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DES-7200 Configuration Guide Chapter 2 MAC Address Configuration
2-5
MAC address, the inconsistency of the hardware address table of
the master and slave devices occurs. Send the packets destined
to MAC1 address to other ports of the device A, those packets can
not be broadcasted to the device B for the reason that the MAC1
address has already been learned by the stack port of the device
B. After this MAC address ages out, the packets are broadcasted
to the port of the device B.
2.1.2.3 Address Aging
The capacity of MAC address is restricted. The switch updates the MAC
address list by learning new addresses and aging out unused addresses.
For an address in the MAC address table, if the switch has not received any
packet from the MAC address for a long time (depending on the aging time), the
address will be aged out and removed from the MAC address table.
2.1.3 Management
Learning mode
of the Dynamic
Address
DES-7200 high-density modular Ethernet switches support the management
learning mode of the dynamic address, including:
z Uniform MAC address learning mode
z Dispersive MAC address learning mode
2.1.3.1 Uniform MAC address
learning mode
A. Operation Mechanism
In this mode, multiple line cards in the switch learn the MAC addresses, with
each line card learning the MAC address independently. The MAC address
learn process is described as follows:
The UserA under the Line Card1 sends the packets to the UserB. For the MAC
address for the UserB does not exist on the switch, the packets will be sent to
all line cards on the switch in broadcast form.