H3C Technologies H3C S12500 Series Switches - Manual (Page 11)

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Configuring Ethernet interfaces
Ethernet interface types
Ethernet is the most widespread wired LAN technology due to its flexibility, simplicity, and easy
implementation. Your device supports the following types of Ethernet interfaces:
• Layer 2 Ethernet interfaces—Physical Ethernet interfaces operating at the data link layer (Layer 2)
to switch traffic.
• Layer 3 Ethernet interfaces—Physical Ethernet interfaces operating at the network layer (Layer 3) to
route traffic. You can assign an IP address to a Layer 3 Ethernet interface.
• Layer-configurable Ethernet interfaces—Physical Ethernet interfaces that can be configured to
operate in bridge mode as Layer 2 Ethernet interfaces or in route mode as Layer 3 Ethernet
interfaces.
• Layer 3 Ethernet subinterfaces—Logical interfaces operating at 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 enable the interface to carry packets for multiple VLANs.
The switch does not support Layer 3 Ethernet interfaces, Layer 3 Ethernet subinterfaces, Layer 3
aggregate interfaces, and Layer 3 aggregate subinterfaces when it is operating in standard mode. For
more information about system operating modes, see Fundamentals Configuration Guide. For more
information about the models of the Ethernet interface cards, see the installation guide.
On a switch operating in IRF mode and enabled with enhanced IRF mode, you cannot create Layer 3
Ethernet interfaces, Layer 3 Ethernet subinterfaces, Layer 3 aggregate interfaces, or Layer 3 aggregate
subinterfaces.
Configuring general Ethernet interfaces and
subinterfaces
By default, Ethernet interfaces, VLAN interfaces, and aggregate interfaces are in DOWN state. Before
configuring these interfaces, use the undo shutdown command to bring them up.
Ethernet interface numbering conventions
When the switch operates in standalone mode, an Ethernet interface is numbered in the format of
interface type A/B/C, where:
• A is the slot number of the card where the Ethernet interface resides.
• B is the number of the sub-card where the Ethernet interface resides.
If the card does not have any sub-card, B is fixed at 0.
• C is the interface number.
When the switch operates in IRF mode, an Ethernet interface is numbered in the format of interface type
A/B/C/D, where: