Table of Contents

1 IP Addressing and Performance Configuration Guide· 1-1

Configuring IP Addressing· 1-1

Network Diagram·· 1-1

Networking and Configuration Requirements· 1-1

Applicable Product Matrix· 1-1

Configuration Procedure· 1-2

Complete Configuration· 1-3

Configuration Guidelines· 1-3

Configuring IP Performance· 1-3

Network Diagram·· 1-3

Networking and Configuration Requirements· 1-3

Applicable Product Matrix· 1-3

Configuration Procedure· 1-4

Complete Configuration· 1-5

Configuration Guidelines· 1-5

 

Configuring IP Addressing

Network Diagram

Figure 1-1 Network diagram for IP address configuration

 

Networking and Configuration Requirements

As shown in the above figure, VLAN-interface 1 on Switch is connected to a LAN in which hosts belong to two subnets: 172.16.1.0/24 and 172.16.2.0/24. It is required to enable the hosts in the LAN to communicate with external networks through Switch, and to enable the hosts in the two network segments to communicate with each other.

Applicable Product Matrix

Product series	Software version	Hardware version
S3610 Series Ethernet Switches	Release 5301 Release 5303	All versions
S5510 Series Ethernet Switches	Release 5301 Release 5303	All versions
S5500-SI Series Ethernet Switches	Release 1207	All versions except S5500-20TP-SI
	Release 1301	S5500-20TP-SI
S5500-EI Series Ethernet Switches	Release 2102	All versions
S7500E Series Ethernet Switches	Release 6100 Release 6300	All versions
S3500-EA Series Ethernet Switches	Release 5303	All versions

 

Configuration Procedure

Assign a primary IP address and a secondary IP address to VLAN-interface 1 of Switch to ensure that all the hosts on the LAN can access external networks through Switch. Set Switch as the gateway on all the hosts of the two subnets to ensure that they can communicate with each other.

# Assign a primary IP address and a secondary IP address to VLAN-interface 1.

<Switch> system-view

[Switch] interface vlan-interface 1

[Switch-Vlan-interface1] ip address 172.16.1.1 255.255.255.0

[Switch-Vlan-interface1] ip address 172.16.2.1 255.255.255.0 sub

[Switch-Vlan-interface1] return

# Set the gateway address to 172.16.1.1 on the hosts in subnet 172.16.1.0/24, and to 172.16.2.1 on the hosts in subnet 172.16.2.0/24.

# Ping Host B on Switch to verify the connectivity to subnet 172.16.1.0/24.

<Switch> ping 172.16.1.2

  PING 172.16.1.2: 56  data bytes, press CTRL_C to break

    Reply from 172.16.1.2: bytes=56 Sequence=1 ttl=255 time=25 ms

    Reply from 172.16.1.2: bytes=56 Sequence=2 ttl=255 time=27 ms

    Reply from 172.16.1.2: bytes=56 Sequence=3 ttl=255 time=26 ms

    Reply from 172.16.1.2: bytes=56 Sequence=4 ttl=255 time=26 ms

    Reply from 172.16.1.2: bytes=56 Sequence=5 ttl=255 time=26 ms

 

  --- 172.16.1.2 ping statistics ---

    5 packet(s) transmitted

    5 packet(s) received

    0.00% packet loss

round-trip min/avg/max = 25/26/27 ms

Information shows that Switch and Host B are reachable to each other.

# Ping Host A on Switch to verify the connectivity to subnet 172.16.2.0/24.

<Switch> ping 172.16.2.2

  PING 172.16.2.2: 56  data bytes, press CTRL_C to break

    Reply from 172.16.2.2: bytes=56 Sequence=1 ttl=255 time=25 ms

    Reply from 172.16.2.2: bytes=56 Sequence=2 ttl=255 time=26 ms

    Reply from 172.16.2.2: bytes=56 Sequence=3 ttl=255 time=26 ms

    Reply from 172.16.2.2: bytes=56 Sequence=4 ttl=255 time=26 ms

    Reply from 172.16.2.2: bytes=56 Sequence=5 ttl=255 time=26 ms

 

  --- 172.16.2.2 ping statistics ---

    5 packet(s) transmitted

    5 packet(s) received

    0.00% packet loss

    round-trip min/avg/max = 25/25/26 ms

Information shows that Switch and Host A are reachable to each other.

# Ping Host B on Host A to verify the connectivity between subnet 172.16.1.0/24 and subnet 172.16.1.0/24. Ping Host B on Host A to verify that the ping operation is successful.

Complete Configuration

#

interface Vlan-interface1

 ip address 172.16.1.1 255.255.255.0

 ip address 172.16.2.1 255.255.255.0 sub

#

Configuration Guidelines

l          The primary IP address you assigned to the interface can overwrite the old one if there is any.

l          You cannot assign secondary IP addresses to an interface that has BOOTP, or DHCP configured.

l          The primary and secondary IP addresses you assign to the interface can be located on the same network segment. However, this should not violate the rule that different interfaces on the switch must reside on different network segments.

Configuring IP Performance

Network Diagram

Figure 1-2 Network diagram for configuring reception and forwarding of directed broadcasts

 

Networking and Configuration Requirements

As shown in the figure above, the host’s interface and VLAN-interface 3 on Switch A are on the same subnet (1.1.1.0/24). VLAN-interface 2 on Switch A and VLAN-interface 2 on Switch B are on the other subnet (2.2.2.0/24). Set the default gateway on the host to VLAN-interface 3 on Switch A. Configure a static route to the host on Switch B.

Applicable Product Matrix

Product series	Software version	Hardware version
S3610 Series Ethernet Switches	Release 5301 Release 5303	All versions
S5510 Series Ethernet Switches	Release 5301 Release 5303	All versions
S5500-SI Series Ethernet Switches	Release 1207	All versions except S5500-20TP-SI
	Release 1301	S5500-20TP-SI
S5500-EI Series Ethernet Switches	Release 2102	All versions
S7500E Series Ethernet Switches	Release 6100 Release 6300	All versions
S3500-EA Series Ethernet Switches	Release 5303	All versions

 

Configuration Procedure

l          Configure Switch A

# Enable Switch A to receive directed broadcasts.

<SwitchA> system-view

[SwitchA] ip forward-broadcast

# Create VLAN 2 and VLAN 3.

[SwitchA] Vlan 2

[SwitchA-Vlan2] quit

[SwitchA] Vlan 3

[SwitchA–Vlan3] quit

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

[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

l          Configure Switch B

# Enable Switch B to receive directed broadcasts.

<SwitchB> system-view

[SwitchB] ip forward-broadcast

# Create VLAN 2.

[SwitchB] Vlan 2

[SwitchB-Vlan2] quit

# 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 configuration, if you ping the subnet broadcast address (2.2.2.255) on the host, ping packets can be received by VLAN-interface 2 of Switch B. However, if you undo the ip forward-broadcast command, ping packets cannot be received by VLAN-interface 2 of Switch B.

Complete Configuration

l          Configure Switch A

#

 ip forward-broadcast

#

vlan 2

#

vlan 3

#

interface Vlan-interface2

 ip address 2.2.2.2 255.255.255.0

 ip forward-broadcast

#

interface Vlan-interface3

 ip address 1.1.1.2 255.255.255.0

l          Configure Switch B

#

 ip forward-broadcast

#

vlan 2

#

interface Vlan-interface2

 ip address 2.2.2.1 255.255.255.0

#

 ip route-static 1.1.1.0 255.255.255.0 2.2.2.2

Configuration Guidelines

None.