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by jpjust
Tue May 03, 2011 11:19 pm
Forum: General
Topic: RB450 as a PPPoE server
Replies: 2
Views: 1000

Re: RB450 as a PPPoE server

Maybe you can provide us with details about amount of traffic consumption by your users? You can check products performance test and compare it with you results: http://routerboard.com/pdf/routerboard_performance_tests.pdf Maybe there is the problem. My traffic is very low. Right now, ether2 (PPPoE...
by jpjust
Tue May 03, 2011 9:31 pm
Forum: General
Topic: RB450 as a PPPoE server
Replies: 2
Views: 1000

RB450 as a PPPoE server

Hello guys. I have some unused RB450 and I had the idea to use them as PPPoE servers. My plan is to install at least 3 of them, so if one gets bad, there are still 2 to serve my customers. So, I tried only one first to test. Last week I got one of these RB450, updated it to ROS 5.2 and configured it...
by jpjust
Tue Nov 17, 2009 11:54 pm
Forum: Wireless Networking
Topic: ROS 3.23 STABLE - TG - PtMP G working fot the 1st time ever
Replies: 2
Views: 889

Re: ROS 3.23 STABLE - TG - PtMP G working fot the 1st time ever

What's that noise control you are using?
by jpjust
Fri Nov 13, 2009 6:30 pm
Forum: Wireless Networking
Topic: RTS/CTS in 802.11b mode
Replies: 0
Views: 525

RTS/CTS in 802.11b mode

Hello, folks.

Does ROS send/respond RTS/CTS frames in 802.11b mode or it's only for 802.11g mode?

TIA
by jpjust
Sat Aug 22, 2009 3:10 pm
Forum: Wireless Networking
Topic: A question about cts-to-self
Replies: 0
Views: 1055

A question about cts-to-self

Hello, folks.

I've seen that wireless-test has cts-to-self protection mode. When using cts-to-self, the AP still sensing the carrier before transmiting or it just sends a CTS to self and transmits?

TIA
by jpjust
Fri Aug 21, 2009 4:12 am
Forum: General
Topic: Another medium access instead of CSMA/CA
Replies: 2
Views: 1048

Re: Another medium access instead of CSMA/CA

Is the "Disable CSMA" option on the Nstreame tab not what you are looking for?

-Louis
Yeah, but it's only for Nstreme mode. I was thinking about something for the general 802.11 mode.
by jpjust
Fri Aug 21, 2009 3:41 am
Forum: General
Topic: Another medium access instead of CSMA/CA
Replies: 2
Views: 1048

Another medium access instead of CSMA/CA

Hello folks. I'd like to suggest another medium access. I think most of problems WISPs have with interference is related to the exposed terminal problem. In my case, for example, I use sector antennas in my ERBs and directional antennas in my clients. When my RouterBOARDs transmit to a client, I'm s...
by jpjust
Mon May 25, 2009 1:50 pm
Forum: Wireless Networking
Topic: RF cable length
Replies: 8
Views: 1089

Re: RF cable length

ste:that's what I meant. This weekend I learned that cable length does matter. Sometimes, a long cable is better than a short one (but not so long). We have to consider the wavelength and other cable's attributes to determine the best size :) I'm still learning how to calculate the correct size. I c...
by jpjust
Thu May 21, 2009 4:58 pm
Forum: Wireless Networking
Topic: RF cable length
Replies: 8
Views: 1089

RF cable length

Hello, folks.

I see some people talking about cutting the RF cable at correct lengths, to avoid standing waves (just as amateur radios do). What do you say about it? Should we really care? Or it doesn't has strong effects in microwaves links?
by jpjust
Fri Apr 03, 2009 2:23 pm
Forum: Wireless Networking
Topic: Why not increase DFS scan time?
Replies: 11
Views: 1770

Re: Why not increase DFS scan time?

I think DFS scans and selects only ONCE (when you enable the interface) ;) you can make use of scripting, to disable/enable interface at 3:00AM for example, to choose best frequency every night. also the DFS does something when it finds a RADAR. It won't work nice, because at 3 AM most of every com...
by jpjust
Tue Mar 31, 2009 5:13 pm
Forum: Wireless Networking
Topic: how select frequency ?
Replies: 7
Views: 2059

Re: how select frequency ?

