Avaya Configuring SMDS Manuale Utente Pagina 20

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Configuring SMDS
1-6
117361-A Rev. A
Figure 1-5. DXI Packet Assembly
PAYLOAD
PAYLOAD PAYLOAD PAYLOAD
Framing field
PAYLOAD PAYLOAD PAYLOAD
Framing field
4-byte trailer
DSU/CSU
Level-2
segmentation
PAYLOAD
PAYLOAD
PAYLOAD
Switch receives LAN packet
DXI trailer
4-byte trailer
36-byte header
DXI header
DXI
Switch
Level-3
encapsulation
SMDS
network
7-byte
header
44-byte
cell
2-byte
trailer
7-byte
header
44-byte
cell
2-byte
trailer
7-byte
header
44-byte
cell
2-byte
trailer
SMS0004A
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