How do I provision QoS on the DOCSIS 1.0+ system?
A. For the purpose of this section, we assume that an operator expects three basic packet types on the end-to-end IP network: • IP packets with precedence equal to 0x05 for voice or fax transport • IP packets with precedence equal to 0x03 for voice or fax signaling • IP packets with precedence other than 0x03 or 0x05 for regular data For end-to-end QoS to work, it is important that all the nodes in the end-to-end network understand and honor the above IP-precedence mapping. All the network nodes starting from ITCM to uBR7200 to backbone router(s) to Trunking Gateway (TGW) will need to have consistent interpretation of the above precedence. For an ITCM DOCSIS Trivial File Transfer Protocol (TFTP) configuration file, we assume that the ITCM is provisioned with a single Best Effort Data Class and two VoIP phone lines. One immediate variation is to provision two Data Classes, a Best Effort Data Class for Data packets and MAC messages, and one CIR Data Class for voice signaling packets. For
