H3C Technologies H3C S7500E Series Switches - Manual (Page 191)

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z To encapsulate and forward IPv6 packets whose destination address does not belong to the
network segment where the receiving tunnel interface resides, you need to configure a static route
or dynamic routing for forwarding those packets through this tunnel interface. If you configure a
static route to that destination IPv6 address, specify this tunnel interface as the outbound interface,
or the peer tunnel interface as the next hop. A similar configuration needs to be performed at the
other tunnel end. If you configure dynamic routing at both ends, enable the dynamic routing
protocol on both tunnel interfaces. For the detailed configuration, refer to Static Routing
Configuration or other routing protocol configurations in the Layer 3 - IP Routing Configuration
Guide.
z The IPv6 address and the destination address of a tunnel interface must not be in the same
network segment.
z The destination address of a route with the tunnel interface as the egress interface and the
destination address of the tunnel interface must not be in the same network segment.
z Two or more tunnel interfaces using the same encapsulation protocol must have different source
and destination addresses.
z If you specify a source interface instead of a source address for the tunnel, the source address of
the tunnel is the primary IP address of the source interface.
z Only the IPv6 over IPv6 tunnel has a maximum number of nested encapsulations for a packet.
Configuration Example
Network requirements
The two subnets Group 1 and Group 2 running IPv6 are interconnected by using an IPv6 over IPv6
tunnel between Switch A and Switch B.
Figure 15-13 Network diagram for an IPv6 over IPv6 tunnel
Configuration procedure