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Local Area High Speed Networks by Dr. Sidnie Feit

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The Link Aggregation Control Protocol

This section outlines the major features of the protocol structure. Virtual links are created, monitored, and updated by means of an exchange of protocol messages.

Link aggregation protocol messages are exchanged across each link segment. They belong to real links rather than virtual links. The source address in each of the frames is the source MAC address of the real port from which it was sent.

Slow Protocols

Link aggregation belongs to a family called slow protocols. The characteristics of an Ethernet slow protocol are listed here:

  • No more than five frames are transmitted in any 1-second period.

  • Protocol messages are carried in frames addressed to a special multi-cast address assigned to the slow ...

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