Command Reference

show controllers t1

Use the show controllers t1 privileged EXEC command on the Cisco 4000 series, Cisco 7000 series and Cisco 7500 series to display information about the T1 links supported by the Network Processor Module (NPM) (Cisco 4000) or the Multichannel Interface Processor (MIP) (Cisco 7000).
show controllers t1 [slot/port]

Syntax Description

slot (Optional) Backplane slot number; value can be 0, 1, 2, 3, or 4.

port (Optional) Port number of the controller; value can be 0 or 1.

Command Mode

EXEC

Usage Guidelines

This command first appeared in Cisco IOS Release 10.0.

This command displays controller status that is specific to the controller hardware. The information displayed is generally useful for diagnostic tasks performed by technical support personnel only.

The NPM or MIP can query the port adapters to determine their current status. Issue a show controller t1 command to display statistics about the T1 link.

If you specify a slot and port number, each 15 minute period will be displayed.

Sample Display

The following is sample output from the show controller t1 command on the Cisco 7000 series:
Router# show controllers t1
  T1 4/1 is up.
  No alarms detected.
  Framing is ESF, Line Code is AMI, Clock Source is line
  Data in current interval (0 seconds elapsed): 
     0 Line Code Violations, 0 Path Code Violations 0 Slip Secs, 0 Fr Loss Secs, 
     0 Line Err Secs, 0 Degraded Mins 0 Errored Secs, 0 Bursty Err Secs, 
     0 Severely Err Secs, 0 Unavail Secs 
  Total Data (last 79 15 minute intervals): 
     0 Line Code Violations, 0 Path Code Violations, 0 Slip Secs, 0 Fr Loss Secs, 
     0 Line Err Secs, 0 Degraded Mins, 0 Errored Secs, 0 Bursty Err Secs, 
     0 Severely Err Secs, 0 Unavail Secs 
Router#
  
Table 33 describes the show controllers t1 display fields.

Table 33 Show Controller T1 Field Descriptions

Field Description

T1 0/0 is up. The T1 controller 0 in slot 0 is operating. The controller's state can be up, down, administratively down. Loopback conditions are shown by (Locally Looped) or (Remotely Looped).

No alarms detected. Any alarms detected by the controller are displayed here. Possible alarms are as follows:
Transmitter is sending remote alarm.
Transmitter is sending AIS.
Receiver has loss of signal.
Receiver is getting AIS.
Receiver has loss of frame.
Receiver has remote alarm.
Receiver has no alarms.

Data in current interval (725 seconds elapsed) Shows the current accumulation period, which rolls into the 24-hour accumulation every 15 minutes. Accumulation period is from 1 to 900 seconds. The oldest 15 minute period falls off the back of the 24-hr accumulation buffer.

Line Code Violations Indicates the occurrence of either a Bipolar Violation (BPV) or Excessive Zeros (EXZ) error event.

Path Code Violations Indicates a frame synchronization bit error in the D4 and E1-noCRC formats, or a CRC error in the ESF and E1-CRC formats.

Slip Secs Indicates the replication or deletion of the payload bits of a DS1 frame. A slip may be performed when there is a difference between the timing of a synchronous receiving terminal and the received signal.

Fr Loss Secs Indicates the number of seconds an Out Of Frame (OOF) error is detected.

Line Err Secs Line Errored Seconds (LES) is a second in which one or more Line Code Violation errors are detected.

Degraded Mins A Degraded Minute is one in which the estimated error rate exceeds 1E-6 but does not exceed 1E-3.

Errored Secs In ESF and E1-CRC links, an Errored Second is a second in which one of the following are detected: one or more Path Code Violations; one or more Out of Frame defects; one or more Controlled Slip events; a detected AIS defect.
For D4 and E1-noCRC links, the presence of Bipolar Violations also triggers an Errored Second.

Bursty Err Secs A second with fewer than 320 and more than 1 Path Coding Violation error, no Severely Errored Frame defects and no detected incoming AIS defects. Controlled slips are not included in this parameter.

Severely Err Secs For ESF signals, a second with one of the following errors: 320 or more Path Code Violation errors; one or more Out of Frame defects; a detected AIS defect.
For E1-CRC signals, a second with one of the following errors: 832 or more Path Code Violation errors; one or more Out of Frame defects.
For E1-nonCRC signals, a second with 2048 Line Code Violations or more.
For D4 signals, a count of 1-second intervals with Framing Errors, or an Out of Frame defect, or 1544 Line Code Violations.

Unavail Secs A count of the total number of seconds on the interface.

slot	(Optional) Backplane slot number; value can be 0, 1, 2, 3, or 4.
port	(Optional) Port number of the controller; value can be 0 or 1.

Field	Description
T1 0/0 is up.	The T1 controller 0 in slot 0 is operating. The controller's state can be up, down, administratively down. Loopback conditions are shown by (Locally Looped) or (Remotely Looped).
No alarms detected.	Any alarms detected by the controller are displayed here. Possible alarms are as follows: Transmitter is sending remote alarm. Transmitter is sending AIS. Receiver has loss of signal. Receiver is getting AIS. Receiver has loss of frame. Receiver has remote alarm. Receiver has no alarms.
Data in current interval (725 seconds elapsed)	Shows the current accumulation period, which rolls into the 24-hour accumulation every 15 minutes. Accumulation period is from 1 to 900 seconds. The oldest 15 minute period falls off the back of the 24-hr accumulation buffer.
Line Code Violations	Indicates the occurrence of either a Bipolar Violation (BPV) or Excessive Zeros (EXZ) error event.
Path Code Violations	Indicates a frame synchronization bit error in the D4 and E1-noCRC formats, or a CRC error in the ESF and E1-CRC formats.
Slip Secs	Indicates the replication or deletion of the payload bits of a DS1 frame. A slip may be performed when there is a difference between the timing of a synchronous receiving terminal and the received signal.
Fr Loss Secs	Indicates the number of seconds an Out Of Frame (OOF) error is detected.
Line Err Secs	Line Errored Seconds (LES) is a second in which one or more Line Code Violation errors are detected.
Degraded Mins	A Degraded Minute is one in which the estimated error rate exceeds 1E-6 but does not exceed 1E-3.
Errored Secs	In ESF and E1-CRC links, an Errored Second is a second in which one of the following are detected: one or more Path Code Violations; one or more Out of Frame defects; one or more Controlled Slip events; a detected AIS defect. For D4 and E1-noCRC links, the presence of Bipolar Violations also triggers an Errored Second.
Bursty Err Secs	A second with fewer than 320 and more than 1 Path Coding Violation error, no Severely Errored Frame defects and no detected incoming AIS defects. Controlled slips are not included in this parameter.
Severely Err Secs	For ESF signals, a second with one of the following errors: 320 or more Path Code Violation errors; one or more Out of Frame defects; a detected AIS defect. For E1-CRC signals, a second with one of the following errors: 832 or more Path Code Violation errors; one or more Out of Frame defects. For E1-nonCRC signals, a second with 2048 Line Code Violations or more. For D4 signals, a count of 1-second intervals with Framing Errors, or an Out of Frame defect, or 1544 Line Code Violations.
Unavail Secs	A count of the total number of seconds on the interface.