This may not explain what you are
seeing but all ports are not created equal on this series of
router.
"to achieve max performance, choose one port from each category:
one CPU port (Ether 11), one PCIe port (Ether 13), one Switch1
port (any Ether 1-5), and one from Switch2 group (any Ether 6-10)"
http://forum.mikrotik.com/viewtopic.php?f=3&t=65714
On 12/14/2014 5:48 AM, Mike Hammett wrote:
Has anyone else seen something similar?
I had an RB1200 in this location. My upstream changed from port
2 to port 3. My downstream stayed on port 1. Downstream traffic
through the device was horrible, limited to single digit megs.
Upstream traffic through the device was fine, limited by
wireless conditions (about 60 megs). I could do simultaneous TCP
BTests, one from an upstream router to this router and one from
this router to a downstream router. Both tests ran
simultaneously would use the full capacity of the pipe available
(90 megs from the upstream and 60 megs to the downstream). The
wireless conditions were obviously adequate as simultaneous TCP
tests maximized throughput. The difference being these tests
were ran to\from the device instead of through the device. Let's
try moving the cable and IP addresses to port 2. Everything
works fine.
I was on 5.26. I upgraded to 6.19 and then 6.23, making sure to
upgrade the firmware each time. No improvement. Let's move the
cable and IPs back to port 2. Everything works fine.
Okay, I port 3 must be bad, let's swap this out with a new
RB1100AHx2 that I have so that I don't have any future port
failures. The new RB1100AHx2 does the same thing in the same
situation.
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