Eight-Port Circuit Emulation Service Modules

Chapter 6 Card and Service Configuration

•max_cost is a number establishing the maximum cost of the connection route. The range is 1–255 and is meaningful only in relation to the cost of other connections.

•restrict_trunk_type is a number that specifies the type of trunk this connection can traverse. The numbers are 1 for no restriction, 2 for terrestrial trunk only, and 3 for satellite trunk only.

•pcr is the peak cell rate in cells per second (cps). For T3, the maximum is 118980 cps. For E3, the maximum is 91405 cps.

•mcr is the minimum cell rate. The range is 1–65535 cells per second.

•pct_util is the percent utilization in the range 1–100.

Bit Error Rate Testing on a T3 or E3 CESM

An active MGX-CESM-T3 or MGX-CESM-E3 can perform a bit error rate test (BERT). Each of these cards contains its own BERT controller, so BERT sessions can run on any number of these cards in the system. However, only one user at a time can run BERT on a card. BERT disrupts service because it requires the tested path to be in loopback mode.

The CLI commands (whose functions correspond to CiscoView selections) appear in the following list. The correct order of task execution is crucial for obtaining valid results. With the exception of dspdsx3bert, you must execute the commands in the order they appear in the following list. You can execute dspdsx3bert before, during, or after a session. Because the order of execution is crucial, read the command descriptions whether you use the CiscoView application or the CLI.

1.acqdsx3bert determines if another user currently is running a BERT session on the card.

2.startdsx3bert starts a BERT test (after resetting BERT counters).

3.cnfdsx3bert specifies a pattern for the BERT test.

4.moddsx3bert injects multi-rate errors into the BERT bit stream.

5.deldsx3bert ends the current test (and retains the values in the BERT counters). This command also resets the status of current users that acqdsx3bert detects.

6.dspdsx3bert displays the parameters and results of the current test. You can execute this command at any time.

See the Cisco MGX 8000 Series Command Reference for command details.

Note When a BERT session begins, all the connections on the line go into alarm and return to normal when you end the test. Consequently, the test may result in a large number of traps and other types of traffic (such as AIS).