# Ethernet Features Overview

Ethernet modules support the following Ethernet interfaces:

- Fast Ethernet
- Gigabit Ethernet
- 10-Gigabit Ethernet

This section describes features that are available with Ethernet interfaces.

Ethernet modules use the Address Resolution Protocol (ARP) to obtain MAC addresses for outgoing Ethernet frames. For more information about ARP, see JunosE IP, IPv6, and IGP Configuration Guide .

| Note: Read Configuring Ethernet Interfaces before you begin to configure an Ethernet interface.

Ethernet interfaces support the following features:

- Routing of IP packets.
- Quality of Service (QoS) classification.
- High-density Ethernet. (For information, see High-Density Ethernet Overview.)
- Virtual LAN (VLAN) configurations. (For information, see JunosE Link Layer Configuration Guide.)
- Stacked Virtual LAN (S-VLAN) configurations. (For information, see JunosE Link Layer Configuration Guide.)
- IEEE 802.3ad link aggregation configurations. (For information, see JunosE Link Layer Configuration Guide.)
- Configurations with upper-layer protocols. (For information, see JunosE Link Layer Configuration Guide.)
- Layer 2 Tunneling Protocol (L2TP. For information, see JunosE Link Layer Configuration Guide.)
- Multinetting. (For information, see JunosE Link Layer Configuration Guide.)

#### Related Documentation

- Ethernet Interface Platform Considerations
- Fast Ethernet I/O Modules Overview
- Gigabit Ethernet I/O Modules and IOAs Overview