3com 3031 Instruccion De Instalación

C

HAPTER

 20: VLAN C

ONFIGURATION

The following is a configuration example of layer 3 relay mode (subinterface). As 
shown in the following figure, the VLAN attributes of ports are specified on Switch 
1 and Switch 2, thus the workstations A, B, C and D connected to these Switches 
belong to VLAN 10 or VLAN 20. The following is required:

■

The addresses of Ethernet subinterfaces 3/0/0.1, Ethernet3/0/0.2, 
Ethernet4/0/0.1, and Ethernet4/0/0.2 are 1.0.0.1, 2.0.0.1, 3.0.0.1, and 4.0.0.1.

■

Communication is feasible between workstation A and B as well as between C 
and D, i.e. through the same Switch, workstations in different VLANs can 
communicate with each other.

■

Communication is feasible between workstation A and C, as well as between B 
and D, i.e. through different Switches, workstations in the same VLAN can 
communicate with each other.

■

Communications can be carried out between workstations A and D, and 
between B and C, i.e. different switches and different VLANs can communicate 
with each other.

Figure 44   VLAN networking diagram of L3 switching mode

Configure the router:

Create Ethernet subinterfaces (Ethernet 3/0/0.1, Ethernet 3/0/0.2, Ethernet 
4/0/0.1, and Ethernet 4/0/0.2 as shown in the figure) and enter their views to 
configure their IP addresses. Set the encapsulation type of each subinterface (The 
encapsulation type of the Ethernet subinterface must keep consistent with that 
configured on the switch port) and the associated VLAN ID.

Note: After configuring the encapsulation type of the Ethernet subinterface, the 
subinterface is set as permitted trunk.

  port1

non-trunk

port

  port3

trunk port

eth3/0/0.2

2.0.0.1/8
VLAN 20

port2
non-trunk

port

  port4

A

VLAN10

B

VLAN 20

2.2.2.2/8

1.1.1.1/8

4.4.4.4/8

VLAN 20

D

C

VLAN10

3.3.3.3/8

eth3/0/0.1
1.0.0.1/8
VLAN 10

trunk port

eth 4/0/0.1

3.0.0.1/8

VLAN 10

eth 4/0/0.2

4.0.0.1/8

VLAN 20

Internet

LAN Sw itch

LAN Sw itch

Router