Can I configure the Internet access through Cisco 3560?

[happierlarry]

Hi all,

 

Hopefully a quick question. I’ve got a network I would like to split into several VLANs, I access the Internet via a Smoothwall box. I’ve got cisco 3560 switch and several VLANs configured on the switch, including gateways. VLANs are talking to my DHCP server fine. But the question is: can I connect my Smoothwall to my 3560 and access the Internet from my VLANs? I tried few different options for port that Smoothwall connects to (I’ve set it as Layer 3 – no switchport, I’ve set it as one of VLANs) but it doesn’t work. I can ping Smootwall box from VLANs (so 3560is routing the traffic to it ) and I can ping Google from 3560 switch but no Internet accee from VLANs. Is there a way of setting it up or 3560 does not support that?

 

Thanks.

[FN-GM]

You can.

 

You need to do 2 things.

 

On the Cisco switch you use the following command. Replace 10.115.1.1 with the IP of your Smoothwall.

 

conf t

ip route 0.0.0.0 0.0.0.0 10.115.1.1

 

On the Smoothwall you need to set a route back. I can't remember the exact location. On that setting you enter the mask that covers your VLANS. The gateway is the IP address of the VLAN configured on the Cisco 3560 that your Smoothwall sits in.

[happierlarry]

That's great, configuring it now. But on my 3560 how should I configure the port that Smoothwall connects to - "no switchport"? Thanks

[FN-GM]

You can do that or you can simply put it in a VLAN. I would do the latter as it's much more flexible.

[happierlarry]

Yes, it is set as part of VLAN. On Smoothwall - go to Network - Routing - Subnets, I set all my VLANs with gateways but no success. :-(

I might give Smoothwall a ring.

[FN-GM]

Can you post screenshots of the smoothwall config as well as the Cisco config please?

 

Smoothwall might not be able to help if it is something not right on the Cisco.

[happierlarry]

Just called Smoothwall support and they were brilliant and sorted it out! Also thank you FN-GM for your help!

[FN-GM]

Great news!

 

And you're welcome!