IPv6 Dual Stack question and Tunnel

[news2010a]

Folks, imagine my ISP tells me that PE router is ready for "Dual Stack IPv6 implementation".

My CE router is already configured to support dual stack as well.

My question:
In dual stack, I will need to establish a tunnel of some sort right? I mean, usng Dual Stack I still need to plan to do GRE or "automatic tunnel"?

Please clarify since this is not very clear.

[vilaxmi]

Hello,

YES even with dual stack you will still need to configure tunneling for communications between two IPv6 islands..over IPv4 cloud.

Options available in dual stacking mode are :-

1.  Manually configured tunnels [pt to pt]

2.  GRE tunnel [Pt to pt..Can carry CLNS traffic too for IS IS  too..!]

3  Automatic ipv4 compatible tunnels [DEPRECATED..pt to mpt, Cisco recommends using ISATAP tunneling instead]

HTH

Vijaya