H3C Technologies H3C SR8800 - Manual (Page 8)

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Configuring Ethernet interfaces
NOTE:
In this documentation, SPE cards refer to the cards prefixed with SPE, for example, SPE-1020-E-II.
Ethernet interface overview
Ethernet is the most widespread wired LAN technology due to its flexibility, simplicity, and easy
implementation. Your router supports the following types of Ethernet interfaces:
• Layer 2 Ethernet interfaces—They are physical interfaces operating on the data link layer for Layer
2 packet forwarding. They can only forward packets carrying source and destination IP addresses
that belong to the same network segment.
• Layer 3 Ethernet interfaces—They are physical interfaces operating on the network layer for Layer
3 packet forwarding, and forward packets carrying source and destination IP addresses that
belong to different network segments. You can assign an IP address to a Layer 3 Ethernet interface.
• Layer 2-Layer 3 Ethernet interfaces—They are physical interfaces that can operate on both the data
link layer and the network layer. When operating on the data link layer, a Layer 2-Layer 3 Ethernet
interface acts as a Layer 2 Ethernet interface. When operating on the network layer, a Layer 2-Layer
3 Ethernet interface acts as a Layer 3 Ethernet interface.
• Layer 3 Ethernet subinterfaces—They are logical interfaces operating on the network layer. You
can assign an IP address to a Layer 3 Ethernet subinterface. By creating subinterfaces on a Layer 3
Ethernet interface, you can enable the interface to carry packets for multiple VLANs, which provides
great networking flexibility.
• Virtual Ethernet interfaces—Including Layer 3 Virtual-Ethernet (VE) interfaces and Layer 2 VE
(VE-bridge) interfaces. They are used on interface modules for carrying data link layer protocols
over Ethernet.
Performing general configurations
This section describes the attributes and configurations common to Layer 2 and Layer 3 Ethernet
interfaces/subinterfaces. For more information about the attributes and configuration, see “ Configuring
a Layer 2 Ethernet interface ” and “ Configuring a Layer 3 Ethernet interface or subinterface .”
Configuring a combo interface
Introduction to combo interfaces
A combo interface is a logical interface that comprises one optical (fiber) port and one electrical (copper)
port. The two ports cannot work simultaneously. When you enable one port, the other is automatically
disabled.
The fiber combo port and copper combo port share the same interface view, in which you can activate
the fiber or copper combo port, and configure other port attributes such as the interface rate and duplex
mode.