Digitalchina Networks DCS-3950 series User Manual

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DCS-3950 series Ethernet switch manual
Chapter 8 MAC Table Configuration
8.1 Introduction to MAC Table
MAC table is a table identifies the mapping relationship between destination MAC
addresses and switch ports. MAC addresses can be categorized as static MAC addresses
and dynamic MAC addresses. Static MAC addresses are manually configured by the user,
have the highest priority and are permanently effective (will not be overwritten by dynamic
MAC addresses); dynamic MAC address is entries learnt by the switch in data frame
forwarding, and is effective for a limited period. When the switch receives a data frame to
be forwarded, it stores the source MAC address of the data frame and creates a mapping
to the destination port. Then the MAC table is queried for the destination MAC address, if
hit, the data frame is forwarded in the associated port, otherwise, the switch forwards the
data frame to its broadcast domain. If a dynamic MAC address is not learnt from the data
frames to be forwarded for a long time, the entry will be deleted from the switch MAC
table.
There are two MAC table operations:
1. Obtain a MAC address;
2. Forward or filter data frame according to the MAC table.
8.1.1 Obtaining MAC Table
The MAC table can be built up statically and dynamically. Static configuration is to set
up a mapping between the MAC addresses and the ports; dynamic learning is the process
in which the switch learns the mapping between MAC addresses and ports, and updates
the MAC table regularly. In this section, we will focus on the dynamic learning process of
MAC table.
Connect port 5
Connect port 12

Digitalchina Networks DCS-3950 series Specifications

General

Brand	Digitalchina Networks
Model	DCS-3950 series
Category	Network Router
Language	English