ipv4 and ipv6 arista management

conf
enable

set

interface management 1

ipv6 address 2a0b:603:f1:d109::2/64
ipv6 route ::/0 2a0b:603:f1:d109::1

where

2a0b:603:f1:d109::2/64 – ipv6 client address

2a0b:603:f1:d109::1 – ipv6 gateway