Forwarding and filtering, Figure 295 – H3C Technologies H3C MSR 50 User Manual

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Figure 295 The bridge determines that Host B is also attached to interface 1

Finally, the bridge obtains all the MAC-interface mappings (assume that all hosts are in use), as shown
in

Figure 296

Figure 296 The final bridge table

Forwarding and filtering

The bridge makes data forwarding or filtering decisions based on the following scenarios:

•

When Host A sends an Ethernet frame to Host C, the bridge searches its bridge table and finds out
that Host C is attached to bridging interface 2, and forwards the Ethernet frame out of bridging

interface 2, as shown in

Figure 297

Host A

Host B

Host C

Host D

LAN segment 2

LAN segment 1

Bridge

Bridge interface 1

Bridge interface 2

00e0.fcbb. bbbb

00e0 .fcaa.aaaa

Source address

Destination address

00e 0.fcbb.bbbb

00e 0.fcaa.aaaa

MAC address

Interface

Bridge table

MAC address: 00e0.fcaa.aaaa

MAC address: 00e0.fccc.cccc

MAC address: 00e0.fcdd.dddd

MAC address: 00e0.fcbb.bbbb