Cisco 2960 multiple vlan port?

Question

Hi,
How to create a port in multiple vlan's on Cisco 2960 switch?

Answer 1

You should explain why do you wan to do that. What do you want to connect to that port. 2 scenarios:

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1 - you want to connect to that port another switch, because you are expanding your network, you have more end users connected etc. In this case, you will connect 2 switches using crossover cable and both you will configure as a trunks, with eventually allowed vlans that you want. But you can skip this portion and in that case all vlans will be allowed, so:



switch#conf t

swtich(config)# int fa0/24

swtich(config)# description CONNECTION TO SWITCH 2

swtich(config)# switchport mode trunk

swtich(config)# switchport trunk encapsulation dot1q

swtich(config)# switchport vlans allowed 10,20,30 // it depens on switch use "?" to find yout correct commands



on the switch 2 the same thing



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2 - if you want to connect regular host to that port, it will not work and it is not recommended way

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3 - maybe you want to connect a router to that port, in that case you willbe able to configure router on the stick, and have subinterfaces. For example let's say you connected router fa0/0 to switch fa0/24 (configured as above trunk), then you can do this on the router:



router# int fa0/0.1

router# encapsulation dot1q 20

router# ip add 172.16.0.1 255.255.255.0



router# int fa0/0.1

router# encapsulation dot1q 30

router# ip add 10.0.0.1 255.0.0.0

Answer 2

IF you are trying to create a trunk:



interface f0/1 (or whichever interface in question)

switchport mode trunk



OR



If you are trying to setup a Data and Voice VLAN on the same interface:



Interface f0/1

switchport host

switchport access vlan 2 (this is your data VLAN)

switchport voice vlan 3 (this is your data VLAN)





Hope this helps.

Answer 3

You should really only be doing that on a trunk port. It would look like so

switchport trunk allowed vlan add 10,11

Answer 4

the dhcp realy command works perfectly fine on packet tracer .. must be something working with your setup ... the confing once again to see it everthing is fine.