W300D Wireless-N ADSL2+ Router
Hence the na
me, "virtual path identifier." The
VPI is used in conjunction with the VCI, or
virtual channel identifier.
VCI：
Stands for "Virtual Channel Identifier." The
VCI indicates where an ATM cell is to travel
over a network. The VCI within each ATM cell
defines the fixed channel on which the packet
of information should be sent. It is a 16-bit
field, compared to the VPI, which is only 8
bits. Since this numerical tag specifies the
virtual channel that each packet belongs to, it
prevents interference with other data being
sent across the network.
Bridging：
Here is related to the well-known RFC1483
bridging protocol. This feature is working on
the basic bridging protocol and physical layer.
In this device, Modem serves as a bridge
device, and does not provide any protocol
transfer and address filtering features. In this
case, the Modem actually plays the role as
Hub.
IPoA：
It is related to RFC1577. Usually the data
97
