Cisco 7246 - uBR Router Настройка - Страница 24
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Set Optional IP Parameters
Activate IP Multicast Echo
You can activate upstream IP multicast echo so that the Cisco uBR7246 can echo multicast packets.
The default is "on" (IP multicast echo is activated). To activate IP multicast echo, use the following
command in cable interface configuration mode:
Command
cable ip-multicast-echo
Validation Tips
To verify if IP multicast echo has been activated or deactivated, enter the command more
system:running-config and look for the cable interface configuration information. If IP multicast
echo has been activated, it does not appear in this output. If IP multicast echo has been deactivated,
it appears in this output as no cable ip-multicast-echo as shown in the command output excerpt
below:
router# more system:running-config
Building configuration...
Current configuration:
!
interface Cable6/0
!
Troubleshooting Tips
If you are having trouble, make sure that you have entered the correct slot and port numbers when
you entered cable interface configuration mode.
Activate IP Broadcast Echo
You can activate upstream IP broadcast echo so that the Cisco uBR7246 can echo broadcast packets.
The default value is "off" (IP broadcast echo is not activated). To activate IP broadcast echo, use the
following command in cable interface configuration mode:
Command
cable ip-broadcast-echo
VC-156
Voice, Video, and Home Applications Configuration Guide
ip address 1.1.1.1 255.255.255.0
no keepalive
no cable ip-multicast-echo
cable insertion-interval 150000
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
Purpose
Enable IP multicast echo.
Purpose
Enable IP broadcast echo.