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cmurrayis
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15km Backhaul Problems - Nstream

Mon Oct 12, 2009 1:52 am

Hi,

We setup a new backup backhaul on Saturday evening, all went well and we get a stable 5mbps/5mbps with nstream enabled.

Site details:

Site A:

Mikrotik Rb433AH
Mikrotik R52N
12db Waveguide Omni

Site B:

Mikrotik Rb411
Ubiuiti XR5
22db Panel

15.6km Clear LOS Clear Fresnel

Link Stats:

Image

When we setup the link the other night the stats were similar to the above, with nstream on we had no issues doing 5mbps/5mbps on the link. Come Sunday morning the link was in and out like a yoyo complaining about Extensive data loss.

We disabled Nstream and link was semi-stable again but only getting 2mbps/2mbps as soon as we enable nstream the link drops out with the same error, I enabled wireless debug in logging and can see nothing too much out of the norm.

Image

We know the Waveguide omni is a slow point in the link and will be upgrading it to a directional antenna this week but need to get these issues sorted first as it was stable for a few hours after install then went down hill form there.

We have tried different channels but no improvment, we have tried to try 10mhz & 5mhz channels but for some reason the xr5 cannot find these :S I have verified the R52N is infact broadcasting on the correct channels at 5mhz and 10mhz but the Rb411 & xr5 cannot see these so this is another mystery.

Anything you think we could be doing wrong that could be causing this would be greatly appreciated.

Cheers

Cameron
 
InoX
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Re: 15km Backhaul Problems - Nstream

Mon Oct 12, 2009 2:50 am

I think that 15km for an omni is a little to much...
 
cmurrayis
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Re: 15km Backhaul Problems - Nstream

Mon Oct 12, 2009 3:17 am

I thought that as well, but it was working fine to start off with. Works fine without Nstream but as soon as you turn it on the link is in and out like a yo-yo
 
valypetre
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Re: 15km Backhaul Problems - Nstream

Mon Oct 12, 2009 10:33 am

what's the noise level at the omni's end?
 
cmurrayis
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Re: 15km Backhaul Problems - Nstream

Mon Oct 12, 2009 3:50 pm

Hi,

Thanks for you reply, here is the requested:

Image

Cheers

Cameron
 
popcorrin
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Re: 15km Backhaul Problems - Nstream

Tue Oct 13, 2009 5:20 pm

What happens to the ccq levels when you start passing traffic?
 
cmurrayis
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Re: 15km Backhaul Problems - Nstream

Wed Oct 14, 2009 1:34 am

Hi,

Depends onthe time of day, at night they stay pretty much the same, during the day they can go down to 30 - 40% but can still pass the same data rate 3mbps /3mbps as at night.

Cameron
 
shielder
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Re: 15km Backhaul Problems - Nstream

Wed Oct 14, 2009 8:31 pm

mostly the antenna problem, 15 km you need point to point antenna. omni would be too much for that
 
InoX
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Re: 15km Backhaul Problems - Nstream

Wed Oct 14, 2009 8:44 pm

yep, omnis sucks

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