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New Member

Network/Subnet simple configuration help required.

Hi, I need some help and it may seem a bit silly.

I have a simple network design with 1 router, swtich and two pcs. I want to be able to test out out subnetting to see how it works.


I am going to use a network with 8 subnet bits.

Subnet 1 will use

Subnet 2 will use

I am going to use and as the GW addresses.

Do these subnets that I am going to use need to be connected by a router or can they be plugged into the same switch?

I know this might sound a bit confusing.


New Member

They canbe plugged into the

They canbe plugged into the same switch as that 8 bit mask makesit one flat network. Adjust the subnet mask to create multiple networks from the 10.x.x.x subnet.  Remember teh subnet mask tells which part is network and which is host, 8 bits mean the last 3 octets are all host.

Super Bronze

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They can be plugged into the same switch, but hosts will not be able to (by default) communicate with hosts on the other subnet w/o a router.

Cisco Employee

With the topology you are

With the topology you are using, you will also need to configure VLAN's on the switch and subinterfaces on the router so the two subnets you have created can communicate. Assign the ports on the switch that are connected to the PC's to one of the VLAN's each. Then create subinterfaces on the router that correspond to the VLAN's you created.

If you need help with the commands for this, checking out Cisco documentation will help.

- Brian

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