Hello,
Today I will share with you the understanding of common interface types.
Interface introduction
By understanding common interface types, it is convenient for users to manage interfaces.
The interface of the device is the part where the system of the device exchanges data and interacts with other devices in the network. It is divided into two types: physical interface and logical interface.
Description
Different products support different interface types, please refer to the actual situation of the device.
Physical interface
The physical interface is an interface that actually exists and is supported by the corresponding device.
The physical interface is divided into:
LAN side interface:
The device can exchange data with network devices in the local area network through it.
WAN side interface:
The device can exchange data with network devices in the WAN through it.
The specific description of various physical interfaces is shown in Table 1.
Table 1 Classification of physical interfaces
Interface classification | Interface Type | description |
LAN side interface | FE (Fast Ethernet) interface | The FE interface on the LAN side works at the data link layer and processes Layer 2 protocols to realize Layer 2 fast forwarding. |
GE (Gigabit Ethernet) interface | The GE interface on the LAN side works at the data link layer and processes the Layer 2 protocol to realize Layer 2 fast forwarding. | |
WAN side interface | FE interface | The FE interface on the WAN side works at the network layer and can be configured with an IP address, handles the three-layer protocol, and provides routing functions. |
GE interface | The GE interface on the WAN side works at the network layer and can be configured with an IP address, handles the three-layer protocol, and provides routing functions. | |
CE1 interface | The channelized E1 interface can be configured with an IP address and handles the three-layer protocol. The logic characteristics are the same as the synchronous serial port. The interface can be configured to work in different working modes to support PPP, FR, ISDN and other applications. | |
E1 interface | The E1 interface refers to a partially channelized E1 interface, which is a simplified version of the CE1 interface. Users can use the E1 interface to meet simple E1 access requirements. | |
SA interface | The serial interface can work in synchronous or asynchronous mode, and is called synchronous serial port or asynchronous serial port respectively. Support the configuration of link layer protocols such as PPP on the synchronous serial port; support the configuration of asynchronous serial port working parameters (such as stop bits, data bits, etc.). | |
ADSL interface | The ADSL interface utilizes unused high frequency bands in ordinary telephone lines, and can provide asymmetrical uplink and downlink rates on a pair of ordinary copper twisted-pair wires to achieve high-speed data transmission. | |
3G interface | The 3G interface is used to manage and maintain 3G devices connected to the device. It can be configured with an IP address and supports the configuration of the PPP protocol. | |
G.SHDSL interface | The G.SHDSL interface makes use of the unused high frequency band in ordinary telephone lines, and can provide symmetrical uplink and downlink rates on a pair of ordinary copper twisted pair wires to achieve high-speed data transmission. |
Description
The device supports the configuration of FE, GE, E1, CE1, and SA interfaces under the interface node. When realizing wireless or XDSL access through 3G, ADSL or G.SHDSL interfaces, please refer to Wireless & DSL.
Logical interface
Logical interface refers to the interface that can realize data exchange function but does not exist physically and needs to be established through configuration. The specific description of various logical interfaces is shown in Table 2.
Table 2 Classification of logical interfaces
Interface classification | Interface Type | description |
LAN side interface | Interface aggregation (Eth-Trunk interface) | A logical interface with Layer 2 characteristics, which logically equates multiple Layer 2 Ethernet interfaces to one logical interface, and has greater bandwidth and higher reliability than Ethernet interfaces. |
WAN side interface | VT (Virtual Template) interface | Virtual interface template. When PPP protocol is needed to carry other link layer protocols, it can be realized by configuring virtual interface template. |
VE (Virtual Ethernet) interface | The virtual Ethernet interface is mainly used for the Ethernet protocol to carry other data link layer protocols. | |
MP-Group interface | The dedicated interface of MP can realize the bundling of multiple PPP links, which is usually used in those occasions with dynamic bandwidth requirements. | |
Dialer interface | For the logical interface set by configuring DCC parameters, the physical interface can be bound to the Dialer interface to inherit the configuration information. | |
Tunnel interface | A tunnel is a virtual point-to-point connection that provides a transmission path for encapsulated data packets. Tunnel interface is the logical interface set up for tunnel establishment. | |
NULL interface | Because any network data message sent to this interface will be discarded, it is mainly used for routing filtering and other features. | |
VLAN interface | A logical interface with three-layer characteristics, through the configuration of the VLAN interface IP address, to achieve mutual access between VLANs. | |
Sub interface | A sub-interface is a virtual interface configured on a main interface, which is mainly used to implement communication with multiple remote ends. | |
Interface aggregation (Eth-Trunk interface) | A logical interface with three-layer characteristics, which logically equates multiple three-layer Ethernet interfaces to one logical interface, and has greater bandwidth and higher reliability than Ethernet interfaces. | |
Local loopback interface (Loopback interface) | The main application is that the interface status is always Up and the 32-bit subnet mask can be configured. |
Description
When using VLAN interface, sub-interface, interface aggregation, and local loopback interface, you need to perform related configuration under the interface node. MP-Group and NULL interfaces do not support configuration via Web. When the other logical interfaces are implemented on the Web, they are already bound to the specific functions of the application of these interfaces, and there is no need to create and configure them separately.
You are welcome to leave a message and exchange in the comment area. Thank you!
