The second is an RFC868 compliant Time of Day (ToD) server which lets the modem know what the current time is.

The first is a DHCP server, which provides the cable modem with an IP address, a subnet mask and other IP related parameters. DescriptionĪ DOCSIS compliant cable modem requires access to three types of servers in order to successfully come online. The hardware use in this document were from the Cisco uBR7200, uBR7100 or uBR10k CMTS and DOCSIS compliant cable modems. The reader should have a basic understanding of the DOCSIS protocol and Cisco IOS command line on the uBR series routers. This configuration is known as 'all-in-one configuration for Cisco's CMTS.' Before You Begin Conventionsįor more information on document conventions, see the Cisco Technical Tips Conventions. It also explains how to built the DOCSIS configuration file using CLI on the CMTS. This document shows a configuration on Cisco's Cable Modem Termination System (CMTS) that acts as a Dynamic Host Configuration Protocol (DHCP), ToD, and TFTP server. Verification Tips for Advanced Configuration Introduction

Configure tftp server