So, channel usage is more important than noise? I've made some tests here and found out that noisy channels with few networks are better than clean channels with lots of networks. Am I right?
by jpjust
Wed Mar 18, 2009 3:54 pm
Forum: Wireless Networking
Topic: Why not increase DFS scan time?
Replies: 11
Views: 1770

Re: Why not increase DFS scan time?

I know Snooper already, but what I meant was something automatic.
by jpjust
Wed Mar 18, 2009 3:07 pm
Forum: Wireless Networking
Topic: Why not increase DFS scan time?
Replies: 11
Views: 1770

Re: Why not increase DFS scan time?

Hummm, didn't know about it.

So, I'd still suggest another feature, something like "Dynamic Channel Selection" or "Automatic Channel", which would do all those steps I've described before.
by jpjust
Wed Mar 18, 2009 2:25 pm
Forum: Wireless Networking
Topic: Why not increase DFS scan time?
Replies: 11
Views: 1770

Why not increase DFS scan time?

Hello, folks, specially MikroTik developers. DFS is really a cool feature, it can simplify the process of choosing a channel. As the docs say: "AP scans channel list from "scan-list" and chooses the frequency which is with the lowest amount of other networks detected." So, I'd like to suggest a chan...
by jpjust
Mon Mar 02, 2009 2:25 pm
Forum: Wireless Networking
Topic: Changing receive sensitivity via software
Replies: 7
Views: 2861

Re: Changing receive sensitivity via software

I've read somewhere that Adaptive Noise Immunity changes card's sensitivity dynamically to avoid interference (I don't know if it is true, but that's what I've read). From this reading, I've had the idea to change the sensitivity manually. I've thought about using low gain antennas already, but as R...
by jpjust
Sun Mar 01, 2009 3:38 am
Forum: Wireless Networking
Topic: Changing receive sensitivity via software
Replies: 7
Views: 2861

Changing receive sensitivity via software

Hello, folks. Is there any way to change the receive sensitivity via software? Let's suppose I have an AP running ROS and all of its clients are connected at -70 dBm or higher. So, I'd like to set the receiver sensitivity to, let's say, -75 dBm, so, lower signals from other radios couldn't interfere...
by jpjust
Fri Feb 27, 2009 2:14 am
Forum: Wireless Networking
Topic: R5H mini pci wireless card noisy ...
Replies: 2
Views: 914

Re: R5H mini pci wireless card noisy ...

I've heard the same noise in EMP-8602 and R52. I think it's normal :)
by jpjust
Mon Feb 16, 2009 2:19 pm
Forum: Wireless Networking
Topic: 411 client won't connect with rts/cts turned on.
Replies: 6
Views: 958

Re: 411 client won't connect with rts/cts turned on.

Until now is OK. They are connected to a R52.

We've got an increase in performance, but I'm not sure if it's related to RTS/CTS or card change, because we were using R52H before and changed to R52 the same time we've started to test RTS :p
by jpjust
Fri Feb 13, 2009 4:50 pm
Forum: Wireless Networking
Topic: 411 client won't connect with rts/cts turned on.
Replies: 6
Views: 958

Re: 411 client won't connect with rts/cts turned on.

I enabled it on the ap also.
I think you don't need RTS in AP, as every client will sense the channel.

This week I'm testing RTS/CTS in my clients. They use Ovislink, Edimax or Zinwell radios. I'm setting RTS Threshold on these radios to 500 to test.
by jpjust
Thu Feb 12, 2009 5:50 pm
Forum: Wireless Networking
Topic: 411 client won't connect with rts/cts turned on.
Replies: 6
Views: 958

Re: 411 client won't connect with rts/cts turned on.

