Our site just switched over to 1 Gbs/200 Mbs fiber last week. We have noticed that we can’t get our full speeds through the RB21100AHx2. I tested by connecting a laptop configured with one of our static public IPs directly to the fiber gateway and doing speedtests. On avg, I got 919 down and 190 up, so the ISP is delivering the speeds. The second test was plugging the same laptop into a LAN port on the MT (ports 2-5 are in a switch group with 2 being the master port). The speeds are still high, but went down to 868/187. The real reduction shows when testing from another desktop on the network (connected to the router through a daisychained MT switch. From my desktop, the speeds go down to 546 down/182 up. So, there is definitely something going on in my network that is reducing bandwidth. Is there a tool I can use to see where the bottleneck lies, or what could be possibly blocking traffic? Most bandwidth posts on the internet are about SLOWING bandwidth, but I am looking to MAXIMIZE it. I can post my config if needed to help.
Hi rvr9999,
the first thing I would do, is to look at the cpu usage of the RB21100AHx2 and the cpu usage of the switch. Is any of the devices maxed out?
Second I would try to eliminate the switch as cause; Therefore …
… connect your laptop to the switch and make a speedtest. What is the speed you get?
… directly connect your PC to the router and check your bandwidth. What is the speed you get?
(if possible disconnect all other devices from the switch)
Is there a tool I can use to see where the bottleneck lies
If you really want to go down to the detail there is wireshark. But before that I highly recommend to narrow down the error.
Best regards, Lui
I’m not overloaded. On the RB21100AHx2, my CPU usage fluxes between 1-5%, with 1483/1518 free memory. One switch has 14-20% CPU usage with 105/128 Mb free memory, and the other has 6-15% CPU usage with same memory free. Both switches are connected individually on the RB21100AHx2 in a switch group. So, I don’t think overloading is the issue. I will speedtest with a laptop directly into each switch tomorrow and report the results. Thanks.
Sorry it has taken so long for me to revisit this. I did perform the bandwidth test from each switch, and here are the results:
Test parameters:
used att.com/speedtest for all tests
Brand new laptop w/ core i7 CPU and 8gb ram
Commercial ethernet cable, CAT5e
Three tests on each device, all numbers are Mbps.
Switch 1: 471 down x 186 up, 520 down x 186 up, 426 down x 180 up
Switch 2: 571 down x 185 up, 517 down x 184 up, 358 down x 187 up
RB21100AHx2:798 down x 185 up, 765 down x 188 up, 834 down x 187 up
As I said before, neither switch is overloaded. Any other ideas?