
Configuring ATM Services
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When you accept the default, Unspecified, the LEC obtains the maximum data
frame size when it joins an ELAN. However, you can limit the maximum data
frame size that the LEC can transmit to 1516 octets.
Controlling Unknown Frame Distribution
A frame is considered unknown when the LE client does not recognize the
destination MAC address. In this case, the unknown frame goes to the BUS for
distribution. Setting unknown frame variables helps to limit unknown frame traffic
to the BUS.
To control the distribution of unknown frames, you must
• Set the maximum number of unknown frames the LEC can send
• Specify the amount of time allowed to send the unknown frames to the BUS
Setting a Maximum Unknown Frame Count
You can limit the number of unknown frames a LEC sends to the BUS. By default,
a LEC can send only one unknown frame to the BUS within a specified unknown
frame time (see the following section). However, you can allow a LEC to send up
to 10 unknown frames to the BUS within the maximum unknown frame time.
Note: Selecting Manual configuration mode automatically sets the Maximum
Data Frame Size to 1516.
Site Manager: Maximum Data Frame Size: page A-33
Site Manager: Max Unknown Frame Count: page A-35
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