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1. HOW TO USE ARP COMMAND TO FIND MAC ADDRESS FULL
2. HOW TO USE ARP COMMAND TO FIND MAC ADDRESS MAC
3. HOW TO USE ARP COMMAND TO FIND MAC ADDRESS WINDOWS

HOW TO USE ARP COMMAND TO FIND MAC ADDRESS MAC

You can also leave off the -6 to include IPv4 to MAC info.

HOW TO USE ARP COMMAND TO FIND MAC ADDRESS FULL

The full command is ip -6 neigh show, but the show is implied if omitted. The ip command is /sbin/ip which is part of the iproute or iproute2 package in most distributions. In IPv6 there is no broadcast, but there are various multicast scopes to address the link-local domain, the site-local domain and other domains. The ff02: addresses are multicast addresses.

IPv6 is geared for 64-bit unique identifiers, and there is a standard conversion to represent MACs as EIU-64 addresses. Current Ethernet MAC’s are 48-bit addresses. I will also draw your attention to the fact that the physical MAC address is transliterated and somewhat recognizable in the internet address for link local addresses and most non-private addresses. Most machines will have the public IPv6 address and a link-local IPv6 address, usually starting with fe80. The duplicates are because each MAC has multiple IPv6 address scopes. I think this is dumb, and it can be turned off by “netsh interface ipv6 set privacy state=disabled” on each machine.

HOW TO USE ARP COMMAND TO FIND MAC ADDRESS WINDOWS

My Windows boxes by default use temporary IPv6 addresses than change periodically to attempt some measure of privacy. The unreachables are due to privacy addresses. You may notice some duplicate and unreachable physical (MAC) addresses. # Interface 12: Teredo Tunneling Pseudo-Interface

# Interface 1: Loopback Pseudo-Interface 1 The full command is netsh interface ipv6 show neighbors, but the Windows built-in netsh allows you to abbreviate commands. IPv6 ‘arp’ For Windows: netsh int ipv6 show neigh On Windows use netsh int ipv6 show neigh, on Linux use ip -6 neigh , and in MacOS use ndp -a in place of arp -a.

IPv6 uses Neighbor Discovery Protocol in place of IPv4’s arp. When migrating to IPv6 you may wonder the equivalent of arp is when you are trying to match MAC addresses with IP addresses.