Configuration Example - HP FlexNetwork MSR2003 Configuration Manual

Step
3. Enable the interface to
receive and forward directed
broadcasts destined for the
directly connected network.

Configuration example

Network requirements
As shown in
GigabitEthernet 2/0/1 of Router A. Configure a static route destined for the host on Router B. Router
B can receive directed broadcasts from the host to IP address 2.2.2.255.
Figure 76 Network diagram
Configuration procedure
1. Configure Router A:
# Specify IP addresses for GigabitEthernet 2/0/1 and GigabitEthernet 2/0/2.
<RouterA> system-view
[RouterA] interface gigabitethernet 2/0/1
[RouterA-GigabitEthernet2/0/1] ip address 1.1.1.2 24
[RouterA-GigabitEthernet2/0/1] quit
[RouterA] interface gigabitethernet 2/0/2
[RouterA-GigabitEthernet2/0/2] ip address 2.2.2.2 24
# Enable GigabitEthernet 2/0/2 to forward directed broadcasts destined for the directly
connected network.
[RouterA-GigabitEthernet2/0/2] ip forward-broadcast
2. Configure Router B:
# Configure a static route to the host.
<RouterB> system-view
[RouterB] ip route-static 1.1.1.1 24 2.2.2.2
# Specify an IP address for GigabitEthernet 2/0/2.
[RouterB] interface gigabitethernet 2/0/2
[RouterB-GigabitEthernet2/0/2] ip address 2.2.2.1 24
# Enable GigabitEthernet 2/0/2 to receive directed broadcasts destined for the directly
connected network.
[RouterB-GigabitEthernet2/0/2] ip forward-broadcast
After the configurations are completed, if you ping the subnet-directed broadcast address 2.2.2.255
on the host, the interface GigabitEthernet 2/0/2 of Router B can receive the ping packets. If you
remove the ip forward-broadcast configuration on any router, the interface GigabitEthernet 2/0/2 of
Router B cannot receive the ping packets.
Command
ip forward-broadcast
Figure 76, the default gateway of the host is the IP address 1.1.1.2/24 of the interface
187
Remarks
By default, an interface cannot
forward directed broadcasts
destined for the directly connected
network.