Configuration Example - 3Com MSR 50 Series Configuration Manual

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Configuration Example

To do...
Set the tunnel to an ISATAP tunnel
Configure a source address or interface
for the tunnel
Configure the MTU of IPv6 packets sent
over the tunnel interface
For the configuration of the MTU of IPv6 packets sent over a tunnel interface, refer
to the ipv6 mtu command in
CAUTION:
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
The destination address of a tunnel is an ISATAP address. It is required that IPv6
hosts in the IPv4 network can access the IPv6 network via an ISATAP tunnel.
Network diagram
Figure 215 Network diagram for an ISATAP tunnel
IPv6 network
IPv6 host
IPv6 address:
3001 ::2/64
Use the command...
tunnel-protocol
ipv6-ipv4 isatap
source { ip-address |
interface-type
interface-number }
ipv6 mtu mtu-size
"Configuring the Interface MTU" on page
Eth1/0
Eth1/1
3001 ::1 /64
2.1.1.1 /8
ISATAP router
Configuring ISATAP Tunnel
Remarks
Required
By default, the tunnel is a
GRE tunnel. The same
tunnel type should be
configured at both ends
of the tunnel. Otherwise,
packet delivery will fail.
Required
By default, no source
address or interface is
configured for the
tunnel.
Optional
The default value varies
with devices.
670.
817.
IPv4 network
ISATAP host
IPv4 address :
2.1.1.2 /32
IPv6 address :
FE80:5EFE:0201 :0102
2001 :5 EFE0201 :0102
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