Two subnets with 1 router and switch?

[jasonfaas]

I may very well be overlooking something as I am still very new to this but one of my practices for an exam coming up is having to be able to use 1 router(4221 it says), 1 switch (2960), and 2 pcs, and I have to create two subnets.  It says in the table that I have to use G0/0/0 AND g0/0/1 on the router, but if there is only one switch, how does that work?

[balaji.bandi]

In most cases 1 Interface towards the internet, 1 connected to Lan. with that assumption below example help you :

Router on a stick is the config :

https://networklessons.com/cisco/ccna-routing-switching-icnd1-100-105/how-to-configure-router-on-a-stick

[paul driver]

Hello

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@jasonfaas wrote:

I may very well be overlooking something as I am still very new to this but one of my practices for an exam coming up is having create two subnets.  It says in the table that I have to use G0/0/0 AND g0/0/1 on the router,

 how does that work?

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You would use say gig0/0 for the WAN ( internet) connection and Gig0/1 for the two subnets, so making the router itself perform the inter-vlan routing (between the subnets) , I would also say you require Network Translation but as the question doesnt mention providing internet connectivity for the subnets we can leave this out.

Example router on a stick with two subnets (lets call them vlan 10 & 11)  :

Router
int gig0/0
description WAN
ip address x.x.x.x y.y.y.y.
no shut

interface gig0/1
description LAN
no shut

interface gig0/1.10
description Vlan10
encapsulation dot1q 10
ip address 192.168.10.1 255.255.255.0

interface gig0/1.11
description Vlan11
encapsulation dot1q 11
ip address 192.168.11.1 255.255.255.0

ip dhcp pool LAN
network 192.168.10.0/24
default-router 192.168.10.1
network 192.168.11.0/24 secondary
override default-router 192.168.11.1
lease 0 8


Switch
vlan 10,11
exit

interface gig0/1
description trunk to router
switchport trunk encapsulation dot1q
switchport mode trunk
no shut

interface gig0/2
description host in vlan 10
switchport host
switchport access vlan 10
no shut

interface gig0/3
description host in vlan 11
switchport host
switchport access vlan 11
no shut

[Jon Marshall]

If that is all the question asks then there is no mention of the internet so no need for routing on a stick. 

Just create two vlans on the switch with a subnet each and then put g0/0/0 and one of the PCs in the first vlan and gi0/0/1 and the second PC in the other vlan.

Jon

[Georg Pauwen]

Hello,

this sounds like a Packet Tracer project. I think what they want you to do is create two Vlans on the switch. The entire thing would look like the project in the attachment.

[paul driver]

Hello

Creating two vlans on a 2960 -well yes but with limited L3 functionality as its really just access-layer switch.

[jasonfaas · Accepted solution]

Thank you for the replies.  After a second look, I checked out the topology at the top of the project and it showed the router being directly connected to one of the PC's on one subnet (G0/0/1) and a switch and PC on the other subnet (G0/0/0) so it finally made sense.  I eventually did it all and everything worked, except I got to the point where I could ping everything EXCEPT the VLAN 1 interface on the switch and only with IPv6.  I could ping it with IPv4.  I made sure I had IPv6 unicast-routing enabled on the router and had "sdm prefer dual-ipv4-and-ipv6 default" and reloaded the switch and still couldnt get it.  The odd thing was I could ping right through it to the PC attached to the switch.  Any ideas?  I eventually went and made static routes on the switch and router and I think it worked, however I didnt think at the time that this was necessary since it would ping through the switch to the PC.