VPI dan VCI

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.

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
Sumber Info: [1]

Semua wilayah di Bandung: DSLAM = ZTE
Sumber Info: [3] pada [2007-02-22 ±19:41 WIB]

diedit dari WPKO : (Waroeng Pojok Kang Onno).