HP 6125XLG Configuration Manual page 195

Step
4. Configure a source
address or source
interface for the tunnel
interface.
5. Configure a destination
address for the tunnel
interface.
6. (Optional.) Enable GRE
keepalive and set the
keepalive interval and
keepalive number.
7. (Optional.) Set the DF
bit for encapsulated
packets.
8. Return to system view.
9. (Optional.) Configure
the device to discard
IPv6 packets with
IPv4-compatible IPv6
addresses.
For information about tunnel interfaces and more configuration commands on a tunnel interface, see
"Configuring tunneling."
For more information about the interface tunnel, source, destination, tunnel dfbit enable, and tunnel
discard ipv4-compatible-packet commands, see Layer 3—IP Services Command Reference.
Command
source { ip-address | interface-type
interface-number }
destination ip-address
keepalive [ interval [ times ] ]
tunnel dfbit enable
quit
tunnel discard ipv4-compatible-packet
187
Remarks
By default, no source address or
interface is configured for a tunnel
interface.
If you configure a source address
for a tunnel interface, the tunnel
interface uses the source address
as the source address of the
encapsulated packets.
If you configure a source interface
for a tunnel interface, the tunnel
interface uses the primary IP
address of the source interface as
the source address of the
encapsulated packets.
By default, no destination address
is configured for a tunnel interface.
The destination address is the
address of the physical interface
that the tunnel remote end uses to
receive packets from the GRE
tunnel.
The tunnel local end uses this
address as the destination address
of the encapsulated packets.
By default, GRE keepalive is
disabled.
By default, the DF bit is not set,
allowing encapsulated packets to
be fragmented.
N/A
By default, the device does not
discard such IPv6 packets.