Isatap Tunnel Configuration Instance - D-Link xStack DGS-3610 Series Configuration Manual

DGS-3610 Series Configuration Guide
33.4.3 ISATAP Tunnel Configuration
Instance
Figure 33-6
As shown in the above figure, it is one typical topology by use of an ISATAP tunnel. The
ISATAP tunnel is used to communicate between isolated IPv4/IPv6 dual stack hosts inside
the IPv4 site. The ISATAP router has the following two functions inside the ISATAP site:
Receive a router request packet from the ISATAP host inside the site and then respond

with a router advertisement packet for the ISATAP host inside the site to be
automatically configured.
Be responsible for packet forwarding of the ISATAP host inside the site and the IPv6

host outside the site.
In the above figure, when Host A and Host B send router requests to ISATAP Router, ISATAP
Router will respond with a router advertisement packet. After receiving the packet, the hosts
configure automatically and generate their own ISATAP addresses respectively. Then, the
IPv6 communication between Host A and Host B will be done via the ISATAP tunnel. When
Host A or Host B need communicate with the IPv6 host outside the site, Host A sends the
packet to the ISATAP router RT-A via the ISATAP tunnel and then RT-A forwards the packet
to the IPv6 network.
In the above figure, ISATAP Router (RT-A) is configured as follows:
# Connect the interfaces of the IPv4 network
interface FastEthernet 0/1
no switchport
(the ISATAP address to be
automatically configured)
the ISATAP address to be
automatically configured
Chapter 33 IPV6 Tunnel Configuration
The configuration on the
tunneling interface
FF02 : :1
33-15