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multiple vlans and one subnet routing, possible!?

mbroadstreet
Level 1
Level 1

Hi!

We have following problem:

We have one subnet reserved for this one lan, where the equipment is - 2x Catalyst 2950 switch and 1x 1721 router with two shdsl wic´s.

The switches are connected to each other by trunk-ports and the router is connected to the other switch also by trunk. All other switch ports are access ports for workstations etc.

Now what we would need to do is to separate all the access-ports from each other by vlans and route them through the router to the internet.

As I mentioned we have only one subnet to share with all the access-ports and that is also distributed via dhcp, the question is how do we do this or is it even possible to do with vlans?

This all works fine without vlan´s but we really would need a way to separate all the ports as individuals so they cannot see each others.

Does this even make sense? :)

br

Markus

2 Replies 2

Richard Burts
Hall of Fame
Hall of Fame

Markus

Each separate VLAN on the switch corresponds to a separate subnet on the router. So what you are asking about providing separation between users does make sense and possibly could be done if you had a subnet per user. But if you have only a single subnet to work with then I believe that you can not do what you are asking.

HTH

Rick

HTH

Rick

dbellaze
Level 4
Level 4

The best way to segment your network would be with VLANs, and interVLAN routing. You would need to create a trunk to your router from the switch and create sub interfaces etc.

This link has some sample configurations.

http://www.cisco.com/en/US/tech/tk389/tk390/technologies_configuration_example09186a00800949fd.shtml#configs

Daniel