Cisco Systems UBR900 User Manual

Cisco IOS Release 12.0(7)T

Examples

Traffic passing through the cable access router interface is shown in the following example:

uBR924# show interfaces cable-modem 0

  cable-modem0 is up, line protocol is up 

  Hardware is BCM3300, address is 0050.7366.2439 (bia 0050.7366.2439)

  Internet address is 5.2.0.11/16

  MTU 1500 bytes, BW 27000 Kbit, DLY 1000 usec, 

     reliability 255/255, txload 1/255, rxload 1/255

  Encapsulation DOCSIS, loopback not set

  Keepalive set (10 sec)

  ARP type:ARPA, ARP Timeout 04:00:00

  Last input 00:00:00, output 00:00:00, output hang never

  Last clearing of "show interface" counters 00:08:40

  Queueing strategy:fifo

  Output queue 40/40, 52787 drops; input queue 0/75, 0 drops

  5 minute input rate 2000 bits/sec, 2 packets/sec

  5 minute output rate 94000 bits/sec, 154 packets/sec

     1074 packets input, 418472 bytes, 0 no buffer

     Received 19 broadcasts, 0 runts, 0 giants, 0 throttles

     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort

     78771 packets output, 6326786 bytes, 0 underruns

     0 output errors, 0 collisions, 0 interface resets

     0 output buffer failures, 0 output buffers swapped out

Table 16 describes the significant fields shown in the display.

cable-modem0 is up

Indicates that the interface is currently active. “Disabled” indicates the interface 
has received more than 5000 errors in one keepalive interval (10 seconds by 
default if keepalive is set); “administratively down” indicates the interface has 
been taken down by an administrator.

line protocol is up

Indicates that the software processes that handle the line protocol believe the 
interface is usable.

Hardware 

Hardware type and MAC address.

Internet address

Internet address followed by the shorthand notation for the subnet mask.

MTU

Maximum Transmission Unit (equivalent of the maximum packet size) for the 
interface.

BW

Bandwidth of the interface in kilobits per second.

DLY

Delay of the interface in microseconds.

reliability

Reliability of the interface, expressed as a fraction of 255, calculated as an 
exponential average over a 5-minute period. (255/255 equals 100% reliability.)

tx load/rx load

Load on the interface caused by transmitting and receiving, expressed as a 
fraction of 255, calculated as an exponential average over a 5 minute period.

Encapsulation/loopback/keepalive

Encapsulation method assigned to the interface.

loopback

Indicates whether or not loopback is set.

keepalive

Indicates whether or not keepalives are set.

ARP type

Type of Address Resolution Protocol configured for the interface.

ARP Timeout

Number of hours, minutes, and seconds an ARP cache entry will stay in the 
cache.