Cisco Systems OC-12/STM-14 Entering Errors in BER Tests, Router# show controller oc12 1/01 bert

Cisco IOS Software Configuration for the 1-Port Channelized OC-12/STM-4 (DS3) Line Card

How to Configure the 1-Port Channelized OC-12/STM-4 (DS3) Line Card

Entering Errors in BER Tests

To insert intentional errors into the BER test stream, use the following command syntax:

bert errors [no-of-errors], where the no-of-errorsdefault is 1 and the range is 1 to 255, inclusive. The following example shows the command used to insert five errors into the current BER test stream that is running the pseudorandom pattern 2^23 that repeats on the first DS3 channel for 10 minutes:

Router# configure terminal

Router(config)# interface serial 1/0:1

Router(config-if)#bert pattern 2^23 interval 10

Router(config-if)# bert errors 5

Router(config-if)# end

Router(config)# end

Router#

Using show Commands to Verify BERT Configuration

When the DS3 serial port is running a BERT, the serial port state is down, and only BERT data is passed. You can use the show commands shown in Table 7 to verify if the line card state is up or down.

Table 7 Show Commands for BERT Configuration

The following output indicates that BERT is enabled with a pattern of 2^23 and an interval of 10 minutes:

Router# show controller oc12 1/0:1 bert

Interface Serial1/0 (DS3 port 1)

Router#

Note The bit error test patterns from the serial ports on a 1-port channelized OC-12/STM-4 (DS3) line card are framed test patterns; therefore, they are inserted into the payload of a framed T3 signal.

Cisco IOS Release 12.0(8)S

15