Avaya Configuring ATM DXI Services Manuale Utente Pagina 28

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Configuring ATM DXI Services
2-4 117375-A Rev. A
Figure 2-2. AAL Layer Division between Bridge/Router and DSU/CSU
ATM DXI Error Checking
The ATM DXI verifies
That the VPI/VCI is valid for the PVCs configured for that ATM circuit.
The header format that the value of the DXI Mode parameter defines.
That the BTag field in the CS_PDU header is equal to the ETag field in the
CS_PDU trailer and ensures that the frame size is valid. If the packet contains
an invalid header, the router drops the packet, updates the appropriate MIB
statistic, and logs the appropriate event.
Upper
layer
protocols
SAR
sublayer
Bridge/Router
DSU/CSU
Multiprotocol
encapsulation
Convergence
sublayer
Physical
layer
AAL
ATM DXI
ATM DXI
ATM DXI
ATM0008A
ATM
layer
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