Configuration Example - HP FlexNetwork MSR2003 Configuration Manual

Step
6. (Optional.) Set the DF bit for
tunneled packets.

Configuration example

Network requirements
As shown in
Configure an IPv4 over IPv4 tunnel between Router A and Router B to make the two subnets
reachable to each other.
Figure 127 Network diagram
Configuration procedure
Make sure Router A and Router B can reach each other through IPv4.
•
Configure Router A:
# Specify an IPv4 address for GigabitEthernet 2/0/1.
<RouterA> system-view
[RouterA] interface gigabitethernet 2/0/1
[RouterA-GigabitEthernet2/0/1] ip address 10.1.1.1 255.255.255.0
[RouterA-GigabitEthernet2/0/1] quit
# Specify an IPv4 address for Serial 2/1/0, which is the physical interface of the tunnel.
[RouterA] interface serial 2/1/0
[RouterA-Serial2/1/0] ip address 2.1.1.1 255.255.255.0
[RouterA-Serial2/1/0] quit
# Create the IPv4 over IPv4 tunnel interface Tunnel 1.
[RouterA] interface tunnel 1 mode ipv4-ipv4
# Specify an IPv4 address for the tunnel interface.
[RouterA-Tunnel1] ip address 10.1.2.1 255.255.255.0
# Specify the IP address of Serial 2/1/0 as the source address for the tunnel interface.
[RouterA-Tunnel1] source 2.1.1.1
# Specify the IP address of Serial 2/1/1 on Router B as the destination address for the tunnel
interface.
[RouterA-Tunnel1] destination 3.1.1.1
[RouterA-Tunnel1] quit
# Configure a static route destined for IPv4 group 2 through the tunnel interface.
[RouterA] ip route-static 10.1.3.0 255.255.255.0 tunnel 1
•
Configure Router B:
# Specify an IPv4 address for GigabitEthernet 2/0/1.
Figure 127, the two subnets IPv4 group 1 and IPv4 group 2 use private IPv4 addresses.
Command
tunnel dfbit enable
307
Remarks
By default, the DF bit is not set for
tunneled packets.