Overview of Logical Interfaces

Eth-Trunk interface

Has Layer 2 or Layer 3 features. An Eth-Trunk interface is formed by binding multiple Ethernet interfaces to provide more bandwidth and higher transmission reliability.

For details about how to configure an Eth-Trunk interface, see Link Aggregation Configuration in the NetEngine AR Configuration Guide: LAN.

Virtual-Template (VT) interface

Used when PPP needs to transmit packets of other link layer protocols.

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Virtual-Ethernet (VE) interface

Used when other data link layer protocols need to be carried by the Ethernet protocol.

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MP-Group interface

Used to perform MP binding. MP group interfaces are dedicated to the MP application and usually used in scenarios requiring dynamic bandwidth.

For details about how to configure an MP Group interface, see MP Configuration in the NetEngine AR Configuration Guide: WAN.

Dialer interface

Used to implement the Dialer Control Center (DCC) function. A physical interface can be bound to a dialer interface to inherit the configuration of the dialer interface.

For details about how to configure a dialer interface, see DCC Configuration in the NetEngine AR Configuration Guide: WAN.

Tunnel interface

Has Layer 3 features, transmits packets, and identifies and processes packets transmitted over a tunnel.

For details about how to configure a tunnel interface, see GRE Configuration in the NetEngine AR Configuration Guide: VPN.

VLANIF interface

Has Layer 3 features and enables VLANs to communicate after being assigned an IP address.

For details about how to configure a VLANIF interface, see VLAN Configuration in the NetEngine AR Configuration Guide: LAN Configuration.

Sub-interface

A sub-interface is a virtual interface configured on a physical interface to allow a physical link to communicate with multiple remote devices.

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MFR interface

If a single FR link cannot provide sufficient bandwidth, and multiple FR physical links exist between devices, you can bundle these FR physical links into a Multilink Frame Relay (MFR) link to increase bandwidth.

For details about how to configure an MFR interface, see FR Configuration in the NetEngine AR Configuration Guide: WAN Interconnection.

Loopback interface

A loopback interface is always Up and can be configured with a 32-bit subnet mask.

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NULL interface

Used in route filtering because any network packets sent to this interface are discarded.

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Bridge interface

A bridge interface has Layer 3 features and enables users on different network segments on a transparent bridge to communicate with each other after being assigned an IP address.

For details about how to configure a bridge interface, see Transparent Bridging Configuration in the NetEngine AR Configuration Guide: LAN Configuration.

Wlan-Radio interface

Wlan-Radio interface is a kind of logical interface. You can configure the radio after creating a wlan-radio interface.

For details about how to configure a Wlan-Radio interface, see the NetEngine AR Configuration Guide: WLAN-FAT AP.

WLAN-BSS interface

A WLAN-BSS interface is a virtual Layer 2 interface. Similar to a Layer 2 Ethernet interface of the hybrid type, a WLAN-BSS interface has Layer 2 attributes and supports multiple Layer 2 protocols. After creating a WLAN-BSS interface, bind a service set to the interface.

For details about how to configure a WLAN-BSS interface, see the NetEngine AR Configuration Guide: WLAN-FAT AP.