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
/
port
information as the controller. The CEM interface is removed when all of the CEM groups under the
interface is deleted.
Note
•
The CEM interface is always up, even if the controller state is down. This allows the CEM pseudowire
to carry alarm information to the remote end.
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
Purpose
Command or Action
Selects the controller for the port that is being configured:
Router(config)#
controller type slot
/
subslot
/
port
Step 1
Example:
Router(config)# controller t1
3/1/Router(config)# controller sonet 2/0/1
•
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
Setting the Card Type, page 15-2
section.
•
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.
Router(config-controller)# [
no
]
cem-group
group-number
{
unframed
|
timeslots timeslot
}
Example:
Router(config)# controller t1
Step 2
•
group-number
assigns a CEM circuit number:
◦
For 24 T1/E1 Channelized ATM CEoP SPA, you can
configure up to 191 CEM groups.
3/2/0Router(config-controller)# cem-group
1 unframedRouter(config)# controller t1
3/2/1Router(config-controller)# cem-group
◦
For 2-Port Channelized T3/E3 ATM CEoP SPA, you can
configure up to 576 CEM groups.
1 timeslots
1,3,5-11Router(config-controller)#
cem-group 2 timeslots 12-24Router(config)#
controller t3 3/2/0
◦
For 1-Port Channelized OC-3 STM1 ATM CEoP SPA, you
can configure up to 576 CEM groups.
Example:
Router(config-controller)#
t1 1 cem-group
1 timeslots 1
•
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.
Cisco ASR 1000 Series Aggregation Services Routers SIP and SPA Software Configuration Guide, Cisco IOS XE
Everest 16.5
OL-14127-17
499
Configuring the Circuit Emulation over Packet Shared Port Adapter
Configuring a CEM Group