Signal levels don't matter when the air rate tests are doing very well...and
as expected. But just for kicks, -58/-59 and -63/-64.
eth0_real Link encap:Ethernet HWaddr 00:15:6D:F1:C9:BA
UP BROADCAST RUNNING PROMISC MULTICAST MTU:1500 Metric:1
RX packets:5469815 errors:0 dropped:0 overruns:0 frame:0
TX packets:7545829 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:500
RX bytes:663728422 (632.9 MiB) TX bytes:1633552247 (1.5 GiB)
The others show the same thing. One other thing I noticed. If I use the
MikroTik ping tool, set the timeout to 100ms (makes the ping go about 10x
faster than normal), it will drop packets like crazy. When I say like
crazy, I mean 4-8% from ethernet port on MikroTik to UBNT. I can reproduce
this on 4 different rockets, with 3 different MT board types (1x493AH,
1x750G, 1x493). If I set the negotiation speed to 10M full duplex the
problem goes away with the packet loss.
Using Shielded cable, shielded ends, with surge suppressors on both top and
bottom. I have tried different cable, and with and without surge suppressors
with the same results. Lucky for me I only need 10M on one PtP link.
The 3.65 link I happen to have a nice 24 port Dell Managed Switch. For
whatever reason, it works fine through the Managed Switch. So I tried cheap
switches (Linksys, Netgear, and DLink) at the other location, and it was a
no go. I don't want to have to buy a $200 switch to make the problem go
away...I'll just replace with MikroTik backhauls if I have to do that. I'm
hoping they figure out the problems.
Regards,
Chuck
On Tue, Sep 7, 2010 at 7:30 PM, Faisal Imtiaz <[email protected]> wrote:
> What is the Firmware you are running on the PowerBridges ?
> and what are the signal levels... on Chain 0 / Chain 1
>
> ..Also Make sure the MTU / L2MTU on the Mikrotik are 1500/1524
>
> Try to auto negotiation on the ports on both the Mikrotik & PBM5
>
> also, ssh into the PBM5 & use /bin/ifconfig command to see if there are
> any errors on the Ethernet Port and duplex mismatch ?
>
>
> Faisal Imtiaz
> Snappy Internet & Telecom
> 7266 SW 48 Street
> Miami, Fl 33155
> Tel: 305 663 5518 x 232
> Helpdesk: 305 663 5518 option 2 Email: [email protected]
>
> On 9/7/2010 6:44 PM, Steve Barnes wrote:
> > I changed out a StarOS backhaul with a pair of PowerBridge 5M radios, 4
> > mile link. I Have an odd issue. The link is perfect 130MB 99% Airmax.
> > UBNT Speed test from radio to radio is 84Mb. Now the interesting issue,
> > both radios are plugged in to MT 493AH 4.11 OS. Running MT Bandwidth
> > test from MT to MT TCP speeds are horrible. 14 Mb Dn and 6 Mb Upload.
> > We tried all kinds of tests finally realized (after the climber was on
> > the ground and in my office) that if I do a speed test from the
> > PowerBridge station to a Rocket plugged into the same Mikrotik that I
> > get 14 Mb x 6 Mb through a 100% wired connection (UBNT to Port-2 MT,
> > Port-6 to UBNT Rocket) We had tried different ports to no avail and I
> > test from MT AP thru MT 493AH to 2^nd MT AP and I got 50 Mb x 50Mb.
> > Then I realized that 2 hops across the wireless link I had a
> > NanoBridge. A test to that across the wireless side of the link gave me
> > a 30 Mb x 35Mb. So it come down to a single PowerBridge radio that
> > either has a bad ethernet port or a bad POE/cable between the UBNT and
> > MT, or some kind of incompatibility between the MT and PowerBridge. All
> > ports are set to 100Mb FDX not Auto negotiate. This MT 493AH is
> > relatively new with Gig option. When running speed test there are no
> > ethernet errors or packet errors on the MT.
> >
> > What else can I check from the ground. Unit is 250 ft up and requires a
> > climber I don’t have daily access to.
> >
> > Will the PowerBridge 5M work with 12-15 Volt. I know it wants 24VDC I
> > don’t currently have that on this tower but had no issue with others on
> > different towers at 12 V
> >
> > Steve Barnes
> >
> > RC-WiFi Wireless Internet Service
> >
> >
> >
> >
> >
> >
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