01-09-2019 11:24 PM - edited 03-08-2019 05:00 PM
why the destination mac addrss in the arp request packet can either be 0000-0000-0000 or FFFF-FFFF-FFFF?
01-09-2019 11:33 PM - edited 01-09-2019 11:43 PM
Hi there,
An ARP request with all zero's is used when the sender is sending a packet for which it only knows the destination IP. You will find this in the ARP packet (Target MAC) itself.
An frame with all F's in the destination MAC is used when the sender is broadcasting to the local segment, ie, gratuitous ARP.
Cheers,
Seb.
01-10-2019 01:11 AM
01-10-2019 02:17 AM
The Ethernet frame must always use all F's for the destination MAC address to function as a broadcast.
The Target MAC address specified in the ARP packet itself can be either all 0's or F's, it can vary depending on vendor implementation.
cheers,
Seb.
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