Configuration Guide Configuring Interfaces
Run ping 192.168.2.2 and ping 192.168.1.1 respectively on Router A and Router C to achieve route-based
communication on Router B.
1.3 Features
Basic Concepts
Interface Types
Interfaces on Ruijie Networks AP devices are classified into two categories:
Local Area Network (LAN) interface
Logical interface
1. Common LAN interfaces fall into the following types:
Ethernet interface (FE and GE)
2. Common logical interfaces fall into the following types:
Sub interface
Loopback interface
Null interface
Tunnel interface
Ethernet Interface
An Ethernet interface is a single physical interface on a device mainly used for LAN communication. Ethernet interfaces
include 10M Ethernet interfaces and 10M/100M FE interfaces, which comply with 10Base-T and 100Base-TX standards
respectively. 10Base-T Ethernet interfaces work at 10 Mbps in full-duplex or half-duplex mode. Compatible with 10Base-T
interfaces, 100Base-TX interfaces can work at 10 Mbps and 100 Mbps in full-duplex or half-duplex mode at the same time.
100Base-TX interfaces feature auto-negotiation which identifies Ethernet interfaces on other devices automatically.
Sub Interface
A sub interface is a logical interface derived from a physical interface. One physical interface may be configured with multiple
sub interfaces. In this way, high flexibility is provided for applications. Sub interfaces are multiple logical interfaces derived
from a physical interface. In other words, the multiple logical interfaces are associated with the physical interface, and they
share the configurations of the physical interface while having their own configurations at link layer and network layer.
Loopback Interface
A loopback interface is a local logical Layer-3 interface that is completely emulated by software and is always linked. Packets
sent to a loopback interface are processed on the device locally, including routing information. The IP address of a loopback
interface can be used as the router ID (RID) for the OSPF routing protocol, the network interface ID replied to Telnet access
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