H3C S7500E Series Ethernet Switches Operation Manual

Operation Manual – IP Addressing and Performance

H3C S7500E Series Ethernet Switches Chapter 2 IP Performance Configuration

2-3

II. Network diagram

Figure 2-1 Network diagram for receiving and forwarding directed broadcasts (on a

switch)

III. Configuration procedure

z Configure Switch A

# Enable Switch A to receive directed broadcasts.

<SwitchA> system-view

[SwitchA] ip forward-broadcast

# Configure IP addresses for VLAN-interface 3 and VLAN-interface 2.

[SwitchA] interface vlan-interface 3

[SwitchA-Vlan-interface3] ip address 1.1.1.2 24

[SwitchA-Vlan-interface3] quit

[SwitchA] interface vlan-interface 2

[SwitchA-Vlan-interface2] ip address 2.2.2.2 24

# Enable VLAN-interface 2 to forward directed broadcasts.

[SwitchA-Vlan-interface2] ip forward-broadcast

z Configure Switch B

# Enable Switch B to receive directed broadcasts.

<SwitchB> system-view

[SwitchB] ip forward-broadcast

# Configure a static route to the host.

[SwitchB] ip route-static 1.1.1.1 24 2.2.2.2

# Configure an IP address for VLAN-interface 2.

[SwitchB] interface vlan-interface 2

[SwitchB-Vlan-interface2] ip address 2.2.2.1 24

After the above configurations, if you ping the subnet broadcast address (2.2.2.255) of

VLAN-interface 2 of Switch A on the host, the ping packets can be received by

VLAN-interface 2 of Switch B. However, if you disable the ip forward-broadcast

command, the ping packets can not be received by the VLAN-interface 2 of Switch B.