Avaya M770 - page 70

Chapter 5 Managing Physical Ports
50 Avaya M770 ATM Switch User’s Guide
Configuring payload scrambling
You can configure payload scrambling on or off. The default setting on.
When payload scrambling is enabled, the transmitted data will be passed through a
self-synchronizing scrambler with the polynomial x43+1. This provides security
against false cell and frame delineation.
Note: You must disable the physical port before you can change, clear or reset any
physical port parameters. For more information about how to disable a physical
port, see Disabling a Physical Port on page 49.
To configure payload scrambling for a physical port, use the pport set
payloadscrambling command.
Specifying the framing mode for a port
You can specify that the framing mode used for a physical fiber optic port is either
Sonet or SDH. The default setting is Sonet. For DS3 modules you can specify that the
framing mode used for a DS3 physical port is either CBIT or M23. The default
setting for DS3 ports is CBIT.
Note: You must disable the physical port before you can change, clear or reset any
physical port parameters. For more information about how to disable a physical
port, see Disabling a Physical Port on page 49.
To specify framing for a physical fiber optic port, use the pport set framing
command.
Command: M15-155s8:/>pport set payloadscrambling <pport> [on | off]
Example: M15-155s8:/>pport set payloadscrambling 8.3 on
Parameters: <pport id> The physical port identifier in the form <slot>.<portnumber>.
[on | off] To specify the whether payload scrambling is on or off.
Command: M15-155s8:/>pport set framing <pport> [sonet | SDH]
Example: M15-155s8:/>pport set framing 8.1 SDH
Parameters: <pport id> The physical port identifier in the form <slot>.<portnumber>.
Sonet Sets the framing mode for the physical port to Sonet. The
default setting is Sonet.
SDH Sets the framing mode for the physical port to SDH.