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Activate Cable Modem Insertion Interval
Configuring Cisco uBR7246 Universal Broadband Router Features VC-159
Validation Tips
To verify that cable modem upstream verification has been activated or deactivated, enter the
command more system:running-config and look for the cable interface configuration information.
If cable modem upstream verification has been deactivated, it does not appear in this output. If cable
modem upstream verification has been activated, it appears in this output as cable source-verify as
shown in this command output excerpt:
router# more system:running-config
Building configuration...
Current configuration:
!
interface Cable6/0
ip address 1.1.1.1 255.255.255.0
no keepalive
cable source-verify
cable insertion-interval 2000
cable downstream annex B
cable downstream modulation 64qam
cable downstream interleave-depth 32
cable downstream symbol-rate 5056941
cable upstream 0 frequency 15008000
cable upstream 0 fec
cable upstream 0 scrambler
no cable upstream 0 shutdown
!
Troubleshooting Tips
If you are having trouble, make sure that you entered the correct slot and port numbers when you
entered cable interface configuration mode.
Activate Cable Modem Insertion Interval
When a cable modem is ready to transmit data, it requests a channel from the Cisco uBR7246. You
can limit the amount of time that a cable modem requests a channel for the first time from the
Cisco uBR7246. A cable modem’s initial channel request is known as insertion. The valid range is
100 to 2000 milliseconds.
To activate cable modem insertion interval, use the following command in cable interface
configuration mode:
Command Task
cable insertion-interval milliseconds Set the insertion interval in milliseconds.