
To configure scrambling, use the following commands:
Purpose
Command
Enters global configuration mode.
Router#
configure terminal
Selects the interface to configure and enters interface
configuration mode.
Router(config)#
interface serial slot/subslot/port
Enables scrambling. Scrambling is disabled by
default.
•
scramble
—
Enables scramble.
•
no scramble
—
Disables scramble.
When using framing bypass, no scrambling
must be configured.
Note
Router(config-if)# [no]
scramble
Verifying Scramble Configuration
Use the show controllers serial command to display the scrambling setting:
Router# show controllers serial 2/0/0
Serial2/0/0 -
Framing is c-bit, Clock Source is Line
Bandwidth limit is 44210, DSU mode 0, Cable length is 10
rx FEBE since last clear counter 2, since reset 0
Scrambling is enabled
Data in current interval (356 seconds elapsed):
0 Line Code Violations, 0 P-bit Coding Violation
0 C-bit Coding Violation
0 P-bit Err Secs, 0 P-bit Sev Err Secs
0 Sev Err Framing Secs, 0 Unavailable Secs
0 Line Errored Secs, 0 C-bit Errored Secs, 0 C-bit Sev Err Secs
Data in Interval 1:
0 Line Code Violations, 0 P-bit Coding Violation
0 C-bit Coding Violation
0 P-bit Err Secs, 0 P-bit Sev Err Secs
0 Sev Err Framing Secs, 0 Unavailable Secs
0 Line Errored Secs, 0 C-bit Errored Secs, 0 C-bit Sev Err Secs
Configuring Framing
Framing is used to synchronize data transmission on the line. Framing allows the hardware to determine when
each packet starts and ends. To configure framing, use the following commands:
Purpose
Command
Enters global configuration mode.
Router#
configure terminal
Selects the interface to configure and enters interface
configuration mode.
Router(config)#
interface serial slot/subslot/port
Cisco ASR 1000 Series Aggregation Services Routers SIP and SPA Software Configuration Guide, Cisco IOS XE
Everest 16.5
OL-14127-17
265
Configuring the 2-Port and 4-Port T3/E3 Serial SPA
Optional Configurations