You need metroaggrservice license to configure CEM group on the Interface Module.
By deafult, metroaggressive license is enabled for NCS 4200 Series Routers.
Note
Configuring CEM Classes
A CEM class allows you to create a single configuration template for multiple CEM pseudowires. Follow
these steps to configure a CEM class:
• The CEM parameters can be configured either by using CEM class or on CEM interface directly.
• The CEM parameters at the local and remote ends of a CEM circuit must match; otherwise, the pseudowire
between the local and remote PE chassis does not come up.
Note
enable
configure terminal
class cem mycemclass
payload-size 512
dejitter-buffer 12
exit
interface cem 0/0/1
cem 0
cem class mycemclass
xconnect 10.10.10.10 200 encapsulation mpls
exit
Configuring CEM Parameters
The following sections describe the parameters you can configure for CEM circuits.
Configuring Payload Size
To specify the number of bytes encapsulated into a single IP packet, use the payload-size command. The size
argument specifies the number of bytes in the payload of each packet. The range is from 32 to 1312 bytes.
Default payload sizes for an unstructured CEM channel are as follows:
• T1 = 192 bytes
• E1 = 256 bytes
• DS0 = 32 bytes
Default payload sizes for a structured CEM channel depend on the number of time slots that constitute the
channel. Payload size (L in bytes), number of time slots (N), and packetization delay (D in milliseconds) have
the following relationship: L = 8*N*D. The default payload size is selected in such a way that the packetization
delay is always 1 millisecond. For example, a structured CEM channel of 16xDS0 has a default payload size
of 128 bytes.
48-Port T1/E1 CEM Interface Module Configuration Guide, Cisco IOS XE Fuji 16.7.x (Cisco NCS 4200 Series)
19
Overview of Circuit Emulation
Configuring CEM Classes
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