How to assign multiple VLANS to a port?

Question

I have a simple question about a network (I am new to this concept so please correct me if I am wrong).

I have a simple network as shown (GNS3):

The network have 3VLANS (VLAN10 = DesignTeam, VLAN30 = EngTeam and VLAN20=Storage). What I would like is for Vlan30 to be accessed by VLAN10 & VLAN30.

I have done some research and I do few things here i.e use router on a stick method but I want to do this via multi-layer switch.

This is what I have done: First created Vlans Second assigned port to my VLAN's: VLAN10 = f1/3 VLAN30 = f1/0 VLAN20 = f1/4 Third Assign ports to VLAN's: MainSwitch#conf t MainSwitch(config)#interface fastEthernet 1/4 MainSwitch(config-if)#switchport access vlan 10 MainSwitch(config-if)#switchport access vlan 30 and then if I run show vlan-switch

I get different output each time (some port gets assigned to wrong VLAN's)

Am I doing anything wrong, anything I shod read further?

EDIT: if I do: show ip int br i get:

Vlan10                     192.168.10.1    YES manual up                    up      
Vlan20                     192.168.20.1    YES manual up                    up      
Vlan30                     192.168.30.1    YES manual up                    up 

I did show lan-switch and I get:

1    default                          active    Fa1/1, Fa1/2, Fa1/5, Fa1/6
                                            Fa1/7, Fa1/8, Fa1/9, Fa1/10

10   DesignTeam                       active    Fa1/3
20   Storage                          active    Fa1/4
30   EngTeam                          active    Fa1/0

If I access fa1/3 and do switch port access vlan10 then I get:

 1    default                          active    Fa1/1, Fa1/2, Fa1/5, Fa1/6
                                        Fa1/7, Fa1/8, Fa1/9, Fa1/10

10   DesignTeam                       active    Fa1/3 Fa1/4
20   Storage                          active    
30   EngTeam                          active    Fa1/0

As you can see the storage port moved to VLAN10 This is what I want (VLAN 10 & 30 have access to 20):

 1    default                          active    Fa1/1, Fa1/2, Fa1/5, Fa1/6
                                        Fa1/7, Fa1/8, Fa1/9, Fa1/10

10   DesignTeam                       active    Fa1/3 Fa1/4
20   Storage                          active    Fa1/4
30   EngTeam                          active    Fa1/0 Fa1/4

Am I still doing anything wrong?

Answer 1

I think you're assigning ports the wrong way. You have to specify each port before you enter the vlan command. Something like this:

MainSwitch(config)#interface fastEthernet 1/4
MainSwitch(config-if)#switchport access vlan 20
MainSwitch(config)#interface fastEthernet 1/3
MainSwitch(config-if)#switchport access vlan 10
MainSwitch(config)#interface fastEthernet 1/0
MainSwitch(config-if)#switchport access vlan 30

Then you need to assign an IP address to each VLAN interface:

MainSwitch(config)#interface vlan 10
MainSwitch(config-if)#ip address 1.2.3.4 255.255.255.0

Etc.

Answer 2

It's feasible to assign multiple VLANs to one port on switch

This can be done by Configuring trunk port allowing all Vlans

Switch(config)#int f0/1

Switch(config)#switchport mode trunk

Switch(config)#switchport trunk allowed Vlan all

Switch (config)#no shutdown

Or els we can assign specific multiple Vlan on single port .

Switch(config)#int f0/1

Switch(config)#Switchport mode trunk

`Switch(config)#switchport trunk allowed vlan 10,20,30

Switch(config)#no shutdown