11

CONFIGURING LOGICAL INTERFACE

 

 

This chapter contains information on the following topics:

 

Logical Interface Introduction

 

Dialer Interface

 

Loopback Interface

 

Null Interface

 

Sub-Interface

 

Standby Center Logic Channel

 

Virtual-Template and Virtual Interface

 

 

Logical Interface

The logical interface refers to the interface that can exchange data, but does not

Introduction

exist physically and needs to be established through configuration, including the

 

Dialer interface, loopback interface, null interface, sub-interface, standby center

 

logic channel and virtual-template.

 

 

Dialer Interface

Dialer interface is used for dialup. Dial-supporting interfaces on the 3Com Router

 

series include synchronous serial interface, asynchronous serial interface, ISDN BRI

interface and ISDN PRI interface. The 3Com Router realizes the Bandwidth on Demand Routing (BDR) function, and provides two BDR configuration methods: Legacy BDR and BDR profiles. Please see Operation Manual - Dial-upfor detailed information.

Configure Dialer Interface

According to different BDR modes, configurations of Dialer interface are:

Configure Dialer interface for Legacy BDR

Configure Dialer interface for BDR profiles

Please see related chapters in Operation Manual - Dial-upfor detailed description, monitoring and maintenance, typical configuration example, fault diagnosis and troubleshooting of the configurations of BDR.

Loopback Interface It is prescribed in TCP/IP that the network segment 127.0.0.0 is loopback address. The interface with the loopback address is called loopback interface. The 3Com Router series define interface Loopback0 as the loopback interface, which can receive all the packets destined for this router. The addresses on the loopback interfaces can neither be configured nor be advertised by routing protocols.

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3Com 10014299 manual Logical Interface, Dialer Interface