Appendix B. Cable Monitor and Ethereal
Throughout the book, you often saw packet traces used to illustrate how the various PacketCable protocols work and interrelate. Obtaining these traces can also provide great insight and assistance in troubleshooting issues you might encounter in a PacketCable deployment. The Ethereal packet sniffer utility is excellent at providing this functionality; embedded in this utility are several enhancements for decoding the protocols related to PacketCable. One of these is the capability to decode Data-Over-Cable Service Interface Specification (DOCSIS) frames and to decipher DOCSIS messages and parameters. These DOCSIS packet traces can be obtained through the use of an external radio frequency (RF) packet sniffer ...
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