBR-2X100G-PIC
Supervisor 250 PIC, 2x100GE, 10GE with breakout cables, SPARE
CBR-2X100G-PIC=
The
Supervisor PIC includes WAN
backhaul connectivity options.
CBR-SUP-8X10G-PIC
Bundle
PID for the 8x10G
Supervisor PIC.
CBR-8X10G-PIC-BUN
SFP+
SFP-10G-SR
SFP-10G-LR
SFP-10G-ER
SFP-10G-ZR
SFP-10G-LRM
SFP-10G-AOC3M=
100GBASE SR4 QSFP Transceiver, MPO, 100m over OM4 MMF
QSFP-100G-SR4-S
100GBASE LR4 QSFP Transceiver, LC, 10km over SMF
QSFP-100G-LR4-S
100GBASE QSFP Transceiver, 40 km reach over SMF, Duplex LC
QSFP-100G-ER4L-S
40GBASE-SR4 QSFP Transceiver Module with MPO Connector
QSFP-40G-SR4
QSFP 4x10G Transceiver Module, SM MPO, 10KM, Enterprise-Class
QSFP-4X10G-LR-S
100GBASE CWDM4 Lite QSFP Transceiver, 2km over SMF, 10-60C
QSFP-100G-SM-SR
Cisco 40GBase-AOC QSFP to 4 SFP+ Active Optical breakout Cable, 5-meter
QSFP-4X10G-AOC5M
Blank for
an empty
Supervisor slot
CBR-SUP-BLANK
Blank for
an empty
Supervisor PIC slot
CBR-SUP-PIC-BLANK
Air filter
for the Supervisor
CBR-SUP-FILTER=
Table 28. Ordering
Information for Cisco cBR-8 Router Interface and Modules
Product
Description
Part
Number
Cisco cBR-8 CCAP line
cards
The cBR
CCAP line card includes two downstream DOCSIS 3.0 modules as well as one
upstream DOCSIS 3.0 Module. The line card can be upgraded to DOCSIS 3.1 on both
downstream and upstream.
CBR-LC-8D30-16U30
The cBR
CCAP line card with one Downstream D3.1 module and one Upstream D3.0 module.
CBR-LC-4D31-16U30
The cBR
CCAP line card with two Downstream D3.1 modules and one Upstream D3.0 module
CBR-LC-8D31-16U30
The cBR
CCAP line card with one Downstream D3.1 module and one Upstream D3.1 module.
CBR-LC-4D31-16U31
The cBR
CCAP line card with two Downstream D3.1 modules and one Upstream D3.1 module.
CBR-LC-8D31-16U31
The cBR CCAP line card with no Downstream or Upstream modules.
CBR-CCAP-LC-40G-R
The cBR CCAP second generation Remote PHY Line Card.
CBR-CCAP-LC-G2-R
cBR CCAP
RF Through PIC (Connectivity to the RF Plant)
CBR-RF-PIC
cBR CCAP
Protect PIC (for N+1 redundancy)
CBR-RF-PROT-PIC
cBR CCAP Digital Through PIC
cBR-DPIC-8X10G
cBR-8 2x100G Digital Physical Interface Card
cBR-DPIC-2X100G
cBR RF
cable bundle (3 meters)
CBR-CABLE-8X16
Blank for
an empty line card slot
CBR-LC-BLANK
Blank for
an empty line card PIC slot
CBR-LC-PIC-BLANK
Downstream
D3.0 module
Downstream
D3.1 module
CBR-D30-DS-MOD
CBR-D31-DS-MOD
Upstream
D3.0 module
Upstream
D3.1 module
CBR-D30-US-MOD
CBR-D31-US-MOD
Air filter
for the cBR CCAP line card
CBR-LC-FILTER=
Table 29. Ordering Information for Cisco Remote PHY Device