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Incoming I/O
Manager ASIC
When a data packet is passed from the receiving
interface to its connected FPC, it is received by the I/O Manager
ASIC on that specific FPC. During the processing of the packet by
this ASIC, the information in the packet’s header is examined
by a behavior aggregate (BA) classifier. This classification action
associates the packet with a particular forwarding class. In addition,
the value of the packet’s loss priority bit is set by this classifier.
Both the forwarding class and loss priority information are placed
into the notification cell, which is then transmitted to the Internet
Processor II ASIC.
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