I have the following setup

Two machines A and B are connected to the same switch, A has an ipv4 address and an IPV6 address 2001::1, B has an IPV4 address and the gateway is set to What I want to do is to communicate to machine A from machine B using machine A's IPV6 IP address. for example ping6 2001::1 command should successfully run on machine B. Is this possible? If yes, how can I achieve this? I ahve tried 6in4 tunnel but unable to configure it correctly. Both the machines has CentOS 6 installed.