Cisco Systems UBR900 specifications Configuring the Cisco uBR900 Series Cable Access Routers

show interfaces cable-modem

Table 16 show interfaces cable-modem Field Descriptions (continued)

Field	Description
Last input/output	Number of hours, minutes, and seconds since the last packet was successfully
	received/transmitted by the interface.
output hang	Number of hours, minutes, and seconds since the interface was last reset because
	of a transmission that took too long. When the number of hours in any of the
	“Last..” fields exceeds 24, the number of days and hours is displayed. If the field
	overflows, asterisks are printed.
Last clearing of “show interface”	Time at which the counters that measure cumulative statistics (such as number of
counters	bytes transmitted and received) shown in this report were last reset to zero. Note
	that variables that might affect routing (for example, load and reliability) are not
	cleared when the counters are cleared.
	*** indicates the elapsed time is too large to be displayed.
	0:00:00 indicates the counters were cleared more than 231 milliseconds (and less
	than 232 milliseconds) ago.
Queueing strategy	Type of queueing strategy in effect on the interface.
Output queue/drops	Number of packets in the output queue followed by the size of the queue and the
	number of packets dropped due to a full queue.
input queue/drops	Number of packets in the input queue followed by the size of the queue and the
	number of packets dropped due to a full queue.
5 minute input rate	Average number of bits and packets received and transmitted per second in the
5 minute output rate	last 5 minutes. If the interface is not in promiscuous mode, it senses network
	traffic it sends and receives (rather than all network traffic).
	The 5-minute input and output rates should be used only as an approximation of
	traffic per second during a given 5-minute period. These rates are exponentially
	weighted averages with a time constant of 5 minutes. A period of four time
	constants must pass before the average will be within two percent of the
	instantaneous rate of a uniform stream of traffic over that period.
packets input	Total number of error-free packets received by the system.
bytes input	Total number of bytes, including data and MAC encapsulation, in the error-free
	packets received by the system.
no buffer	Number of received packets discarded because there was no buffer space in the
	main system. Compare with ignored count. Broadcast storms on Ethernet
	networks and bursts of noise on serial lines are often responsible for no input
	buffer events.
Received broadcasts	Total number of broadcast or multicast packets received by the interface.
runts	Number of packets discarded because they were smaller than the medium’s
	minimum packet size. For example, any Ethernet packet less than 64 bytes is
	considered a runt.
giants	Number of packets discarded because they were larger than the medium’s
	maximum packet size. For example, any Ethernet packet larger than 1518 bytes
	is considered a giant.
throttles	Number of times the receiver on the port was disabled, possibly due to buffer or
	processor overload.
input errors	Includes runts, giants, no buffer, CRC, frame, overrun, and ignored counts. Other
	input-related errors can also cause the input errors count to be increased, and
	some datagrams may have more than one error; therefore, this sum may not
	balance with the sum of enumerated input error counts.

Configuring the Cisco uBR900 Series Cable Access Routers 113