You've enabled RTS on clients only or on AP also?
by jpjust
Wed Feb 11, 2009 5:57 pm
Forum: Wireless Networking
Topic: RTS/CTS options in ROS
Replies: 7
Views: 1447

Re: RTS/CTS options in ROS

I've enabled RTS/CTS in a NanoStation5 which connects to a RB333+EnGenius 8602 as AP, but didn't work. But, I've also enabled RTS/CTS in some Edimax and OvisLink 2,4 GHz radios which connect to a RB333+R52H and it worked fine. Does RTS/CTS answers has anything to do with the wireless card we use in ...
by jpjust
Sat Feb 07, 2009 6:21 pm
Forum: Wireless Networking
Topic: RTS/CTS options in ROS
Replies: 7
Views: 1447

Re: RTS/CTS options in ROS

I think the point is enabling RTS/CTS on client side. Why? Because when the AP sends a frame, everybody listen to it and wait (CSMA/CA). But when a client wants to send a frame, it needs to RTS first, so the AP can CTS everybody and everybody will wait. I'm talking about the hidden node problem, whi...
by jpjust
Sat Jan 31, 2009 2:25 am
Forum: Wireless Networking
Topic: Confused about rts/cts
Replies: 64
Views: 27718

Re: Confused about rts/cts

The mad reason to turn off ROS RTS/CTS responses is to disable RTS/CTS at all in a network and test the effects. As a computer scientist, I enjoy doing such things. :) It helps me to learn more. Of course, in a real application, I'd let RTS/CTS working as normal. But, anyway, I think disabling RTS/C...
by jpjust
Fri Jan 30, 2009 9:55 pm
Forum: Wireless Networking
Topic: Confused about rts/cts
Replies: 64
Views: 27718

Re: Confused about rts/cts

I've got another question now: is it possible (or, will it be possible via wireless-test) to disable RTS responses totally? I mean, even if a client sends a RTS frame, ROS won't answer with CTS (I know this might sound crazy :p)
by jpjust
Fri Jan 30, 2009 2:50 pm
Forum: Wireless Networking
Topic: Confused about rts/cts
Replies: 64
Views: 27718

Re: Confused about rts/cts

That's what I wanted to know. Thanks! :)
by jpjust
Fri Jan 30, 2009 1:51 pm
Forum: Wireless Networking
Topic: Confused about rts/cts
Replies: 64
Views: 27718

Re: Confused about rts/cts

OK, it's like this: Previously RouterOS AP always replied with CTS to those who asked RTS, but RouterOS client never asked for RTS. Ie. the support was not in the client. Then we introduced NStreme polling to solve the hidden node problem. Right now, in the Wireless Test package, we have also inclu...
by jpjust
Thu Jan 29, 2009 10:43 pm
Forum: Wireless Networking
Topic: Confused about rts/cts
Replies: 64
Views: 27718

Re: Confused about rts/cts

No RTS/CTS in the past and polling was only used when Nstream was enabled.
So, the default behaviour of ROS is to not use RTS/CTS?
by jpjust
Tue Jan 27, 2009 4:26 pm
Forum: Wireless Networking
Topic: Mikrotik Boards supports 802.11n????
Replies: 12
Views: 1942

Re: Mikrotik Boards supports 802.11n????

Does have MikroTik staff already started developing something on 802.11n standard? Any idea when it will be available to the public?
by jpjust
Fri Jan 23, 2009 9:18 pm
Forum: Wireless Networking
Topic: RTS/CTS options in ROS
Replies: 7
Views: 1447

RTS/CTS options in ROS

Hello, folks. Since I've started using MK, I've noticed that WinBox doesn't show RTS/CTS options just like ordinary APs like Zinwell, Ovislink, Edimax, etc. Well, I've never used these settings in those other APs, but I'm curious to know why ROS doesn't let us change them. It's some kind of automati...
by jpjust
Fri Jan 16, 2009 4:03 pm
Forum: Wireless Networking
Topic: Strange behavior under interference
Replies: 0
Views: 402

Strange behavior under interference

Hello folks. Two of my 2.4 GHz POPs are under heavy interference, so, I did a Freq. Usage to try to select the best channel. In one of them, I've found a channel with -97 dBm noise level, but some 802.11 usage. So, as recommended by another member, I choosed this channel, because the others were und...
by jpjust
Fri Jan 16, 2009 3:36 pm
Forum: Wireless Networking
Topic: Adaptive noise immunity - Client/AP and client mode
Replies: 9
Views: 13815

