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Cisco Broadband Cable Command Reference Guide
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Chapter 3 Cisco CMTS Show Commands
show interface cable downstream
54335436 packets output, 2854290447 bytes, 0 discarded
0 output errors
1 total active devices, 1 active modems
Total downstream bandwidth: 27000000 bps
Total downstream reserved bandwidth: 1000000 bps
Worst case latency for low latency queue: 0 usecs
Current Upper limit for worst case latency: 0 usecs
Router#
Table 3-51
describes the fields shown in the
show interface cable downstream
display.
Tip
In Cisco IOS Release 12.1(12)EC, Release 12.2(8)BC1, and later releases, you can add a timestamp to
show
commands using the
exec prompt timestamp
command in line configuration mode.
Table 3-51 show interface cable downstream Field Descriptions
Field
Description
Cable
Indicates the location of the downstream interface.
Downstream is
up/...administratively down
Indicates the administrative state of the interface.
packets output
Total number of data packets that have been transmitted on this downstream cable
interface.
bytes
The number of bytes for data packets that have been transmitted on this downstream cable
interface.
discarded
Total number of packets that were not transmitted on the downstream, because of an error,
such as a buffer overrun, the Cisco CMTS running out of memory, or the frame being
larger than the cable interface’s MTU value.
output errors
Total number of packets that could not be transmitted on this downstream cable interface
because of all errors.
total active devices
Total number of active cable modems and customer premises equipment (CPE) devices
that are connected to this downstream cable interface.
active modems
Total number of active cable modems that are connected to this downstream cable
interface.
Total downstream bandwidth
Total bandwidth associated with this downstream cable interface, in bits per second.
Total downstream reserved
bandwidth
Total bandwidth on this downstream cable interface that has been reserved by specifying
a value for the Min Reserved Traffic Rate field for the downstream service flow in the
cable modems’ DOCSIS configuration files.
Worst case latency for low
latency queue
Worst case latency value, in microseconds, that is allowed on this downstream cable
interface, as determined by the Max DS Latency field for the downstream service flow in
the cable modems’ DOCSIS configuration files.
Current Upper limit for worst
case latency
Lowest worst case latency value, in microseconds, that is allowed on this downstream
cable interface. The Cisco CMTS uses the lowest specified Max DS Latency value that
has been specified for a downstream service flow in any of the DOCSIS configuration
files being used by cable modems on this downstream.
If a cable modem tries to register a downstream service flow that uses a worst case latency
that is greater than this value, the Cisco CMTS will refuse to admit that service flow.