Chapter 1 Mac Address Table Management; Introduction To Mac Address Table - H3C S3100-52P Operation Manual

Operation Manual – MAC Address Table Management
H3C S3100-52P Ethernet Switch

Chapter 1 MAC Address Table Management

When configuring MAC address table management, go to these sections for
information you are interested in:
Overview
Configuring MAC Address Table Management
Displaying MAC Address Table Information
Configuration Example
Note:
This chapter describes the management of static, dynamic, and blackhole MAC
address entries. For information about the management of multicast MAC address
entries, refer to the part related to multicast protocol.
The function of destination MAC address triggered update was introduced. For
more information, refer to
The function of assigning MAC addresses to Ethernet ports was introduced. For
more information, refer to
1.1 Overview

1.1.1 Introduction to MAC Address Table

An Ethernet switch is mainly used to forward packets at the data link layer, that is,
transmit the packets to the corresponding ports according to the destination MAC
address of the packets. To forward packets quickly, a switch maintains a MAC address
table, which is a Layer 2 address table recording the MAC address-to-forwarding port
association. Each entry in a MAC address table contains the following fields:
Destination MAC address
ID of the VLAN which a port belongs to
Forwarding egress port numbers on the local switch
When forwarding a packet, an Ethernet switch adopts one of the two forwarding
methods based upon the MAC address table entries.
Unicast forwarding: If the destination MAC address carried in the packet is
included in a MAC address table entry, the switch forwards the packet through the
forwarding egress port in the entry.
Enabling Destination MAC Address Triggered
Assigning MAC Addresses for Ethernet
1-1
Chapter 1 MAC Address Table
Management
Update.
Ports.