Re: Adaptive noise immunity - Client/AP and client mode

I haven't had much luck with API in Client/AP mode. It adds latency and doesn't seem to work that well, makes thing worse if anything. Tried with XR9, SR2, R52, SR9 etc. I would not recommend using it, but in some cases it may work, but normally, I would not use it. I didn't had problems with ANI h...
by jpjust
Tue Jan 13, 2009 10:08 pm
Forum: Wireless Networking
Topic: Adaptive noise immunity - Client/AP and client mode
Replies: 9
Views: 13815

Re: Adaptive noise immunity - Client/AP and client mode

Client mode: means that Noise Immunity will be activated only when the radio is in client mode (station).
AP and Cliente mode: means that Noise Immunity will be activated in both modes (station and bridge/ap bridge).

Did you get good results with Adaptive Noise Immunity turned on?
by jpjust
Fri Jan 09, 2009 3:38 pm
Forum: Wireless Networking
Topic: Adaptive Noise Immunity support
Replies: 3
Views: 996

Re: Adaptive Noise Immunity support

Thank you for the fast reply :) this will be shown for most atheros cards, because the driver is the same. check card specifications to find out what you have. So I did. R52H.pdf (downloaded from routerboard.com) says "Chipset: Atheros AR5414". EMP's datasheet doesn't say anything about its chipset....
by jpjust
Fri Jan 09, 2009 3:19 pm
Forum: Wireless Networking
Topic: Adaptive Noise Immunity support
Replies: 3
Views: 996

Adaptive Noise Immunity support

Hello, folks.

Do R52H and EMP-8602 Plus support Adaptive Noise Immunity? I'm asking this because ROS' doc says that it is supported only in AR6001X and newer chipsets and WinBox shows AR5414 for both cards, but the ANI option is available via WinBox.
by jpjust
Tue Dec 09, 2008 4:31 pm
Forum: Wireless Networking
Topic: Frequency usage vs noise floor
Replies: 8
Views: 6829

Re: Frequency usage vs noise floor

The first two cards were probably a waste of your time and money. The R52H is good, the XR2 is best. Yeah, I already realized that :) My goal is to change everything to XR2 in the future. That's half of what I mean by "right parts." Also, make sure you use good antennas which fit your application. ...
by jpjust
Mon Dec 08, 2008 4:15 pm
Forum: Wireless Networking
Topic: Frequency usage vs noise floor
Replies: 8
Views: 6829

Re: Frequency usage vs noise floor

That was I always thought, but I need to be sure :) My problem is that my city is full of pirate WISPs (WISPs that don't have a license to operate). They always use the card's maximum output power, so, noise here is critical! In the US and Canada, a WISP doesn't need a license so there are a lot mo...
by jpjust
Mon Dec 08, 2008 1:26 am
Forum: Wireless Networking
Topic: Frequency usage vs noise floor
Replies: 8
Views: 6829

Re: Frequency usage vs noise floor

Thanks for the clarification.

That was I always thought, but I need to be sure :) My problem is that my city is full of pirate WISPs (WISPs that don't have a license to operate). They always use the card's maximum output power, so, noise here is critical!
by jpjust
Sun Dec 07, 2008 2:25 am
Forum: Wireless Networking
Topic: Mikrotik WISPs: Where?
Replies: 96
Views: 48443

Re: Mikrotik WISPs: Where?

RG3.Net - http://www.rg3.net

Feira de Santana, BA, Brazil. We use MikroTik with RouterBOARDs in every ERB. Only our point-to-point solutions still using old Terabeams, but we are going to replace it with RBs soon. A little bit more than 500 customers in our network.
by jpjust
Sun Dec 07, 2008 2:21 am
Forum: Wireless Networking
Topic: Frequency usage vs noise floor
Replies: 8
Views: 6829

Frequency usage vs noise floor

Hello, folks.

When I use the frequency usage monitor on a wireless card, it shows me two pieces of information: usage (how many networks are using that channel) and noise floor.

So, my doubt is: what's the best choice? Less network usage or less noise floor?

TIA