Netopia r6100 参考指南

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WAN and System Configuration   8-3
Line configuration
Select ADSL (WAN Module 1) Setup. 
The ADSL Line Configuration screen appears.
On ADSL WAN inter faces, the ATM connection between the router and the central office equipment (DSLAM) is 
divided logically into one or more vir tual circuits (VCs). A vir tual circuit may be either a permanent vir tual circuit 
(PVC) or a switched vir tual circuit (SVC). Netopia Routers suppor t PVCs.
VCs are identified by a Vir tual Path Identifier (VPI) and Vir tual Channel Identifier (VCI). A VPI is an 8-bit value 
between 0 and 255, inclusive, while a VCI is a 16-bit value between 0 and 65535, inclusive.
The Netopia R6000 Series suppor ts up to eight PVCs on these inter faces.
Circuits suppor t attributes in addition to their VPI and VCI values. When configuring a circuit, you can 
specify an optional circuit name of up to 14 characters. The circuit name is used only to identify the circuit 
for management purposes as a convenience to aid in selecting circuits from lists. The default circuit name 
is “Circuit <n>”, where <n> is some number between one and eight corresponding to the circuit’s position 
in the list of up to eight circuits.
You can also individually enable or disable a circuit without deleting it. This is useful for temporarily 
removing a circuit without losing the configured attributes.
In order to function, each circuit must be bound to a Connection Profile or to the Default Profile. Among 
other attributes, the profile binding specifies the IP addressing information for use on the circuit. Each 
circuit must be bound to a distinct Connection Profile. You cannot bind multiple circuits to the same 
Connection Profile. Thus it is not possible to construct point-to-multipoint meshes with ATM as is possible 
with Frame Relay.
Select Display/Change Circuit and press Return.
                           ADSL Line Configuration
         Display/Change Circuit...
         Add Circuit...
         Delete Circuit...
         Data Link Encapsulation...         RFC1483
         RFC1483 Mode...                    Bridged 1483