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Configure Port-Based VLANs

Network Requirements

  • Server1 and PC1 are in the office network, while Server2 and PC2 are in the production network.
  • You need to configure the port-based VLAN functions to isolate PC1 and PC2 so that PC1 can access only Server1 and PC2 can access only Server2.

Network Topology

Networking for Configuring Port-Based VLANs

Figure 3-2 Networking for Configuring Port-Based VLANs

Configuration Steps

Step 1: On Device1, configure VLANs, and configure the port link types of the ports.

#On Device1, create VLAN2 and VLAN3.

Device1#configure terminal
Device1(config)#vlan 2-3

#On Device1, configure the link type of ports gigabitethernet0/1 and gigabitethernet0/2 to Access. Configure gigabitethernet0/1 to allow services of VLAN2 to pass and configure gigabitethernet0/2 to allow services of VLAN3 to pass.

Device1(config)#interface gigabitethernet 0/1
Device1(config-if-gigabitethernet0/1)#switchport mode access
Device1(config-if-gigabitethernet0/1)#switchport access vlan 2
Device1(config-if-gigabitethernet0/1)#exit
Device1(config)#interface gigabitethernet0/2
Device1(config-if-gigabitethernet0/2)#switchport mode access
Device1(config-if-gigabitethernet0/2)#switchport access vlan 3
Device1(config-if-gigabitethernet0/2)#exit

#On Device1, configure the link type of port gigabitethernet0/3 to Trunk and allow services of VLAN2 and VLAN3 to pass.

Device1(config)#interface gigabitethernet 0/3
Device1(config-if-gigabitethernet0/3)#switchport mode trunk  
Device1(config-if-gigabitethernet0/3)#switchport trunk allowed vlan add 2-3
Device1(config-if-gigabitethernet0/3)#exit

Step 2: On Device3, configure VLANs, and configure the port link types of the ports.

#On Device2, create VLAN2 and VLAN3.

Device2#configure terminal
Device2(config)#vlan 2-3

#On Device2, configure the link type of ports gigabitethernet0/1 and gigabitethernet0/2 to Access. Configure gigabitethernet0/1 to allow services of VLAN2 to pass and configure gigabitethernet0/2 to allow services of VLAN3 to pass.

Device2(config)#interface gigabitethernet 0/1
Device2(config-if-gigabitethernet0/1)#switchport mode access
Device2(config-if-gigabitethernet0/1)#switchport access vlan 2
Device2(config-if-gigabitethernet0/1)#exit
Device2(config)#interface gigabitethernet0/2
Device2(config-if-gigabitethernet0/2)#switchport mode access
Device2(config-if-gigabitethernet0/2)#switchport access vlan 3
Device2(config-if-gigabitethernet0/2)#exit

#On Device2, configure the link type of port gigabitethernet0/3 to Trunk and allow services of VLAN2 and VLAN3 to pass.

Device2(config)#interface gigabitethernet 0/3
Device2(config-if-gigabitethernet0/3)#switchport mode trunk  
Device2(config-if-gigabitethernet0/3)#switchport trunk allowed vlan add 2-3
Device2(config-if-gigabitethernet0/3)#exit

Step 3: Check the result.

#Query the VLAN information on Device1.

Device1#show vlan 2 
---    ----  -----------------------------   -------   -------     -----------
NO.    VID    VLAN-Name                        Owner   Mode        Interface 
---    ----  -----------------------------   -------   -------     -----------   
1      2      VLAN0002                        static  Tagged        gi0/3 
                                                      Untagged      gi0/1
Device1#show vlan 3 
---    ----  -----------------------------   -------   -------     -----------
NO.    VID    VLAN-Name                        Owner   Mode        Interface           
---    ----  -----------------------------   -------   -------     ----------- 
1       3     VLAN0003                         static  Tagged        gi0/3   
                                                       Untagged      gi0/2 

#Query the VLAN information on Device2.

Device1#show vlan 2 
---    ----  -----------------------------   -------   -------     -----------
NO.    VID    VLAN-Name                        Owner   Mode        Interface 
---    ----  -----------------------------   -------   -------     -----------   
1      2      VLAN0002                        static  Tagged        gi0/3 
                                                      Untagged      gi0/1
Device1#show vlan 3 
---    ----  -----------------------------   -------   -------     -----------
NO.    VID    VLAN-Name                        Owner   Mode        Interface           
---    ----  -----------------------------   -------   -------     ----------- 
1       3     VLAN0003                         static  Tagged        gi0/3   
                                                       Untagged      gi0/2 

#PC1 and PC2 cannot communicate with each other, PC1 can access only Server1, and PC2 can access only Server2.