Protocols and standards, Tunneling configuration task list, Configuring a tunnel interface – H3C Technologies H3C S10500 Series Switches User Manual
Page 164: Configuration guidelines
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NOTE:
GRE can realize the IPv6 over IPv6 tunnel function. For more information about related configurations, see
the chapter “GRE configuration.”
Protocols and standards
•
RFC 1853, IP in IP Tunneling
•
RFC 2473, Generic Packet Tunneling in IPv6 Specification
•
RFC 2893, Transition Mechanisms for IPv6 Hosts and Routers
•
RFC 3056, Connection of IPv6 Domains via IPv4 Clouds
•
RFC 4214, Intra-Site Automatic Tunnel Addressing Protocol (ISATAP)
Tunneling configuration task list
Complete the following tasks to configure the tunneling feature:
Task Remarks
Configuring a tunnel interface
Required
Configuring an IPv6 manual tunnel
Configuring an
IPv6 over IPv4
tunnel
Optional
Use one as needed.
Configuring an IPv4 over IPv4 tunnel
Optional
Configuring an IPv4 over IPv6 manual tunnel
Optional
Configuring an IPv6 over IPv6 tunnel
Optional
Configuring a tunnel interface
Configure a Layer 3 virtual tunnel interface on each device on a tunnel so that devices at both ends can
send, identify, and process packets from the tunnel.
Configuration guidelines
Follow these guidelines when you configure a tunnel interface:
•
Before configuring a tunnel interface on a switch, you may need create a service loopback group
with its service type as Tunnel, and add unused Layer 2 Ethernet interfaces of the switch to the
service loopback group.
•
On the switch, an encapsulated packet cannot be forwarded a second time at Layer 3 by using the
destination address and routing table, but is sent to the loopback interface, which then sends the
packet to the forwarding module for Layer 3 forwarding. You must reference a service loopback
group on the tunnel interface. Otherwise, the tunnel interface will not be up and packets cannot be