We have started using a lot of Mikrotik's for customer (mainly 2011's for 
customers these days, and seeing something that seems a bit odd.

We NAT the customers obviously.  We hook our radio to Ether1 on the router and 
then bridge ports 2-5.  We have tried both SRC-NAT and Masquerade with the same 
results.  Here is what we see.

We have three test "servers" that we use for bandwidth tests.  The first is an 
Ookla test on a test server inside our network .  The second is a TIK located 
inside our network.  The third is speedtest.net.

There is very little variance in all three of these, so you will quote a 
combined average for discussion purposes.

When we test from the TIK itself to our test TIK, we get about 100% of what we 
should be getting based on the customer BW restrictions at the core.  In this 
example, let's say 8 Mbit.  When we test from the NAT'd side of the Tik, the 
most we see on ONE connection is about 4.5Mbit to 5Mbit, using the ookgla and 
speedtest.net.  If I run TWO devices from the NAT'd side at the same time, I 
get about 90% to 95% of the 8 Mbit.  I can bypass the customer's TIK, 
statically put the public IP in a laptop and get the full 8 Mbit.

I have seen this at several of the customer installs we do and it leaves me 
scratching my head (after several hours of fiddling with the TIK hoping for a 
different result).

What could it be?

Paul




Paul McCall, Pres.
PDMNet / Florida Broadband
658 Old Dixie Highway
Vero Beach, FL 32962
772-564-6800 office
772-473-0352 cell
www.pdmnet.com<http://www.pdmnet.com/>
[email protected]<mailto:[email protected]>

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