SwitchMaster™/SwitchMasterFL™
Learn Addresses
When a data packet is received by the bridge, the source identifier and
LAN are copied from the packet header and stored in the address cache.
Then, when later packets are received, the bridge compares the
destination identifier of the received packet with cache addresses. If a
match is found, the bridge “knows” the destination LAN and sends the
data packet out only on the known destination LAN.
A possible sequence of events is:
1. Source #1 sends data packet intended for destination #1.
2. Bridge copies data packet #1 with source identifier and LAN into
cache, then waits.
3. Source #2 sends data packet intended for destination #2.
4. Bridge copies data packet #2 with source identifier and LAN into
cache, then waits.
5. Source #3 sends data packet intended for destination #3.
6. Bridge copies data packet #3 with source identifier and LAN into
cache, then “knows” destination #3 as source #1.
7. Bridge sends data packet #1 for unknown destination #1 over all
LANs except LAN from which data packet #1 was received.
8. Bridge sends data packet #2 for unknown destination #2 over all
LANs except LAN from which data packet #2 was received.
9. Bridge sends data packet #3 for destination #3 (also source #1)
over destination #3 /source #1 LAN.
10. Destination #1 receives data packet #1.
11. Destination #2 receives data packet #2.
12. Destination #3 receives data packet #3.
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