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This feature allows you to configure the downstream channel ID.
When modems connect to the cable modem termination system (CMTS), they send the downstream channel ID---not the downstream frequency. By making the channel ID configurable, all modems in a hybrid fiber/coax (HFC) network have unique downstream channel IDs.
Cisco uBR7200
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To configure the downstream channel ID, use the cable downstream channel-id configuration command. Use the no form of this command to set the downstream channel ID to its default value.
cable downstream channel-id id
id | Specifies a downstream channel ID. Valid values are from 1 to 255. |
The unit number of the downstream device.
Config
| Release | Modification |
|---|---|
12.0(4)T | This command was introduced. |
IOS assigns the default value of each device in the order in which devices appear to the CMTS. IOS configures the first device with a default value of 1, the second device is configured with a value of 2, and so on. By assigning default values in this manner, a single CMTS guarantees unique channel IDs. However, this scheme does not guarantee unique channel IDs when more than one CMTS exists on a network.
The following example configures channel ID 44:
Router7200#cable downstream channel-id 44
The next example restores the downstream channel id configuration to the default configuration:
Router7200#no cable downstream channel-id
Posted: Tue Jun 29 12:31:30 PDT 1999
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