Third-Party Pos Interfaces C2 Byte And Scrambling Values; Configuring Spe Scrambling; Monitoring And Verifying Pos - Cisco ONS 15454 SDH Configuration Manual

Chapter 5 Configuring POS
Table 5-5
Signal Label
0x16
0x1B

Third-Party POS Interfaces C2 Byte and Scrambling Values

If a Cisco POS interface fails to come up when connected to a third-party device, confirm the scrambling
and cyclic redundancy check (CRC) settings as well as the advertised value in the C2 byte. On routers
from Juniper Networks, configuring RFC 2615 mode sets the following three parameters:
•
•
•
Previously, when scrambling was enabled, these third-party devices continued to use a C2 value of 0xCF,
which did not properly reflect the scrambled payload.

Configuring SPE Scrambling

SPE scrambling is on by default. To configure POS SONET/SDH Payload (SPE) scrambling, perform
the following steps, beginning in global configuration mode:
Command
Step 1
Router(config)# interface pos
number
Step 2
Router(config-if)# no pos
scramble-spe
Step 3
Router(config-if)# no shutdown
Step 4
Router(config-if)# end
Step 5
Router# copy running-config
startup-config

Monitoring and Verifying POS

The show controller pos
C2 value. Thus, changing the value on the local end does not change the value in the show controller
command output.
Example 5-1
ML_Series# sh controllers pos 0
Interface POS0
Hardware is Packet/Ethernet over Sonet
Framing Mode: HDLC
C2 Byte and Scrambling Default Values (continued)
SONET/SDH Payload Contents
Cisco HDLC or PPP/BCP with scrambling
GFP-F
Scrambling enabled
C2 value of 0x16
CRC-32
[0 | 1]
show controller pos [0 | 1] Command
Cisco ONS 15454 and Cisco ONS 15454 SDH Ethernet Card Software Feature and Configuration Guide, R8.0
Purpose
Enters interface configuration mode and specifies the POS
interface to configure.
Disables payload scrambling on the interface. Payload
scrambling is on by default.
Enables the interface with the previous configuration.
Returns to the privileged EXEC mode.
(Optional) Saves configuration changes to NVRAM.
command (Example 5-1) outputs the receive and transmit values and the
Monitoring and Verifying POS
5-9