Creating VLANS but not route

[mikolajkoziel94]

Hi everyone! I have a trouble with configuring a network in my company. So at this moment i have Cisco 3800 series router, this router has configured a dhcp server, with pool range 192.168.99.31 - 192.168.99.254. The default gateway is: 192.168.99.1 Router is connected to a Cisco 3560 Catalyst Switch. So I have connected more or less 15 computers. Everything works pretty and fine. But I would like to  create VLANS to divide my company in to a separate logical areas. For example i have first vlan called ,,shop'', second called ,,restaurant'' and last one called ,,wifi''. When I divide my network for vlans there is no access to the internet, because the f0/48 port on my switch witch is connected to the router is assigned to the vlan shop. So only that vlan has access to the Internet and another nodes in another vlan can only talk on LAN. I know that my 3560 Catalyst Switch is a Layer 3 device and I wish to know how to create inside routing in my switch to get acces from the Internet by all Vlans. I don't know how to set a default gateway to all VLANS. I'm so new in world of cisco because i prepare to CCNA exam. So please understand my trouble and I will be wery happy for your feedback!

In attachment I add a Cisco Packet Tracer file to show you the topology. Sorry for my language!

All the best!

[Krash Mole · Accepted solution]

Hi,

if you want to create multiple Vlans, you need to understand that they will be different range of IP addresses, your DHCP server will need to assign different information depending on the subnet.

and you will need to configure a default route to the next hop so that you can have internet access. if it is what you looking for i can help you with an example.

Sorry I couldn't open your packet tracer file, it says it is a different version, i am using 6.0.2.00052 which one are you using?

[mikolajkoziel94]

Hi,

Thanks for your feedback! This is exactly what I am looking for. I am using 7.0.0.0202. It would be great if you will give me more specific information how to reconfigure my DHCP server to figure it out :)

[Krash Mole · Accepted solution]

Hi, 

please see attached your edited packet tracer file.

[mikolajkoziel94]

Hi,

Thanks for your work it's look perfect and I'm glad to learn something new. But I've a few more questions:

In this confguration is not necessary to configure ip nat inside and outside ?

Why the g0/0.4 sub interface ( for VLAN WI-FI) is assigned to g0/0 instead of g0/1 like other subinterfaces ?

Is it necessary to assigned an IP address to VLANS or is only for management purposes ?

Thanks!

[Krash Mole]

Hi,

you are right vlan wifi should be on g 0/1.4, it is a mistake from my side, I didn't check it.

yes it is not necessary to configure Ip nat inside and outside. it is not also necessary to assign ip address to vlan, while you set up trunks everything should be working fine. only set up ip address for vlan management otherwise there would be too many routes, imagine that you have 50 switches?

[mikolajkoziel94]

Hi,

Ok I understand, now all looks clearly. Thank you for solving my problem!