GNS3 icon

How switch into VLAN? This experiment is very simple, that is by VLANdivision, so that different VLANunable to communicate, but the same VLANis not affected.

Lab topology

Topology

A switch connected in three VPCdivided VLANaddress planned as follows:

name	interface	VLAN	address
PC1	f1 / 0	vlan 10	192.168.10.10/24
PC2	f1 / 1	vlan 20	192.168.10.20/24
PC3	f1 / 2	vlan 20	192.168.10.30/24

Configuration

Creating vlan

1.vlan database configuration mode. (Not recommended)

SW#vlan database 
SW(vlan)#vlan 10 name caiwu
SW(vlan)#exit

2. Global Configuration Mode.

SW(config)#vlan 20
SW(config-vlan)#name renshi 
SW(config-vlan)#end

Port to vlan

SW(config)#interface fastEthernet 1/0
SW(config-if)#switchport mode access 
SW(config-if)#switchport access vlan 10
SW(config-if)#exit

Configuration process

Before configuring interoperability testing

PC1> ip 192.168.10.10
Checking for duplicate address...
PC1 : 192.168.10.10 255.255.255.0

PC1> ping 192.168.10.20 
84 bytes from 192.168.10.20 icmp_seq=1 ttl=64 time=0.989 ms
84 bytes from 192.168.10.20 icmp_seq=2 ttl=64 time=0.998 ms
84 bytes from 192.168.10.20 icmp_seq=3 ttl=64 time=0.960 ms
84 bytes from 192.168.10.20 icmp_seq=4 ttl=64 time=0.971 ms
84 bytes from 192.168.10.20 icmp_seq=5 ttl=64 time=0.999 ms


PC1> ping 192.168.10.30
84 bytes from 192.168.10.30 icmp_seq=1 ttl=64 time=1.036 ms
84 bytes from 192.168.10.30 icmp_seq=2 ttl=64 time=0.997 ms
84 bytes from 192.168.10.30 icmp_seq=3 ttl=64 time=0.963 ms
84 bytes from 192.168.10.30 icmp_seq=4 ttl=64 time=0.849 ms
84 bytes from 192.168.10.30 icmp_seq=5 ttl=64 time=0.868 ms

PC2> ip 192.168.10.20
Checking for duplicate address...
PC1 : 192.168.10.20 255.255.255.0

PC2> ping 192.168.10.10
84 bytes from 192.168.10.10 icmp_seq=1 ttl=64 time=0.845 ms
84 bytes from 192.168.10.10 icmp_seq=2 ttl=64 time=0.995 ms
84 bytes from 192.168.10.10 icmp_seq=3 ttl=64 time=0.861 ms
84 bytes from 192.168.10.10 icmp_seq=4 ttl=64 time=0.877 ms
84 bytes from 192.168.10.10 icmp_seq=5 ttl=64 time=0.859 ms

PC2> ping 192.168.10.30
84 bytes from 192.168.10.30 icmp_seq=1 ttl=64 time=0.995 ms
84 bytes from 192.168.10.30 icmp_seq=2 ttl=64 time=0.892 ms
84 bytes from 192.168.10.30 icmp_seq=3 ttl=64 time=0.958 ms
84 bytes from 192.168.10.30 icmp_seq=4 ttl=64 time=0.863 ms
84 bytes from 192.168.10.30 icmp_seq=5 ttl=64 time=0.865 ms

PC3> ip 192.168.10.30
Checking for duplicate address...
PC1 : 192.168.10.30 255.255.255.0

PC3> ping 192.168.10.10
84 bytes from 192.168.10.10 icmp_seq=1 ttl=64 time=0.877 ms
84 bytes from 192.168.10.10 icmp_seq=2 ttl=64 time=0.965 ms
84 bytes from 192.168.10.10 icmp_seq=3 ttl=64 time=0.844 ms
84 bytes from 192.168.10.10 icmp_seq=4 ttl=64 time=0.876 ms
84 bytes from 192.168.10.10 icmp_seq=5 ttl=64 time=0.852 ms

PC3> ping 192.168.10.20
84 bytes from 192.168.10.20 icmp_seq=1 ttl=64 time=0.863 ms
84 bytes from 192.168.10.20 icmp_seq=2 ttl=64 time=0.963 ms
84 bytes from 192.168.10.20 icmp_seq=3 ttl=64 time=0.855 ms
84 bytes from 192.168.10.20 icmp_seq=4 ttl=64 time=1.004 ms
84 bytes from 192.168.10.20 icmp_seq=5 ttl=64 time=0.000 ms

Official Configuration

SWClose routing

SW#configure terminal 
SW(config)#no ip routing 
SW(config)#end

vlan databasecreatevlan 10

SW#vlan database 
% Warning: It is recommended to configure VLAN from config mode,
  as VLAN database mode is being deprecated. Please consult user
  documentation for configuring VTP/VLAN in config mode.

