[lug] MAC Addresses and IPv6 Question

[Zan Lynx]

On 12/8/2020 6:52 PM, D. Stimits wrote:
> Hi,
> I recently added some logging for firewall on a new Ubuntu install, and 
> have noticed that when blocking an IPv6 address, the MAC address is 14 
> bytes (versus the IPv4 showing 6 bytes). Is a 14-byte MAC address part 
> of IPv6 (seems like it shouldn't be due to being a PHY, but this is the 
> association I've seen)? What is the meaning of a 14-byte MAC?

That might be the entire Ethernet frame header. MAC Dest (6) + MAC 
Source (6) + EtherType (2)


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