Cisco Systems UBR10012 HCCP N+1 Redundancy Supporting DOCSIS 1.1 for the Cisco CMTS, HCCP Timing and Error Enhancements in HCCP Redundancy Show Commands

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Cisco uBR10012 Universal Broadband Router Software Configuration Guide
OL-1520-08
Chapter1 Overview of CiscouBR10012 Universal Broadband Router Software
Supported Software Features for the CiscouBR10012 Router
previous Cisco IOS releases supporting 7+1 Redundancy. Global configuration makes this High
Availability feature easier to configure and use. 7+1 Redundancy is the default redundancy scheme
for the Cisco uBR10012 router in Cisco IOS Release 12.3(17a)BC.
•4+1 Redundancy, supporting the Cisco uBR10012 router with one Cisco RF Switch
In this configuration, four Working cable interface line cards are supported by one Protect line card.
One Cisco RF Switch is connected to five cable interface line cards. Switchover events apply to an
entire line card.
Either form of N+1 Redundancy supports the Cisco uBR-MC5X20U/D broadband processing engine
(BPE) on the Cisco uBR10012 router.
Note N+1 Redundancy requires that all BPEs in the Cisco uBR10012 router be the same. Only the
CiscouBR-MC5X20U/D BPE is supported.
Note Cisco IOS Release 12.3(17a)BC introduces simplified global configuration commands, supporting 4+1
or 7+1 Redundancy on the Cisco uBR10012 router. However, earlier configuration commands are not
supported when Global-level N+1 Redundancy is configured on the Cisco uBR10012 router.
For additional information about HCCP 4+1 Redundancy, refer to the following document on
Cisco.com:
•N+1 Redundancy for the CiscoCMTS
http://www.cisco.com/en/US/products/hw/cable/ps2217/products_feature_guide_chapter09186a00
8015096c.html
HCCP N+1 Redundancy Supporting DOCSIS 1.1 for the Cisco CMTS
The N+1 Redundancy for the Cisco CMTS feature extends the existing HCCP 1+1 cable interface redundancy
feature, where one cable interface is designated the working interface, and a second cable interface is the
protect interface. The protect interface comes online only when the working interface fails.
The N+1 Redundancy feature allows a single cable interface to act as the protect interface for up to 7 cable
interfaces in the Cisco uBR10012 router, thereby significantly reducing the cost of providing redundant
operation. The cable interface connections are made through the Cisco uBR-RFSW RF Switch.
Note For complete information about the N+1 Redundancy feature, see the “N+1 Redundancy for the Cisco
CMTS” chapter in the Cisco Cable Modem Termination System Feature Guide on Cisco.com.
HCCP Timing and Error Enhancements in HCCP Redundancy Show Commands
Cisco IOS release 12.3(13a)BC introduces enhanced information in show commands that support HCCP
N+1 Redundancy on the Cisco CMTS. These commands allow you to check for synchronization history
and errors between the HCCP Working and HCCP Protect cable interface line cards.
Cisco IOS Release 12.3(13a)BC introduces such enhancements to the following show commands:
•show hccp error
•show hccp group