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S12700 V200R010C00 Configuration Guide - Ethernet Switching

This document describes the configuration of Ethernet services, including configuring link aggregation, VLANs, Voice VLAN, VLAN mapping, QinQ, GVRP, MAC table, STP/RSTP/MSTP, SEP, and so on.
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Elements and Functions of a MAC Address Table

Elements and Functions of a MAC Address Table

Elements

Each entry in a MAC address table is identified by a MAC address and a VLAN ID or virtual switch interface (VSI). The destination host's MAC address can be bound to multiple VLAN IDs or VSIs in the MAC address table if it joins multiple VLANs or VSIs. Table 2-2 lists four example MAC address entries with their associated VLAN ID/VSI names and outbound interfaces. For example, the first MAC address entry is used to forward the packets destined for 0011-0022-0034 and VLAN 10 through outbound interface GE3/0/1.

Table 2-2  MAC address entries

MAC Address

VLAN ID/VSI Name

Outbound Interface

0011-0022-0034

10

GE3/0/1

0011-0022-0034

20

GE2/0/4

0011-0022-0035

30

Eth-Trunk 20

0011-0022-0035

huawei

GE2/0/5

Functions

The MAC address table is used for unicast forwarding of packets. In Figure 2-1, when packets sent from PC1 to PC3 reach the switch, the switch searches its MAC address table for an entry matching the destination MAC address and VLAN ID of the packet. In this example, it finds that MAC3 and VLAN 10 correspond to the outbound interface Port3. The switch then forwards packets to PC3 through Port3.

Figure 2-1  Forwarding based on the MAC address table
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Updated: 2019-08-21

Document ID: EDOC1000142081

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