Router bottleneck

[Ty Stanton]

          I am having problems getting the full throughput promised by my ISP.  When connected directly to my modem (Cisco 3010) I can get up 65mbps but with the router (RVS4000) connected, I am limited to 20mbps.  THe ISP suggests that the issue is with the router.  I appreciate your help.  Thanks..        

[bmbrady77]

When you connect through the router, are you connecting with just one computer directly to one of the LAN ports? If not, try that.

Another thing to try, I know that sometimes an ISP's have a hangup with switching the MAC address of the directly attached node. What I mean is, your PC connected to the modem may work but when you switch to the router, it changes the MAC address that is associated with the IP address given by your ISP. This can sometimes throw them for a loop so you usually have to power both off, the power on the modem, then the router and wait a minute for everything to sync back up.

Also, check your WAN settings. Plug in your computer to the modem directly and note the IP address, gateway, and DNS that your ISP assigns you. Go into the router and statically assign those parameters to the WAN interface, and see if that changes anything.

Try those things and report you findings back.

[bmbrady77]

One last thought (sorry for the double post but the forum wouldn't allow me to edit my first one)..

Most Cisco routers have a bandwidth throttling feature. You can usually set the max upload and download speeds, as well as set maximums for specific services, or even limit by IP address in some cases. Make sure that those features are either turned off or set to a higher speed than your ISP can a fully provide to prevent throttling.

[Ty Stanton]

Mitch, thank you for your responses.  I connected directly to the modem and gathered the information from ipconfig but when I entered it into the router, I  couldn't get internet access.  Obviously, I did somehting wrong.  I also added information for upload and download speeds in the QoS section of the router but none of this improved my speed.  I didn't understand what you suggested I do about the MAC address solultion , so I didn't try.

The computer that I am on now is connected to a LAN port of the router by way of a switch.  I also tested with a laptop connected directly to the router and got the same slow speed results.

[bmbrady77]

After you connected the router back to the modem, did you cycle the power? This is what I was referring to with the MAC address hangup. If you change devices connected to the modem, ie.. going from the laptop connected directly to the router connected directly, the modem sees the different MAC address and will not allow access. You usually have to cycle power on the modem and the router off, then power up the modem, then router..in that order, to make it work. Try this method using the ip info you got from the laptop assigned statically in the routers WAN (Internet) settings.

[Ty Stanton]

I did the powere cycle and that did n't work either.  Disabling IPS worked.  thank you for your help.  Much appreciated.

[Michael Vandergrift]

Ty,

Do you have IPS enabled on your RVS4000?  If enabled, IPS can cause internet speed degradation when traffic passes throught the router.  Try disabling IPS on the router and see if the speed improves.

[Ty Stanton]

Michael, it looks like that did the trick  Thank you for your help.