Help with QOS by Port on SG200

Eric Bueschel · ‎05-15-2015

I have a SG200 plugged into my T1 Router (I have a /29 subnet). On Port 3, I have a Linksys Router (Router A) serving my business network (webserver, fileserver, some other application servers). On Port 4 I have another Linksys router (Router B) with my home network.

The IP configured as the gateway on Router A is the IP registered to my business domain. My business servers are natted behind Router A using the 192.168.0.0 network and I use Tomato as the Router Firmware and Port Forwarding to route all the various traffic to my business systems. Router B is configured with a static IP as well, and using the 192.168.1.0 network, but the devices behind it are all consumer devices or PC's...........roku, etc.

My end goal is ALL traffic on Port 3 have priority over traffic on Port 4. In other words, if I'm streaming a show on my Roku, and a customer accesses a server........I don't want his experience limited........I want the business app to take priority over the Roku.

I am not switch savy enough to know where to start on this. Is there a simple way to simply make one port have priority over another? For both inbound and outbound traffic?

Thanks

Eric

Michael Vandergrift · ‎05-18-2015

Hi Eric,

There is not really a way to accomplish this configuration on the SG200. The best you could do is limit bandwidth on a per-port basis. There is not a way to prioritize traffic based on port or even IP address. If you could get your two routers to apply different DSCP values to their outbound traffic you could prioritize that way but you still couldn't control inbound. You would need at least an SG300 to be able to create ACLs to do your traffic selection and then configure the proper policies.

Regards,

Mike.V

Eric Bueschel · ‎05-18-2015

Mike,

Thanks for the response. So.....limiting bandwidth by port. If I configure it to limit port 4 to 20% of my bandwidth........if Port 3 has no traffic, would port 4 then be able to use all the available bandwidth, and just be limited to 20% during a high load on Port 3?

Eric