VPI dan VCI versi wikipedia :
VPI = Virtual Path Identifier
Virtual Path Identifier refers to an 8-bit (user to network packets) or 12-bit (network-network packets) field within the header of an Asynchronous Transfer Mode packet. The VPI, together with the VCI (Virtual Channel Identifier) is used to identify the next destination of a cell as it passes through a series of ATM switches on its way to its destination. VPI is useful to reduce the switching table for some Virtual Circuits which have common path.
VCI = Virtual channel identifier
A Virtual Channel Identifier (VCI) is a unique identifier which indicates a particular virtual circuit on a network. It is a 16-bit field in the header of an ATM cell. The VCI, together with the VPI (Virtual Path Identifier) is used to identify the next destination of a cell as it passes through a series of ATM switches on its way to its destination.
ATM switches use the VPI/VCI fields to identify the virtual channel link {VCL} of the next network that a cell needs to transit on its way to its final destination. The function of the VCI is similar to that of the data-link connection identifier DLCI in Frame Relay and the Logical Channel Number & Logical Channel Group Number in X.25.
Sementara untuk settingan nilai VPI dan VCI di berbagai daerah di Indonesia bisa lihat dalam postingan di forum “Pojok Kang Onno” berikut ini :
http://opensource.telkomspeedy.com/forum/viewtopic.php?pid=2101#p2101
A. Jakarta
1. Untuk DSLAM buatan Alcatel-Lucent (France)
Encapsulation = PPPoA � VPI = 8 � VCI = 35
Sumber Info: [1]
2. Untuk DSLAM buatan Huawei Technologies Co Ltd (China)
Encapsulation = PPPoE � VPI = 0 � VCI = 35
Sumber Info: [1]
3. Untuk DSLAM buatan Siemens AktienGesellschaft (Germany)
Encapsulation = PPPoA � VPI = 1 � VCI = 33
Sumber Info: [1]
B. Sumatra, Jawa Barat, Jawa Tengah, Jawa Timur, Bali, Kalimantan, Sulawesi
1. Untuk DSLAM buatan ZTE (ZhongXing Telecommunication Equipment Co Ltd)(China)
Encapsulation = PPPoE � VPI = 8 � VCI = 81
Sumber Info: [1]
2. Untuk DSLAM buatan Huawei Technologies Co Ltd (China)
Encapsulation = PPPoE � VPI = 0 � VCI = 35
Sukrawan
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