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Ethernet-Ready Announcement Format The Ethernet-ready announcement frame is made in the form of a BOOTP request so it can use a standard format. No response is processed for this message and it is constructed so that most—if not all—BOOTP and DHCP servers will discard it. The announcement frame is sent every three seconds (the time interval between the packets varies with the clock input); no retransmission is done. The frame uses the DIX MAC Header format. The MAC header contains: • Destination MAC address = H-MAC addr (from boot parameters, normally FF:FF:FF:FF:FF:FF) • Source MAC address = this device’s MAC addr (from boot parameters) • Type = IPV4 (0x800)
