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Command Reference

Release 11.2 GS

pos scramble-atm

To enable SONET payload scrambling on a POS interface, use the pos scramble-atm interface

command. To disable scrambling, use the no form of this command.

pos scramble-atm

no pos scramble-atm

Syntax Description

This command has no keywords or arguments.

Default

Disabled.

Command Mode

Interface conﬁguration

Usage Guidelines

This command was added in Cisco IOS Release 11.2 GS to support the Cisco 12000 series Gigabit

Switch Routers.

SONET payload scrambling applies a self-synchronous scrambler (x^43+1) to the Synchronous

Payload Envelope (SPE) of the interface to ensure sufﬁcient bit transition density.

Both ends of the connection must use the same scrambling algorithm.

When enabling POS scrambling on a VIP2 POSIP on the Cisco 7500 series that has a hardware

revision of 1.5 or higher, you can specify CRC 16 only (that is, CRC 32 is currently not supported).

To determine the hardware version of the POSIP, use the show diag command. The POS interface

on the Cisco 12000 series has no restrictions.

To determine whether scrambling is enabled on the interface, use the show interface pos command

or show startup-conﬁg command.

Example

The following example enables scrambling on the interface:

Router(config)# interface pos 3/0

Router(config-if)# pos scramble-atm

Router(config-if)# no shutdown

Router(config-if)# end

Router#

Related Commands

interface pos

show interface pos

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Cisco 12012 Información técnica Pagina 34