User Manual

Enterasys X-Pedition User Reference Manual 97
Cell Mapping
Note: Refer to the SONET chapter in the Command Line Interface Manual for information
about cell scrambling on SONET PHY interfaces.
To enable cell scrambling on an ATM port, enter the following command in Configure mode:
The following is a description of the parameters used to enable cell scrambling:
port <port list> Specifies the port, in the format: media.slot.port. Specify all-ports to enable
cell scrambling on all ports.
media Specifies the media type. This is at for ATM ports.
slot Specifies the slot number where the module is installed.
port Specifies the port number.
pdh-cell-scramble on|off
Specify on to enable cell scrambling. Specify off to disable cell scrambling.
Cell Mapping
The ATM cells are mapped into a PDH (E3, T3, E1) frame using two different mapping formats.
The two mapping formats available are direct ATM cell mapping and physical layer convergence
protocol (PLCP) mapping.
Selecting the Cell Mapping Format
To select a cell mapping format on an ATM port, enter the following command in Configure mode:
The following is a description of the parameters used to select the cell mapping format:
port <port list> Specifies the port, in the format: media.slot.port. Specify all-ports to
select the cell mapping format for all ports.
media Specifies the media type. This is at for ATM ports.
slot Specifies the slot number where the module is installed.
port Specifies the port number.
Enables cell scrambling on an ATM
port.
atm set port <port list> pdh-cell-scramble on| off
Selects a cell mapping format on an
ATM port.
atm set port <port list> cell-mapping direct| plcp