D-Link DES-3028, Cli Reference Manual, Page: 350 / 358

DES-3028 DES-3028P DES-3028G DES-3052 DES-3052P Layer 2 Fast Ethernet Switch CLI Reference Manual
345
Port1 00-20-5C-01-11-11
In addition, when the switch receives the broadcasted ARP request, it will flood the frame to all ports except the source port, port
1 (see Figure – 2).
Figure – 2
When the switch floods the frame of the ARP request to the network, all PCs will receive and examine the frame but only PC B
will reply to the query because the destination IP matches (see Figure – 3).
Figure – 3
When PC B replies to an ARP request, its MAC address will be written into the “Target H/W Address” table in the ARP payload
shown in Table-3. The ARP reply will be then encapsulated into the Ethernet frame again and sent back to the sender. The ARP
reply is the form of a Unicast communication.
H/W
type Protocol
type H/W
address
length Protocol
address
length Operation
ARP reply
Sender
H/W address
00-20-5C-01-11-11
Sender
protocol
address
10.10.10.1
Target
H/W address
00-20-5C-01-22-22
Target
protocol
address
10.10.10.2
Table – 3 (ARP Payload)
Port 4
Port 1
Port 2
Port 3
D
C
00-20-5C-01-33-33
10.10.10.3
00-20-5C-01-44-44
10.10.10.4
00-20-5C-01-11-11
10.10.10.1
00-20-5C-01-22-22
10.10.10.2
B
A
Sender
Port 4
Port 1
Port 2
Port 3
D
C
00-20-5C-01-33-33
10.10.10.3
00-20-5C-01-44-44
10.10.10.4
00-20-5C-01-11-11
10.10.10.1
00-20-5C-01-22-22
10.10.10.2
B
A
Target
I am 10.10.10.2
Forwarding Table
Who is 10.10.10.2?
Who is 10.10.10.2?