Figure 1 Sample Topology ISP IP-related WAN ATM, FDDI, 100BT.
� Cisco StandĬMTS to Cable Modem Network Topology CMTS to Cable Modem Network Topology Figure 1 shows the physical relationship between the devices in the HFC network and the cable modem. It defines the radio-frequency interface specification for high-speed data-over-cable systems. Supported MIBs and RFCs The Cisco uBR904 cable modem supports the following: � Radio Frequency Interface Specification-This specification is developed by the Multimedia Cable Network System (MCNS) corsortium.
Delete modem mac address lookup software#
Enter the show version EXEC command to display the software version level. List of Terms Prerequisites Cisco IOS Release 11.3(4)NA or later must be running inside the cable modem. Downstream channels used for television in the U. Channel-A specific frequency allocation and bandwidth. Cable router-A modular chassis-based router optimized for the data over CATV HFC applications.
Cable modem-Any device that modulates and demodulates digital data onto a CATV plant. CATV now refers to any cable (coaxial/fiber) based system that provides television services.
The CM will eventually hit its T4 timeout value and reset as per the DOCSIS Specification. This means the CM will range but not get any ranging response. The way "clear cable modem reset" works is the CMTS removes the CM from its periodic ranging list. If anyone knows what exactly happens, can someone provide some documentation on it? I couldn't find this answer on Cisco's site, and I can't really start trying debug options on a live system. So I was wondering if the reset is due to the lack of a maintenance message and/or some packet(s) sent to the modems IP address requesting it to reinitialize. It reads two ways saying it removes it from the list and sends a reset packet, or just removes it from the list and then the modem resets from the lack of messages The command reference says this command removes the modem from that mac maintenance list AND the modem resets. Like a reset packet or some sort of information telling the cable modem to reinitialize. I know that this removes a cable modem from the mac maintenance message list, but I'm wondering whether this sends any information to a cable modem specifically. I was looking at the humble "clear cable modem reset" command and was wondering if anyone had further detail on what exactly happens when this command is issued.