SW(vlan)#vlan 10 name caiwu
VLAN 10 added:
    Name: caiwu
SW(vlan)#exit 
APPLY completed.
Exiting....

Create a global configurationvlan 20

SW#configure terminal 
SW(config)#vlan 20
SW(config-vlan)#name renshi 
SW(config-vlan)#end

ViewVLAN

SW#show vlan-switch brief 

VLAN Name                             Status    Ports
---- -------------------------------- --------- -------------------------------
1    default                          active    Fa1/0, Fa1/1, Fa1/2, Fa1/3
                                                Fa1/4, Fa1/5, Fa1/6, Fa1/7
                                                Fa1/8, Fa1/9, Fa1/10, Fa1/11
                                                Fa1/12, Fa1/13, Fa1/14, Fa1/15
10   caiwu                            active    
20   renshi                           active    
1002 fddi-default                     act/unsup 
1003 token-ring-default               act/unsup 
1004 fddinet-default                  act/unsup 
1005 trnet-default                    act/unsup

The interface f1/0is added to vlan 10and view

SW#configure terminal 
SW(config)#interface fastEthernet 1/0
SW(config-if)#switchport mode access 
SW(config-if)#switchport access vlan 10
SW(config-if)#exit 
SW(config)#do show vlan-sw b

VLAN Name                             Status    Ports
---- -------------------------------- --------- -------------------------------
1    default                          active    Fa1/1, Fa1/2, Fa1/3, Fa1/4
                                                Fa1/5, Fa1/6, Fa1/7, Fa1/8
                                                Fa1/9, Fa1/10, Fa1/11, Fa1/12
                                                Fa1/13, Fa1/14, Fa1/15
10   caiwu                            active    Fa1/0
20   renshi                           active    
1002 fddi-default                     act/unsup 
1003 token-ring-default               act/unsup 
1004 fddinet-default                  act/unsup 
1005 trnet-default                    act/unsup

The interface f1/1and f1/2added to vlan 20and view

SW(config)#interface range fastEthernet 1/1 - 2
SW(config-if-range)#switchport mode access 
SW(config-if-range)#switchport access vlan 20
SW(config-if-range)#exit 
SW(config)#do show vlan-sw b

VLAN Name                             Status    Ports
---- -------------------------------- --------- -------------------------------
1    default                          active    Fa1/3, Fa1/4, Fa1/5, Fa1/6
                                                Fa1/7, Fa1/8, Fa1/9, Fa1/10
                                                Fa1/11, Fa1/12, Fa1/13, Fa1/14
                                                Fa1/15
10   caiwu                            active    Fa1/0
20   renshi                           active    Fa1/1, Fa1/2
1002 fddi-default                     act/unsup 
1003 token-ring-default               act/unsup 
1004 fddinet-default                  act/unsup 
1005 trnet-default                    act/unsup

PING test

PC1> ping 192.168.10.20
host (192.168.10.20) not reachable

PC1> ping 192.168.10.30
host (192.168.10.30) not reachable

PC2> ping 192.168.10.10
host (192.168.10.10) not reachable

PC2> ping 192.168.10.30
84 bytes from 192.168.10.30 icmp_seq=1 ttl=64 time=0.971 ms
84 bytes from 192.168.10.30 icmp_seq=2 ttl=64 time=0.877 ms
84 bytes from 192.168.10.30 icmp_seq=3 ttl=64 time=0.844 ms
84 bytes from 192.168.10.30 icmp_seq=4 ttl=64 time=0.954 ms
84 bytes from 192.168.10.30 icmp_seq=5 ttl=64 time=0.869 ms

PC3> ping 192.168.10.10
host (192.168.10.10) not reachable

PC3> ping 192.168.10.20
84 bytes from 192.168.10.20 icmp_seq=1 ttl=64 time=0.866 ms
84 bytes from 192.168.10.20 icmp_seq=2 ttl=64 time=0.962 ms
84 bytes from 192.168.10.20 icmp_seq=3 ttl=64 time=0.855 ms
84 bytes from 192.168.10.20 icmp_seq=4 ttl=64 time=0.868 ms
84 bytes from 192.168.10.20 icmp_seq=5 ttl=64 time=0.965 ms

PC1And PC2can not communicate, PC1and PC3can not communicate, but PC2with PC3between can communicate, experiment a success.

At last

Benpian is divided on a switch in VLANthe experiment, write next about the inter-switch VLANcommunication.

VLAN Switch division