Configuring the Circuit Emulation over Packet Shared Port Adapter
Configuring a CEM Group
To configure a CEM group to represent a CEM circuit on a SPA port, perform the following steps:
The first cem-group command under the controller creates a CEM interface that has the same slot /subslot
Note
/port information as the controller. The CEM interface is removed when all of the CEM groups under the
interface is deleted.
• The CEM interface is always up, even if the controller state is down. This allows the CEM pseudowire
SUMMARY STEPS
1. Router(config)# controller type slot/subslot/port
2. Router(config-controller)# [no] cem-group group-number {unframed | timeslots timeslot}
3. Router(config-controller)# exit
DETAILED STEPS
Command or Action
Step 1
Router(config)# controller type slot/subslot/port
Example:
Router(config)# controller t1
3/1/Router(config)# controller sonet 2/0/1
Step 2
Router(config-controller)# [no] cem-group
group-number {unframed | timeslots timeslot}
Example:
Router(config)# controller t1
3/2/0Router(config-controller)# cem-group
1 unframedRouter(config)# controller t1
3/2/1Router(config-controller)# cem-group
1 timeslots
1,3,5-11Router(config-controller)#
cem-group 2 timeslots 12-24Router(config)#
controller t3 3/2/0
Example:
Router(config-controller)#
1 timeslots 1
OL-14127-17
to carry alarm information to the remote end.
t1 1 cem-group
Cisco ASR 1000 Series Aggregation Services Routers SIP and SPA Software Configuration Guide, Cisco IOS XE
Purpose
Selects the controller for the port that is being configured:
• type identifies the port type. Depending on the card type, the valid
values are t1, e1, t3, e3, or sonet. For additional information about
the card types, see the
• slot /subslot /port identifies the SPA slot, subslot, and the port.
Creates a CEM circuit (group) from one or more time slots of the line
connected to this port. To delete the CEM circuit and release the time
slots, use the no cem-group group-number command.
• group-number assigns a CEM circuit number:
◦ For 24 T1/E1 Channelized ATM CEoP SPA, you can
configure up to 191 CEM groups.
◦ For 2-Port Channelized T3/E3 ATM CEoP SPA, you can
configure up to 576 CEM groups.
◦ For 1-Port Channelized OC-3 STM1 ATM CEoP SPA, you
can configure up to 576 CEM groups.
• unframed creates a single CEM circuit from all the time slots, and
uses the framing on the line. Use this keyword for the SAToP
mode.
Configuring a CEM Group
Setting the Card Type, page 15-2
Everest 16.5
section.
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