Cisco Broadband Cable Command Reference Guide

ping docsis
5-64
Queueing 5 MAC-layer station maintenance intervals, timeout is 25 msec:
!!!!!
Success rate is 100 percent (5/5)
Cisco Broadband Cable Command Reference Guide
Chapter 5 Cable CPE Commands
The following example shows that the CM at 192.168.100.10 is connected to the network and is
operational, but that one ping packet was lost and that several power adjustments were made during the
ping process:
Router# ping docsis 192.168.100.10
Queueing 100 MAC-layer station maintenance intervals, timeout is 25 msec:
!!!!!a!!!!!!!a!a!!!!!!!!!!!!!!!!!!!!!aa!!!!!!!!!!a!!!a!a!!!aa!!!!!!.!!a!!!a!
a!a!!!!!!!!aa!!!!!!!aa!a
Success rate is 99 percent (99/100)
A CM that displays output such as that above (a higher percentage of successful pings but with a number
of power adjustment readings) is most likely experiencing a problem that is not bad enough to force the
modem offline, but that does indicate a problem that should be addressed.
If this problem is consistent for just a small number of modems on an upstream receiver (such as a fiber
node within a combining group), then the problem is likely related to in-home wiring at those modem
locations. It could also be due to a cable TV network element that is on the same HFC segment.
If the problem occurs for all CMs on a single fiber node, then changing the upstream frequency or
reducing the number of homes passed per combining group might improve conditions. If this does not
help the situation, the problem could be due to a faulty cable drop, dirty optical connector on the node,
or other physical plant problem.
Related Commands Command Description
ping Outputs one or more IP ping requests to a particular IP address.
OL-1581-05