Wideband Cmts Redundancy And Resiliency - Cisco WCM300 - Channel Bonded Cable Modem Implementation Manual

Wideband CMTS Redundancy and Resiliency

Wideband CMTS Redundancy and Resiliency
The uBR10012 wideband CMTS and related hardware and software provide redundancy and resiliency
to the Cisco Cable Wideband Solution. Reliable, fault-tolerant components and resilient network
technologies automatically identify and overcome failures. The following sections describe the
wideband CMTS redundancy and resiliency features:
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Table 2-6
recommended hardware configuration (see
listed in
are correctly installed and configured.
Table 2-6
Modular CMTS Component
PRE2 route processors
Redundant power supplies
Redundant Timing, Communication, and Control
Plus (TCC+) cards
Fan assembly module
Redundant Half-Height Gigabit Ethernet (HHGE)
line cards
uBR10-MC5X20S/U/H and
uBR10-MC5X20U-D cable interface line cards
Refer to the Cisco uBR10012 Universal Broadband Router Hardware Installation Guide for complete
information on the uBR10012 router's hardware redundancy.
Cisco Cable Wideband Solution Design and Implementation Guide, Release 1.0
2-18
PRE2 Redundancy and Resiliency, page 2-19
uBR10-MC5X20 Line Card Redundancy, page 2-19
Wideband SPA Redundancy and Resiliency, page 2-20
Edge QAM Redundancy, page 2-21
summarizes redundancy and resiliency support for the Cisco uBR10012 base system's
Table 2-6 can be replaced without interrupting system operations when redundant components
Cisco uBR 10012 Base System Redundancy and Resiliency
Chapter 2
Table 2-1). If component failure occurs, the components
Redundancy and Resiliency Summary
Two PRE2 modules. The Route Processor
Redundancy Plus feature and DOCSIS Stateful
Switchover provide the PRE2 modules with fast
route processor failover without DOCSIS line
card reboot.
Two DC or AC power entry modules (PEMs). If
one PEM fails, the other PEM immediately begins
providing the required power to the system.
The two TCC+ cards monitor each other's priority
information so that if the active card fails, the
active card role is transferred to the redundant
backup card without loss of data.
The fan assembly has four internal fans. If a single
fan fails and the fan assembly is still able to cool
the chassis, the router will continue to function
until the fan assembly module can be replaced.
Multiple HHGE line cards to support connectivity
to multiple destinations and to provide network
layer redundancy.
N+1 Redundancy provides automatic switchover
and recovery for cable modems connected as
DOCSIS 1.X/2.0 modems in the event that there is
a cable interface line card failure.
Cisco Cable Wideband Components
OL-10705-02