IBM 8260 manual SET Port slot.port Speeddetect enabledisable, SET Module slot.port Speedthreshold

The number of times that a phantom transition is allowed to cause a port to unwrap is determined by the bcn_threshold parameter which can be set for each module using the following command:

SET MODULE {slot.port} BCN_THRESHOLD {0-255}

Once the threshold is exceeded, the port or trunk remains wrapped until the user disables and re-enables the port. While wrapped, the port status is

BCN THRES EXCEEDED.

Note: The bcn_threshold is reset whenever a port successfully inserts into the ring, or the module is reset.

2. Enable/disable speed detection for each port.

You can enable/disable speed detection for the individual ports on the passive module using the following command:

SET PORT {slot.port} SPEED_DETECT {enabledisable}

When enabled, speed detection prevents the stations from inserting into the ring at the wrong speed. When the incorrect speed is detected, the port is wrapped and the status of the port is changed to SPEED MISMATCH. The port will unwrap when a phantom transition is detected on the port or the port is disabled and then re-enabled by the administrator. For more information about speed detection, please refer to 8.8.2, ªSpeed Detection on Passive Modulesº on page 149.

3.Set speed threshold for the module.

You can set the number of times that a phantom transition allows a wrapped port, due to the beacon conditions, to unwrap. To do so, you can use the following command:

SET MODULE {slot.port} SPEED_THRESHOLD {0-255}

When this threshold is reached, the port remains wrapped with the status of SPD THRESHOLD EXCEEDED until the administrator disables and re-enables the port.

Note: This threshold is reset whenever a port on the module successfully inserts into the ring.

4.Assign the module to a network segment.

Use the following command to assign the module to one of the backplane segments or isolate it from the backplane.

SET PORT {slot.port} NETWORK {network}

Note: As a result of this command, all the ports on the module will be assigned to the same segment.

5. Enable/disable ports.

Each port can be enabled/disabled using the following command:

SET PORT {slot.port} mode {enabledisable}

184 8260 Multiprotocol Intelligent Switching Hub