Mac Address Table - Planet IXT-900-1X1UP User Manual

User's Manual of IXT-900 PoE series

4.3.4 MAC Address Table

Switching of frames is based upon the DMAC address contained in the frame. The Managed Media Converter builds up a table
that maps MAC addresses to switch ports for knowing which ports the frames should go to (based upon the DMAC address in
the frame). This table contains both static and dynamic entries. The static entries are configured by the network administrator if
the administrator wants to do a fixed mapping between the DMAC address and switch ports.
The frames also contain a MAC address (SMAC address), which shows the MAC address of the equipment sending the frame.
The SMAC address is used by the switch to automatically update the MAC table with these dynamic MAC addresses. Dynamic
entries are removed from the MAC table if no frame with the corresponding SMAC address has been seen after a configurable
age time.
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