Switch Trunk port configuration

TrunkTo configure a port, follow these steps:

One Networking requirement:

1. SwitchA and SwitchB are interconnected with trunk. Mutual access is allowed between PCs with the same VLAN. Mutual access is prohibited between PCs with different VLANs;

2. PC1 and PC2 are located in different VLANs. You can set the IP address of VLAN Interface 10 of the SwitchB layer-3 Switch to 10.1.1.254/24, when the IP address of VLAN 20 is 255.1.1.254/24, mutual access between VLANs can be achieved.

2. Networking diagram:

1. Mutual access within a VLAN and inter-VLAN access prohibited

2. layer-3 Switch for mutual VLAN access

Step 3:

Enable intercommunication between VLANs in a VLAN

SwitchA configurations:

 
 

  
  
1. Create and enter) VLAN10, Add E0/1 to VLAN10
  
  
 
  
  
[SwitchA] vlan 10
  
  
 
  
  
A [SwitchA-vlan10] port Ethernet 0/1
  
  
 
  
  
2. Create and enter) VLAN20, Add E0/2 To VLAN20
  
  
 
  
  
[SwitchA] vlan 20
  
  
 
  
  
A [SwitchA-vlan20] port Ethernet 0/2
  
  
 
  
  
3. Configure port G1/1 as the Trunk port and allow VLAN10 and VLAN20 to pass through
  
  
 
  
  
[SwitchA] interface GigabitEthernet 1/1
  
  
 
  
  
[SwitchA-GigabitEthernet1/1] port link-type trunk
  
  
 
  
  
[SwitchA-GigabitEthernet1/1] port trunk permit vlan 10 20
 
 

SwitchB configurations:

 
 

  
  
1. Create and enter) VLAN10, Add E0/10 to VLAN10
  
  
[SwitchB] vlan 10
  
  
A [SwitchB-vlan10] port Ethernet 0/10
  
  
2. Create and enter) VLAN20, Add E0/20 to VLAN20
  
  
[SwitchB] vlan 20
  
  
A [SwitchB-vlan20] port Ethernet 0/20
  
  
3. Configure port G1/1 as the Trunk port and allow VLAN10 and VLAN20 to pass [SwitchB] interface GigabitEthernet 1/1
  
  
[SwitchB-GigabitEthernet1/1] port link-type trunk [SwitchB-GigabitEthernet1/1] port trunk permit vlan 10 20
  
  
Configure layer-3 switches for intercommunication between VLANs
 
 

SwitchA configurations:

 
 

  
  
1. Create and enter) VLAN10, Add E0/1 to VLAN10
  
  
[SwitchA] vlan 10
  
  
A [SwitchA-vlan10] port Ethernet 0/1
  
  
2. Create and enter) VLAN20, Add E0/2 To VLAN20
  
  
[SwitchA] vlan 20
  
  
A [SwitchA-vlan20] port Ethernet 0/2
  
  
3. Configure port G1/1 as the Trunk port and allow VLAN10 and VLAN20 to pass [SwitchA] interface GigabitEthernet 1/1
  
  
[SwitchA-GigabitEthernet1/1] port link-type trunk [SwitchA-GigabitEthernet1/1] port trunk permit vlan 10 20
 
 

SwitchB configurations:

 
 

  
  
1. Create VLAN10
  
  
 
  
  
[SwitchB] vlan 10
  
  
 
  
  
2. Set the Virtual Interface address of VLAN10
  
  
 
  
  
[SwitchB] interface vlan 10
  
  
 
  
  
[SwitchB-int-vlan10] ip address 10.1.1.254 255.255.255.0
  
  
 
  
  
3. Create VLAN20
  
  
 
  
  
[SwitchB] vlan 20
  
  
 
  
  
4. Set the Virtual Interface address of VLAN20
  
  
 
  
  
[SwitchB] interface vlan 20
  
  
 
  
  
[SwitchB-int-vlan20] ip address 255.1.1.254 255.255.255.0
  
  
 
  
  
5. Configure port G1/1 as the Trunk port and allow VLAN10 and VLAN20 to pass through
  
  
 
  
  
[SwitchA] interface GigabitEthernet 1/1
  
  
 
  
  
[SwitchA-GigabitEthernet1/1] port link-type trunk
  
  
 
  
  
[SwitchA-GigabitEthernet1/1] port trunk permit vlan 10 20
 
 

The configuration of the Trunk port in the VLAN is over. I hope you can understand it.