Server Fault is a question and answer site for system and network administrators. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

We have a building with 10 individual offices.

We have a single internet connection coming in where our ISP has provided us with 10 public ip addresses.

Each office would like to have their own Linksys firewall router to manage their inbound/outbound port traffic.

Can I just put a basic switch in between the ISP service modem and the 10 individual linksys routers?

share|improve this question
up vote 6 down vote accepted

Yes, you can do this. You'll just want to make sure that you keep track of which router has which IP address, and of course you'll want to configure them statically to avoid your ISP providing a particular business with an IP different than what they were using.

share|improve this answer
A managed switch with ARP spoof prevention or similar would allow you to lock down switch ports to a particular MAC and/or IP address. – gravyface Apr 23 '12 at 17:54

We do exactly this. We have an 8 port Siemens switch connected to the output of our ISP's Cisco router. Each port of the switch goes to a router in a different division of the company. I labeled each router with IP info so ,that in the case of a router failure, a new router could be dropped in with minimal trouble.

share|improve this answer
what model number is your switch? any problems using an unmanaged switch here? – Jonathan S. Fisher Sep 19 '13 at 20:39
The switch is just a basic 8-port 10/100 switch. It's been running for about 3 years now with no problems at all. Didn't see the need to add complexity with a managed switch. – user76732 Mar 6 '14 at 15:00

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.