Refer to the Exhibit.
After the MAC learning limit of 3000 is reached for the bd bridge domain as shown in the exhibit, what happens to frames that arrive that contain unknown unicast destination addresses?
A.
They are flooded.
B.
The are forwarded to the default gateway.
C.
They are dropped.
D.
They are forwarded to the IRB interface.
Option A, Final Answer.
By default, when the bridge domain MAC learning limit is reached, the device does not learn any more MAC addresses but still forwards or floods traffic in the case of unknown destinations.
This a precautionary measure by MAC address learning to avoid dropping a valuable MAC.
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However, if you do not want the MAC addresses learnt after the the MAC learning limit is reached to be flooded, then you have to configure a corresponding action to be taken.
Example.,
set bridge-domain bd vlan-id 100 bridge-options mac-table-size 3000
set bridge-domain bd vlan-id 100 bridge-options mac-table-size packet-action drop.
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