H3C Technologies H3C S7500E Series Switches - Manual (Page 181)

15-24
To do… Use the command… Remarks
Configure an IPv4 address
for the tunnel interface
ip address ip-address { mask |
mask-length } [ sub ]
Required
By default, no IPv4 address is
configured for the tunnel interface.
Specify the IPv4 over IPv4
tunnel mode
tunnel-protocol ipv4-ipv4
Optional
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.
Configure a source address
or interface for the tunnel
interface
source { ip-address |
interface-type interface-number }
Required
By default, no source address or
interface is configured for the tunnel.
Configure a destination
address for the tunnel
interface
destination ip-address
Required
By default, no destination address is
configured for the tunnel.
z To encapsulate and forward IPv6 packets whose destination address does not belong to the
network segment where the receiving tunnel interface resides, you need to 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 as the next hop. A similar configuration needs to be performed 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, refer to Static Routing
Configuration or other routing protocol configurations in the Layer 3 - IP Routing Configuration
Guide..
z The IPv4 address and the destination address of a tunnel interface cannot be in the same network
segment.
z The destination address of a route with a tunnel interface as the egress interface and the
destination address of the tunnel interface must not be in the same network segment.
z Two or more tunnel interfaces using the same encapsulation protocol must have different source
and destination addresses.
z If you specify a source interface instead of a source address for the tunnel, the source address of
the tunnel is the primary IP address of the source interface.