Cisco ASR 900 Series Manual page 143

Circuit Emulation Service over UDP
Command or Action
Step 11
exit
Example:
Router(config-pw-class)# exit
Step 12 controller {e1 | t1} slot / subslot / port
Example:
Router(config)# controller e1 0/1/8
Step 13 clock source {internal | line | loop}
Example:
Router(config-controller)# clock source
internal
Step 14 framing number {esf | sf | crc4 | no-crc4 |
unframed}
Example:
Router(config-controller)# framing unframed
Step 15 cem-group number unframed
Example:
Router(config-controller)# cem-group 5
unframed
Step 16
exit
Example:
Router(config-controller)# exit
Purpose
Exits pseudowire-class configuration mode.
Enters E1/T1 controller configuration mode.
Enters controller configuration mode and sets the clock source
on the interface to:
• Internal–The system clock selection process does not select
clock source as the interface but it uses the system clock for
TX.
• Line–The system clock selection process selects the clock
source line as the interface and uses the system clock for
TX.
• Loop–The system clock selection process selects the clock
source line as the interface. For TX clock the interface uses
the clock source received on the same interface.
Note By default, the clock source on the interface is set to
internal.
Use the framed keyword to specify Extended Superframe or
Superframe framing.
Use the unframed keyword to specify that a single CEM channel
is being created including all time slots and the framing structure
of the line.
Note For SAToP circuits, framing should always be
unframed.
Assigns channels on the T1/E1 circuit to the circuit emulation
(CEM) channel.
Exits controller configuration.
MPLS Basic Configuration Guide, Cisco IOS XE Everest 16.5.1 (Cisco ASR 900 Series)
Structure-Agnostic TDM over Packet over UDP
135