33.4 IPv6 Tunnel Configuration
Instances
The following chapters/sections introduce IPv6 tunnel configuration instances.
Manual IPv6 Tunnel Configuration Instance
6to4 Tunnel Configuration Instance
ISATAP Tunnel Configuration Instance
Configuration Instance for Composite Application of ISATAP and 6to4 Tunnels
33.4.1 Manual IPv6 Tunnel Configuration
Instance
Figure 33-4
As shown in the above figure, IPv6 networks N1 and N2 are isolated by the IPv4 network.
Two networks can beinterconnected through manual tunnel configuration, for example, the
H-A3 host in N1 can access the H-B3 host in N2 through configuration.
In the figure, both RT-A and RT-B support the IPv4 and IPv6 protocol stacks. Tunnel
configuration is performed on the Area Border Routers (RT-A and RT-B) in N1 and N2. Note
that manual tunnel must be configured symmetrically, that is, manual tunnels must be
configured on RT-A and RT-B.
The specific configurations related to the tunnel are respectively as follows:
Prerequisite: Suppose the routes of IPv4 are connected. No more route configuration about
IPv4 is described.
RT-A configuration
#Connect the interfaces of the IPv4 network
interface FastEthernet 2/1
no switchport
ip address 192.1.1.1 255.255.255.0
#Connect the interfaces of the IPv6 network
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