Hi,

Consider I have 4 VLAN's and three unmanaged switches with 48 ports. I have 15 machines in each VLAN .Can i use same switches for 4 VLAN's or 4 switches foe 4 VLAN. If i use same switches will it create any problem in network like bandwith uses ,brodcast etc.Please help me.

Again, it depends on what you want to do. You can have a vlan per switch if you want and connect each switch to the 3750 on a different vlan and then have the 3750 route between vlans.

It really can be done in a number of ways ie. the one above and the one in previous post. Bandwidth problems could come in if you have one vlan that generates a lot of traffic, if so it may be better to spread that vlan across all 4 switches but then you would need to add config to unmanaged switches - you see why it's difficult to give a definitive answer ?

Jon

Problem is what those three switches are unmanagable i can't config them i have caonfigured routing in those two 3750 switch(clustered).If i put two different vlan machines in single unmanaged switch with two cross cables will it create any prioblem???

Mahendra

If the switch is unmanaged I do not see how you could configure any VLAN information in it. Therefore each unmanaged switch could be in only a single VLAN. And if it is unmanaged I do not see how you could configure any interface as a trunk, so the switch would connect on an access port to your 3750 switch. Each unmanaged switch could be in a different VLAN if you wanted but I do not see how you could get more than 1 VLAN per each unmanaged switch.

HTH

Rick

Well mahendra,

I think you have all the Vlan on the unmanaged switch. But few thing need to be done manually like IP address.

Example

If we have 3 Vlan and their IP rang are like 192.168.1.0/24 to 172.169.3.0/24.

Here we need 3 connection between manage and unmanaged switches (one for each Vlan).There will be on trunking command in the ports of managed switch, its will simple access ports of their respective Vlan.

On the PC connected to the unmanaged switch, manually configure the IP address with respect to the vlan you want it to work on. Like if you want the PC 1 to be in vlan 1 give the IP address of range 192.168.1.2-254/24 with the default gateway of vlan 1. For the PC in vlan 2 manually configure the IP address of range 192.168.2.1-254/24 and so on.

Remember DHCP will not work properly on the unmanaged switches in the above setup. But it will work fine in one vlan per unmanaged switch.

Please do rate me if the solution works