Configuring A Gre/Ipv6 Tunnel; Configuration Guidelines; Configuration Procedure - HPE FlexNetwork 10500 Series Configuration Manual

Step
9. (Optional.) Configure the
device to discard IPv6
packets with
IPv4-compatible IPv6
addresses.

Configuring a GRE/IPv6 tunnel

Perform this task to configure a GRE tunnel on an IPv6 network.

Configuration guidelines

Follow these guidelines when you configure a GRE/IPv6 tunnel:
•
You must configure the tunnel source address and destination address at both ends of a tunnel.
The tunnel source or destination address at one end must be the tunnel destination or source
address at the other end.
•
As a best practice, do not configure the same tunnel source and destination addresses for local
tunnel interfaces that use the same tunnel mode.
•
To ensure correct packet forwarding, identify whether the destination network of packets and
the IP address of the local tunnel interface are on the same subnet. If they are not, configure a
route reaching the destination network through the tunnel interface. You can configure the route
by using the following methods:
Configure a static route, using the local tunnel interface as the outgoing interface of the

route.
Enable a dynamic routing protocol on both the tunnel interface and the interface connecting

the private network. This allows the dynamic routing protocol to establish a routing entry
with the tunnel interface as the outgoing interface.
•
The IP address of the tunnel interface and the tunnel destination address configured on the
tunnel interface must be in different subnets.
•
You must create a service loopback group, specify its service type as tunnel, and add an
unused Layer 2 Ethernet interface to the service Loopback group. For more information about
service loopback groups, see Layer 2—LAN Switching Configuration Guide.
For information about tunnel interfaces, the interface tunnel, source, destination, and tunnel
discard ipv4-compatible-packet commands, and additional configuration commands on a tunnel
interface, see

Configuration procedure

To configure a GRE/IPv6 tunnel:
Step
1. Enter system view.
2. Create a GRE tunnel
interface, and specify the
tunnel mode as GRE/IPv6.
Command
tunnel discard
ipv4-compatible-packet
"Configuring tunneling."
Command
system-view
interface tunnel
interface-number mode gre ipv6
275
Remarks
By default, the device does not
discard such IPv6 packets.
Remarks
N/A
By default, no tunnel interfaces
exist.
You must configure the same
tunnel mode on both ends of a
tunnel. Otherwise, packet delivery
might fail.