Different Addresses Same Switch

Answered Question
Jan 31st, 2007

We are redoing a portion of our building.

We use a 192.168.100.x range for the building.

We have an outside connection for a client system that we use, it uses 10.0.24.x. When that connection comes in, we plug it into a different Cisco switch than the ones on the 192 range. The consultant asked why don't I just plug them all into the same switch??

Can I do that?? Forgive my ignorance, but I figured everything needed to be on the same subnet on the same switch.

Thanks.

I have this problem too.
0 votes
Correct Answer by DELL ACORD about 9 years 8 months ago

You can configure on the switch ports 1-12 for vlan x and ports 13-24 for vlan y. Of course if you have a 24 port switch that supports VLANing. Without a layer 3 device the two vlan's/subnets will not talk to each other. Some intsances it is best practices to seperate inside from outside traffic on seperate switches. Hope this helps.

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gopi.tadikonda@... Wed, 01/31/2007 - 05:59

Your question was not so clear for me. What ever i understood from ur question pl. find the solution below:

You can create 2 vlans and plug them into the respective Vlan ports. But you switch should support for that and you should have one more layer 3 equipment for routing.

townofnewmarket Wed, 01/31/2007 - 12:40

OK, here's the important part I guess, lol!

I have 2 PCs. Each PC has 2 NICs.

The first NIC attaches to the 192 net.

The 2nd NIC attaches to the 10 net.

There is no static route between them, basically they are treated as 2 very separate networks that never communicate with each other.

The consultant was saying I could save a switch by just plugging the line that comes from the 10 router right into my 192 switch and the 2 networks would coexist peacefully on my switch.

So I am just wondering if that is correct or not! I hope this is clearer. I know with a repeater this would be fine, not so sure with a switch.

Correct Answer
DELL ACORD Wed, 01/31/2007 - 12:58

You can configure on the switch ports 1-12 for vlan x and ports 13-24 for vlan y. Of course if you have a 24 port switch that supports VLANing. Without a layer 3 device the two vlan's/subnets will not talk to each other. Some intsances it is best practices to seperate inside from outside traffic on seperate switches. Hope this helps.

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