Cisco DNCS System Release 2.8.1 3.8.1 4.3.1 User Guide
Prepare the DNCS for DSG
Set Up the DNCS to Support DOCSIS-Capable DHCTs
The following topics summarize the steps you need to take to prepare the DNCS to support DSG-capable
DHCTs. We recommend that you read all of the information in this section before attempting to prepare the
DNCS.
DHCTs. We recommend that you read all of the information in this section before attempting to prepare the
DNCS.
You Need to Know
Preparing the DNCS to support DSG-capable DHCTs takes approximately 2 hours and depends on the number
of QPSK and CMTS bridges you need to configure with a new DCM.
of QPSK and CMTS bridges you need to configure with a new DCM.
Before you begin, make sure that you have completed the following tasks:
.
Obtained a list from your system administrator of all the hubs defined in your network. In addition to
new QPSK or CMTS bridges, this list should also contain the QPSKs whose DHCT communication
modes (DCMs) will change from DAVIC to DOCSIS.
modes (DCMs) will change from DAVIC to DOCSIS.
Note: To support DSG-capable DHCTs, you must configure CMTS bridges on the DNCS. A bridge is
either a QPSK or a collection of CMTS elements. CMTS bridges support DOCSIS operation. Any CMTS
that joins a multicast group defined for a CMTS bridge becomes part of the hub for that bridge. In
addition, all CMTSs joined to the multicast group receive the same OOB data. For these reasons, it is
important for operators to ensure all CMTSs joined to the multicast group of a CMTS bridge do
actually belong on the hub for that bridge.
either a QPSK or a collection of CMTS elements. CMTS bridges support DOCSIS operation. Any CMTS
that joins a multicast group defined for a CMTS bridge becomes part of the hub for that bridge. In
addition, all CMTSs joined to the multicast group receive the same OOB data. For these reasons, it is
important for operators to ensure all CMTSs joined to the multicast group of a CMTS bridge do
actually belong on the hub for that bridge.
Planned and managed the distribution of IP addresses to the DHCTs. Careful planning can prevent
conflicts of IP addresses between existing DAVIC and DSG- capable DHCTs on the DBDS network. To
review the guidelines that can help you assign IP addresses, refer to DOCSIS in a DBDS Environment
(part number 4000358). To obtain a copy of this guide, refer to
review the guidelines that can help you assign IP addresses, refer to DOCSIS in a DBDS Environment
(part number 4000358). To obtain a copy of this guide, refer to
.
These procedures do not impact the network and can be performed at any time.
Setting Up the DNCS to Support DSG-Capable DHCTs
The following information provides an overview of the process you must follow to prepare the DNCS to support
DSG-capable DHCTs. Click any link to display step-by-step instructions for the procedures summarized here.
DSG-capable DHCTs. Click any link to display step-by-step instructions for the procedures summarized here.
Follow these steps to configure the DNCS to support the ability of Explorer 8300 DHCTs to multicast
out-of-band data to DHCTs:
out-of-band data to DHCTs:
. A CMTS bridge is a logical entity that serves DHCTs in the same
hub. Create one CMTS bridge for every hub that serves DSG-capable DHCTs.
. Adding a QPSK modulator for every hub that serves DSG-capable DHCTs
ensures that a bridge resolution file (BRF) is sent to DHCTs. These DHCTs need this file so that they
can determine which CMTS bridge to use for DOCSIS communication. When adding QPSK modulators
to send the BRF to hubs, make sure to add one QPSK modulator for every hub that serves
DSG-capable DHCTs, and to set the DCM of each modulator to DOCSIS.
can determine which CMTS bridge to use for DOCSIS communication. When adding QPSK modulators
to send the BRF to hubs, make sure to add one QPSK modulator for every hub that serves
DSG-capable DHCTs, and to set the DCM of each modulator to DOCSIS.
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