H3C Technologies H3C S12500 Series Switches - Manual (Page 223)

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Step Command Remarks
1. Enter system view. system-view N/A
2. Enable IPv6. ipv6 By default, IPv6 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 a 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
IPv6 link-local address
configuration is optional.
By default:
• No IPv6 global unicast address
or site-local address is
configured for the tunnel
interface.
• A link-local address will
automatically be generated
when an IPv6 global unicast or
site-local address is configured
for the interface.
5. Specify the automatic
IPv4-compatible IPv6
tunnel mode.
tunnel-protocol ipv6-ipv4 auto-tunnel
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.
7. Configure the IPv6 MTU
on the tunnel interface.
ipv6 mtu mtu-size
Optional.
By default, the IPv6 MTU is 1480
bytes.
Configuration example
IMPORTANT:
By default, Ethernet, VLAN, and aggregate interfaces are down. To configure such an interface, bring the
interface up by executing the undo shutdown command.
Network requirements
As shown in Figure 89 , two IPv6 networks are connected to an IPv4 network through dual-stack switches
Switch A and Switch B. Configure an automatic IPv4-compatible IPv6 tunnel between Switch A and
Switch B to make the two IPv6 networks reachable to each other.