H3C Technologies H3C S12500 Series Switches - Manual (Page 232)

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Configuration guidelines
Follow these guidelines when you configure an ISATAP tunnel:
• No destination address needs to be configured for an ISATAP tunnel. The destination address of the
tunnel can be automatically obtained through the IPv4 address embedded in the ISATAP address.
• To encapsulate and forward IPv6 packets whose destination address does not belong to the subnet
where the current tunnel interface resides, you must 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 address as the next hop. Similar configuration is required 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, see Layer 3—IP Routing Configuration Guide.
• The automatic tunnel interfaces using the same encapsulation protocol cannot share the same
source IP address.
Configuration procedure
To configure an ISATAP tunnel:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enable IPv6. ipv6
By default, the IPv6 forwarding function
is disabled.
3. Create a tunnel
interface and enter
tunnel interface view.
interface tunnel number
By default, there is no tunnel interface
on the switch.
4. Configure an IPv6
address for the tunnel
interface.
• Configure an IPv6 global unicast
address or site-local address:
{
ipv6 address { ipv6-address
prefix-length |
ipv6-address/prefix-length }
{
ipv6 address
ipv6-address/prefix-length
eui-64
• Configure an IPv6 link-local
address:
{
ipv6 address auto link-local
{
ipv6 address ipv6-address
link-local
The IPv6 link-local address
configuration is optional.
By default:
• No IPv6 global unicast address is
configured for the tunnel interface.
• A link-local address will
automatically be generated when
an IPv6 global unicast address or
link-local address is configured.
5. Specify the ISATAP
tunnel mode.
tunnel-protocol ipv6-ipv4 isatap
By default, the tunnel is a GRE over
IPv4 tunnel.
The same tunnel mode should be
configured at both ends of the tunnel.
Otherwise, packet delivery will fail.
6. Configure a source
address or interface for
the tunnel.
source { ip-address | interface-type
interface-number } By default, no source address or
interface is configured for the tunnel.