System information

Configuring Packet Over SONET
14-25
Displaying Physical SONET Link and Alarm Information
SONET alarm hierarchy rules mandate that only the most severe alarm of an alarm
group is reported. Reported alarms are logged to the console.
input errors Total number of no buffer, runts, giants, CRCs, frame,
overrun, ignored, and abort counts. Other input-related
errors can also increment the count, so that this sum might
not balance with the other counts.
CRC Cyclic redundancy checksum generated by the originating
LAN station or far-end device does not match the
checksum calculated from the data received.
overruns Number of times the serial receiver hardware was unable
to transfer received data to a hardware buffer because the
input rate exceeded the receiver ability to handle the data.
aborts Illegal sequence of one bits on the interface.
parity Report of the parity errors on the interface.
packets output Total number of messages transmitted by the system.
bytes (output) Total number of bytes, including data and MAC
encapsulation, transmitted by the system.
underruns Number of times that the far-end transmitter has been
running faster than the near-end router’s receiver can
handle.
output errors Sum of all errors that prevented the final transmission of
datagrams out of the interface being examined.
collisions Number of collisions on the interface.
interface resets Number of times an interface has been completely reset.
carrier transitions Number of times the carrier detect signal of the interface
has changed state.
Table 14-9 show interface pos Output Fields and Descriptions
Field Description