Mikrotik RouterBOARD 750 GL review - throughput and latency examined

Written by Gionatan Danti on . Posted in Hardware analysis

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Latency inspection

While important, throughput is not the only thing to care: latency can be equally and even more crucial. Think, for example, to a branch office using its Internet line to carry VoIP traffic: high latency can lead to metallic voice and other sound artifacts.

So, how do our today hero perform in latency test? Lets see:

RB750GL ping benchmark

A 64 bytes-sized ping flood (100,000 packets sent / received) show us 0.1 ms increased latency when facing with normal, string and regexp matching rules. When inside a VPN, latency increase in a more pronounced manner: the RouterBOARD 750 GL add about 1.1 – 1.2 msec. However, this is not a bad results: a one millisecond latency increase can be easily tolerated.

When flooding, the ping program can be used to somehow intersect throughput and latency performances: while flooding ping are sent / received at a very fast ratio so, by using large packets, we can touch not only latency but throughput also. Let see as the total ping time varies with different packet sizes:

RB750GL ping benchmark

Notice how total ping times raise by a factor of ~ 1,75X when using small packets, over 2X when using big (1400 bytes-sized) packets and as high as 3,3X when issuing fragmented packets (2800 bytes-sized ping, resulting in three fragments) and doing string matching. Nevertheless, ping performance remain very respectable, at least until we are inside a VPN: in this case the time needed to sent / receive our 100,000 packets is very high. Note than VPN performance is probably hampered by header preprocessing (encap / decap) other then encrypt / decrypt load, as large packet performance is very strong, while small and fragmented packets flow way slower.

Comments   

 
#1 Pablo Lluviera 2013-06-26 14:46
Thanks for your job.
Very good article.
 
 
#2 baggar11 2013-10-23 18:37
Great review!

Since you wrote this review in 2011, I was wondering if you might have a chance to review the new rb951g-2hnd model?
 
 
#3 Gionatan Danti 2013-10-25 10:00
Hi Baggar11,
if I will be able to get it, I will definitely review it!

Regards.
 

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