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alihaji
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avoiding broadcast storm

Sun Dec 10, 2017 2:28 pm

Hi. I'm gonna run A WISP. but i have a problem : broadcast storm. I'm thinking about some solution i've recently found on the web. but dont know whicj one is a better solution and also how to config my devices. can someone help?

thank everybody beforehand
 
alihaji
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Re: avoiding broadcast storm

Fri Dec 15, 2017 10:30 am

Hi. I'm gonna run A WISP. but i have a problem : broadcast storm. I'm thinking about some solution i've recently found on the web. but dont know whicj one is a better solution and also how to config my devices. can someone help?

thank everybody beforehand
Really? No one can help
 
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Petri
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Re: avoiding broadcast storm

Sat Dec 16, 2017 11:37 am

I don't have experience running a WISP, but I can help you write better questions. You didn't get any replies because your post was so vague. There is no way to answer it with the information you provided. You should start by clarifying at least following points, then perhaps someone with WISP experience might use their time to help you out:

I'm gonna run A WISP. Is this a dream you have always had or is this going to happen next week? What is your current situation and knowledge level?
i have a problem : broadcast storm. You currently have a broadcast storm causing you problems, although you don't run a WISP yet? Or is it something you are worried that might affect your future WISP?
I'm thinking about some solution i've recently found on the web. Do you expect us to start googling and guessing what you have found? You should provide a description of the solutions you've come across and include links.
but dont know which one is a better solution The answer depends on the problem, which we don't know.
also how to config my devices. can someone help? This sound like you want someone to configure your WISP infrastructure for you. It takes time and effort and the decisions depend on your circumstances. MikroTik has a good training program. Before setting up a WISP you should at least have MTCNA, MTCRE & MTCWE or equivalent skills.

There are many very experienced and skilful people on this forum. If you have a clearly defined problem you usually get quickly very good solution candidates.
 
pe1chl
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Re: avoiding broadcast storm

Sat Dec 16, 2017 12:23 pm

Very good response, Petri!
There are quite a few vague questions like that on the forum, often followed up with "UP!" or "No reply?".
The users need to understand what they are doing wrong, and that reply provides a good explanation.
 
alihaji
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Re: avoiding broadcast storm

Sun Dec 17, 2017 5:58 am

thank you petri for all the points you just mentioned & sorry for defective post. I'm new fish here & hope to improve the way to ask questions & of course my skills on mikrotik.

It has always been a dream but is going to come true exactly next week. I've some exprience in mikrotik. I have not paticipated in any mikrotik class but i'm almost good at mtcna and mtcwe skills.
i'm introduced to mtcre & know a bit about ospf & ecmp and options in /ip route.
i;ve heard of broadcast storm and the problems it may cause. i'm worried and looking for the best solution. it's better than getting into trouble and look for the cure.
these are the solutions i've found:
1. "horizon" option in bridge port setting.
2. using vlans so the ap's on one pop site cant see other pop sites
3.tunnels like vpls & eoip
and of course there may be other solutions i've never heard of.

at this point i need help to choose between these solutions
 
alihaji
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Re: avoiding broadcast storm

Sun Dec 17, 2017 6:10 am

Very good response, Petri!
There are quite a few vague questions like that on the forum, often followed up with "UP!" or "No reply?".
The users need to understand what they are doing wrong, and that reply provides a good explanation.
i'm agree but i think it happens because mikrotik is used widely around the world. Not everyone can make their point when they're asking a question because of their poor english (i'm one of them too)
you should be much more kind if you wanna help :wink: :wink: :wink: :wink:
 
pe1chl
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Re: avoiding broadcast storm

Sun Dec 17, 2017 12:29 pm

Your problem is you did not even try... English is not my native language either, so I have difficulties as well.
You could have prepared a more detailed question in your own language and paste that into "google translate" to translate it to English.
That would have resulted in a text that is very difficult to understand but at least there would be something to work with.
Now, we have absolutely nothing. So you cannot expect a reply.

Even with your extra information it is difficult to understand what is your problem.
A broadcast storm usually results from some level2 loop. Don't make a loop and you won't have a broadcast storm that way.
You need to explain how and why you have built a loop and then it may be possible to explain how to avoid that.
 
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Petri
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Re: avoiding broadcast storm

Sun Dec 17, 2017 4:56 pm

@alihaji No need to apologise. I just explained why you didn't get any replies. pe1chl is an old timer here and he has seen far more bad posts than me. English is not my native language either. Grammar and spelling errors are tolerated, but language is not an excuse for not providing enough detail to work on.

Like I said, I have never operated a WISP, so I am not going to advise on that. I don't know the pros and cons of the options you listed. Probably the choice depends on your circumstances, which we still don't know. Just one piece of general information. Broadcast storms are a L2 phenomenon. Split your network into several small subnets so you can isolate broadcasts. I know many WISPs have started out with just one network all bridged together so it is all in a single broadcast domain. Don't go there! That's why you need MTCRE skills in addition to MTCWE skills. Like pe1chl wrote, storms are usually caused by loops, which can occur easily in a wireless environment. Avoiding loops is straightforward with good planning and spanning tree protocols. Another cause is a bad software, which reply to a broadcast address - this has happened, too.

Good luck in following your dream!
 
alihaji
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Re: avoiding broadcast storm

Mon Dec 18, 2017 9:22 am

i dont know what circumstances you're talking about.
but i think its better to wait untill next week. if the disaster occured i will look for the solution
anyway thank you for your time
 
Eggplant
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Re: avoiding broadcast storm

Thu Dec 21, 2017 2:05 am

Route the end users and do not bridge them. Problem solved before it exists.
 
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ZeroByte
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Re: avoiding broadcast storm

Thu Dec 21, 2017 2:17 am

Route the end users and do not bridge them. Problem solved before it exists.
Agreed - the more you break up your layer2 broadcast domains, the better off you will be and the more impervious to these layer2 issues your network will be.

Even if you go with the extreme case where each individual AP is a router (not just a bridging AP) then you can completely eliminate the chance for such things by disallowing client-to-client communication on the SSID (In Mikrotik, default-forward=no / in Ubiquiti, it's called client isolation). If you use Mikrotik bridges, you can limit the "east/west" traffic by using split-horizon functionality. In the ports menu, simply set a horizon value on ports where you want this. All ports with the same horizon number will be blocked from communicating with each other.

In the end, I agree with Eggplant that limiting the scope of your layer2 domain is the best way to set up a network.
 
alihaji
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Re: avoiding broadcast storm

Sat Dec 23, 2017 9:04 am

thank you zerobyte.i'll do exactlly as you said

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