RFC1483ATM上的多协议封装( 二 )


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RFC 1483Multiprotocol over AAL5July 1993
AAL5 CPCS-PDU Format
The Payload field contains user information up to 2^16 - 1 octets. The PAD field pads the CPCS-PDU to fit exactly into the ATM cells such that the last 48 octet cell payload created by the SAR sublayer will have the CPCS-PDU Trailer right justified in the cell.The CPCS-UU (User-to-User indication) field is used to transparently transfer CPCS user to user information.The field has no function under the multiprotocol ATM encapsulation described in this memo and can be set to any value.The CPI (Common Part Indicator) field alings the CPCS-PDU trailer to
The Payload field contains user information up to 2^16 - 1 octets. The PAD field pads the CPCS-PDU to fit exactly into the ATM cells such that the last 48 octet cell payload created by the SAR sublayer will have the CPCS-PDU Trailer right justified in the cell. The CPCS-UU (User-to-User indication) field is used to transparently transfer CPCS user to user information.The field has no function under the multiprotocol ATM encapsulation described in this memo and can be set to any value.

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