Datasheet

Network Analysis Module (NM-NAM)

show interfaces analysis-module

Cisco IOS Release: Multiple releases (see the Feature History Table)

CRC Errors created when the CRC generated by the

originating LAN station or far-end device does not

match the checksum calculated from the data

received. On a LAN, this usually indicates noise or

transmission problems on the LAN interface or the

LAN bus itself. A high number of CRCs is usually

the result of collisions or a station that is

transmitting bad data.

frame Number of packets received incorrectly that have a

CRC error and a noninteger number of octets. On a

LAN, this is usually the result of collisions or a

malfunctioning Ethernet device.

overrun Number of times that the receiver hardware was

unable to hand received data to a hardware buffer

because the input rate exceeded the receiver’s ability

to handle the data.

ignored Number of received packets that were ignored by the

interface because the interface hardware ran low on

internal buffers. These buffers are different from

system buffer space described. Broadcast storms and

bursts of noise can cause the ignored count to

increase.

input packets with dribble condition detected Number of packets with dribble condition. Dribble

bit error indicates that a frame is slightly too long.

This frame error counter is incremented just for

informational purposes; the router accepts the frame.

packets output Total number of messages that have been transmitted

by the system.

bytes Total number of bytes, including data and MAC

encapsulation, that have been transmitted by the

system.

underruns Number of times that the transmitter has run faster

than the router could handle. This may never be

reported on some interfaces.

output errors Sum of all errors that prevented the final

transmission of datagrams out of the interface that is

being examined. Note that this may not balance with

the sum of the enumerated output errors, because

some datagrams may have more than one error, and

others may have errors that do not fall into any of the

specifically tabulated categories.

Table 5 show interfaces analysis-module Field Descriptions (continued)

Field Description