Configuring Vt Ds1 Satop Mode; Configuring Payload Size (Optional) - Cisco ASR 900 Series Configuration Manual

Configuring CEM

Configuring Payload Size (Optional)

To specify the number of bytes encapsulated into a single IP packet, use the pay-load 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
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.
The payload size must be an integer of the multiple of the number of time slots for structured CEM channels.
Setting the Dejitter Buffer Size
To specify the size of the dejitter-buffer used to compensate for the network filter, use the dejitter-buffer
command. The configured dejitter-buffer size is converted from milliseconds to packets and rounded up to
the next integral number of packets. Use the size argument to specify the size of the buffer, in milliseconds.
The range is from 1 to 32; the default is 5.
Shutting Down a CEM Channel
To shut down a CEM channel, use the shutdown command in CEM configuration mode. The shutdown
command is supported only under CEM mode and not under the CEM class.
Configuring DS1 CT3 SAToP Mode on OCx Ports
To configure DS1 CT3 SAToP mode on OCx ports, use the following commands:
enable
configure terminal
controller MediaType 0/4/16
mode sonet
controller sonet 0/4/16
rate oc12
sts-1 1
mode ct3
t1 1 cem-group 100 unframed
t1 1 framing unframed
interface cem 0/4/16
cem 100
xconnect 2.2.2.2 10 encapsulation mpls
end

Configuring VT DS1 SAToP Mode

To configure VT DS1 SAToP mode, use the following commands:
enable
configure terminal
controller MediaType 0/4/16
mode sonet
controller sonet 0/4/16
1 port OC48/ 4 port OC12/OC3 + 12 port T1/E1 + 4 port T3/E3 CEM Interface Module Configuration Guide, Cisco IOS
Configuring CEM Parameters
XE Fuji 16.7.x (Cisco ASR 900 Series)
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