
Configuring ATM and MPLS Services
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Modifying Flush Protocol Variables
The flush protocol ensures that data destined for a particular MAC address arrives
in sequence. This means that after the LEC issues a flush request, the flush
protocol drops any cells it receives for the particular MAC address until:
• The LEC receives a flush response from that MAC address.
• The flush timeout expires for that MAC address.
If the client receives a flush response from the MAC address, the cells for this
MAC address begin flowing over a new virtual circuit. However, if the flush
timeout expires for this MAC address, the cells begin flowing to the BUS.
Disabling and Reenabling the Flush Protocol
You can disable or reenable the flush protocol for any LEC.
When enabled (the default), the flush protocol drops cells with the current
destination MAC address until the LEC receives a flush response for that MAC
address or the flush timeout expires (see “Setting the Flush Timeout
” on
page 8-46
).
When the flush protocol is disabled, cells containing the destination MAC address
are dropped until the path switching delay times out. After the path switching
delay time elapses, the data automatically begins flowing over a new virtual
circuit.
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