Cisco Cisco Broadband Access Center for Cable 5.0
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Cisco Broadband Access Center for Cable Administrator’s Guide
OL-2445-02
Chapter 1 Broadband Access Center for Cable Overview
Cisco Network Registrar
information stored on each DPE within a provisioning group is identical so as long as one remains,
operational service will not be interrupted.
operational service will not be interrupted.
shows some typical provisioning group setups with
varying numbers of DPEs.
Figure 1-1
Provisioning Groups and Redundancy for Non-PacketCable Applications Only
The provisioning group at the bottom (C) shows the absolute minimum number of servers that can be
used, one DPE and one DHCP. Cisco does not usually recommend that this be deployed as there is no
redundancy or failover support and if one of the two servers stop functioning then all service is lost until
it is back up again. This configuration could be used if the number of users being serviced in a particular
region is so small that the additional hardware cost cannot be justified and the deployment is willing to
live with an outage if a server stop functioning.
used, one DPE and one DHCP. Cisco does not usually recommend that this be deployed as there is no
redundancy or failover support and if one of the two servers stop functioning then all service is lost until
it is back up again. This configuration could be used if the number of users being serviced in a particular
region is so small that the additional hardware cost cannot be justified and the deployment is willing to
live with an outage if a server stop functioning.
The provisioning group at the top (A) is the most commonly deployed one. A failover pair of DHCP
servers and a redundant pair of DPEs. This provides enough load sharing and redundancy to support
most regional deployments.
servers and a redundant pair of DPEs. This provides enough load sharing and redundancy to support
most regional deployments.
The provisioning group in the center (B) might be used in an area that has a higher constant rate of
change to the devices being serviced or where large numbers of customer devices go up and down
frequently. The addition of two DPEs allows the extra load to be shared over four DPEs, which allows
greater numbers of devices to be serviced in the same amount of time or less.
change to the devices being serviced or where large numbers of customer devices go up and down
frequently. The addition of two DPEs allows the extra load to be shared over four DPEs, which allows
greater numbers of devices to be serviced in the same amount of time or less.
Cisco Network Registrar
Network Registrar provides Dynamic Host Configuration Protocol (DHCP) and Domain Name System
(DNS) functionality. It has a complete administrative user interface that, when coupled with customized
BAC configuration screens, can be used within a larger enterprise management system.
(DNS) functionality. It has a complete administrative user interface that, when coupled with customized
BAC configuration screens, can be used within a larger enterprise management system.
Note
For additional information on Network Registrar, refer to these documents: Network Registrar User's
Guide, Network Registrar CLI Reference, and the Network Registrar Installation Guide.
Guide, Network Registrar CLI Reference, and the Network Registrar Installation Guide.
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DHCP A
DPE A
Regional
Distribution
Unit
Head Ends
Customer
Premises
Equipment
Single Machine
DHCP A
DPE A
DHCP C
DPE C
Customer
Premises
Equipment
DHCP B
DPE B
Customer
Premises
Equipment
DHCP B
DPE B
DPE B
DPE B