R3303-HP HSR6800 Routers Layer 3 - IP Services Configuration Guide

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Configuration guidelines
Follow these guidelines when you configure an IPv4 over IPv4 tunnel:
• If the destination IPv4 network is not on the same subnet as the IPv4 address of the local tunnel
interface, you must configure a route destined for the destination IPv4 network through the tunnel
interface. You can configure a static route, and specify the local tunnel interface as the output
interface or specify the IPv4 address of the peer tunnel interface as the next hop. Alternatively, you
can enable a dynamic routing protocol on both tunnel interfaces to achieve the same purpose. For
the detailed configuration, see Layer 3—IP Routing Configuration Guide.
• The IPv4 address of the local tunnel interface cannot be on the same subnet as the destination
address configured on the tunnel interface.
• The destination address of the route passing the tunnel interface must not be on the same subnet as
the destination address configured on the tunnel interface.
• Two or more local tunnel interfaces using the same encapsulation protocol must have different
source and destination addresses.
• If you specify a source interface instead of a source address for a tunnel interface, the source
address of the tunnel is the primary IP address of the source interface.
Configuration procedure
To configure an IPv4 over IPv4 tunnel:
Step Command Remarks
1. Enter system view.
system-view N/A
2. Enter tunnel interface view.
interface tunnel number N/A
3. Configure an IPv4 address
for the tunnel interface.
ip address ip-address { mask |
mask-length } [ sub ]
By default, no IPv4 address is
configured for the tunnel interface.
4. Specify the IPv4 over IPv4
tunnel mode.
tunnel-protocol ipv4-ipv4
The default mode is GRE. The same
tunnel mode should be configured at
both ends of the tunnel. Otherwise,
packet delivery fails.
5. Configure a source address
or interface for the tunnel
interface.
source { ip-address |
interface-type interface-number }
By default, no source address or
interface is configured for the tunnel.