288
Figure 105 Forwarding
• As shown in Figure 106, when Host A sends an Ethernet frame to Host B, as Host B is on the
same LAN segment as Host A, the bridge filters the Ethernet frame instead of forwarding it.
Figure 106 Filtering
• As shown in Figure 107, when Host A sends an Ethernet frame to Host C, if the bridge does not
find a MAC-to-interface mapping about Host C in its bridge table, the bridge forwards the
Ethernet frame to all interfaces except the interface on which the frame was received.
Host A
Host B
Host C Host D
LAN segment 2
LAN segment 1
Bridge
Bridge interface 1
Source address Destination address
00e0.fcbb.bbbb 1
00e0.fccc.cccc 2
00e0.fcaa.aaaa 1
00e0.fcdd.dddd 2
MAC address Interface
Bridge table
00e0.fcaa.aaaa 00e0. fccc. cccc
00e0.fcaa.aaaa 00e0.fccc.cccc
MAC address: 00e0.fccc .cccc
MAC address: 00e0. fcaa.aaaa
MAC address: 00e0.fcbb.bbbb
MAC address: 00e 0.fcdd.dddd
Source address
Destination address
Bridge interface 2
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