Dynamic Mac Aging - Siemens SCALANCE XB-200 Configuration Manual

5.5.6

Dynamic MAC Aging

Protocol settings and switch functionality
The device automatically learns the source addresses of the connected nodes. This
information is used to forward data frames to the nodes specifically involved. This reduces
the network load for the other nodes.
If a device does not receive a frame whose source address matches a learnt address within
a certain time, it deletes the learnt address. This mechanism is known as "Aging". Aging
prevents frames being forwarded incorrectly, for example when an end device is connected
to a different switch port.
If the check box is not enabled, a device does not delete learnt addresses automatically.
Description of the displayed boxes
The page contains the following boxes:
● Dynamic MAC Aging
Enable or disable the function for automatic aging of learned MAC addresses.
● Aging Time[s]
Enter the time in seconds in steps of 15. After this time, a learned address is deleted if
the device does not receive any further frames from this sender address.
Range of values: 15 - 630 (seconds)
Factory setting: 30
Note
Rounding of the values, deviation from desired value
When you input the Aging Time, note that the WBM rounds to correct values. If you enter
a value that cannot be divided by 15, the value is automatically rounded down.
Steps in configuration
1. Select the "Dynamic MAC Aging" check box.
2. Enter the time in seconds in the "Aging Time[s]" input box.
3. Click the "Set Values" button.
SCALANCE XB-200/XC-200/XP-200 Web Based Management
Configuration Manual, 07/2016, C79000-G8976-C360-04
Configuring with Web Based Management
5.5 The "Layer 2" menu
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