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Configuration Guide - Ethernet Switching

S7700 and S9700 V200R011C10

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 VSI. When a destination host joins multiple VLANs or VSIs, the host's MAC address corresponds to multiple VLAN IDs or VSIs in the MAC address table. Table 2-2 lists four MAC address entries, which specify the outbound interfaces for packets with specified destination MAC addresses and VLAN IDs or VSI names. For example, the first MAC address entry is used to forward the packets with destination MAC address 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-Trunk20

0011-0022-0035

huawei

GE2/0/5

Functions

A 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 the destination MAC address MAC3 and VLAN 10 in the packets to obtain outbound interface Port3. The switch then forwards packets to PC3 from Port3.

Figure 2-1  Forwarding based on the MAC address table
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Updated: 2019-10-18

Document ID: EDOC1000178310

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