Configuration Example 1 - 3Com MSR 50 Series Configuration Manual

Configuration Example 1

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For the configuration of the MTU of IPv6 packets sent over a tunnel interface, refer
to the ipv6 mtu command in
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CAUTION:
Only one automatic tunnel can be configured at the same tunnel source.
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No destination address needs to be configured for an automatic tunnel
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because the destination address can automatically be obtained from the IPv4
address embedded in the IPv4-compatible IPv6 address.
If the addresses of the tunnel interfaces at the two ends of a tunnel are not in
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the same subnet, a forwarding route through the tunnel to the peer must be
configured so that the encapsulated packet can be forwarded normally. You
can configure static or dynamic routes. For the detailed configuration, refer to
"Static Routing and Dynamic Routing" on page
The automatic tunnel interfaces encapsulated with the same protocol cannot
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share the same source IP address.
Automatic tunnels do not support dynamic routing.
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When you configure a static route, you need to configure a route to the
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destination address (the destination IP address of the packet, instead of the
IPv4 address of the tunnel destination) and set the next-hop to the tunnel
interface number or network address at the local end of the tunnel. Such a
route must be configured at both ends of the tunnel.
Network requirements
Isolated IPv6 networks are interconnected through a 6to4 tunnel established in the
IPv4 network.
Network diagram
Figure 213 Network diagram for a 6to4 tunnel
Eth1/1
2002:0201 :0101 :1::1/64
Host A
2002:0201 :0101 :1::2/64
Configuration procedure
The following example shows how to configure a 6to4 tunnel between border
routers on isolated IPv6 networks. After the IPv4 address 2.1.1.1 is converted into
an IPv6 address, the address prefix is 2002:0201:0101::/64. The configured static
route directs all traffic destined for the IPv6 address with the prefix 2002::/16 to
the tunnel interface of the 6to4 tunnel.
Configuration on Router A.
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"Configuring the Interface MTU" on page
IPv4 netwok
6to4 router
Eth1/0
2.1 .1.1/24
Router A
Configuring 6to4 Tunnel
817.
6to4 router
Eth1 /0
5.1.1 .1/24
Eth1/1
2002 :0501 :0101 :1::1/64
Router B
Host B
2002 :0501:0101 :1 ::2/64
709
670.