Cisco ASR 9000 Series Command Reference Manual page 971

T3, E3, T1, E1 Controller Commands on the Cisco ASR 9000 Series Router
• If specifying a virtual interface, the number range varies, depending on interface type.
Before you can start a BERT on a T1 controller or channel group, you must configure a BERT pattern
Note
using the bert pattern command. If desired, you can also adjust the default setting (1 minute) of the BERT
interval using the bert interval command. Both of these commands are available in T1 configuration
mode and channel group configuration mode.
To view the BERT results, use the show controllers t1 command in EXEC mode. The BERT results include
the following information:
• Type of test pattern selected
• Status of the test
• Interval selected
• Time remaining on the BERT
• Total bit errors
• Total bits received
BERT is data intrusive. Regular data cannot flow on a line while the test is in progress. The line is put in an
alarm state when a BERT is in progress and restored to a normal state after a BERT has been terminated.
Task ID
Task ID
sonet-sdh
Examples The following example shows how to start and stop a BERT on a T1 controller:
RP/0/RSP0/CPU0:router# bert t1 0/3/0/0/0 start
RP/0/RSP0/CPU0:router# bert t1 0/3/0/0/0 stop
The following example shows how to inject errors into the BERT stream on an T1 controller:
RP/0/RSP0/CPU0:router# bert t1 0/3/0/0 error
Related Commands
Command
bert interval, on page 945
bert pattern, on page 947
◦ module: Module number. A physical layer interface module (PLIM) is always 0.
◦ port: Physical port number of the interface.
Cisco ASR 9000 Series Aggregation Services Router Interface and Hardware Component Command Reference,
Operations
read, write
Description
Specifies the duration of a bit error rate test (BERT) pattern on a
T3/E3 or T1/E1 line.
Enables a BERT pattern on a T3/E3 or T1/E1 line or an individual
channel group.
bert t1
Release 5.3.x
951