Re: NBNS (Netbios) storm, how to prevent?

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From: Brian Whiting (nospam_at_deny.com)
Date: 02/25/05 

Date: Fri, 25 Feb 2005 17:13:53 -0500

I just saw this post so I'm late to this discussion. You say that when you
get the nbns broadcasts your Windows network is greatly affected? Can you
capture a couple of the packets in ethereal and paste them into a reply so I
can look at them? What you describe, a general network slowdown might well
come from broadcast packets if your network shares a common layer 2
broadcast domain, which it sounds like it does. Are the packets coming
specifically from the Linux box, or one of your XP clients that uses the
Samba server?

<Andy> wrote in message news:uJ3Ib2VCFHA.2032@tk2msftngp13.phx.gbl...
>
> "Phillip Windell" <@.> wrote in message
> news:##NyGtTCFHA.1836@tk2msftngp13.phx.gbl...
>> <Andy> wrote in message news:eYmfpGKCFHA.1400@TK2MSFTNGP11.phx.gbl...
>> > Fix the Linux box! yeah! well they do fix it but then the same problem
>> > occurs again (but usually a different host name) and I am not qualified
> to
>> > work on Linux.
>>
>> I understnad the feeling,...I'm in the same position. But that does not
>> change reality,...the source of the problem is the Linux boxes,...that is
>> where the problem exists and is where it is to be solved. You cannot
>> solve
>> the problem where it doesn't exits.
>>
>> It doesn't matter how strange the Linux boxes are,...they can't use what
>> they don't have. If they don't have the Name Server (NBNS) set in their
>> configuration they they can not use such an IP# in a "directed" NBNS
> Query,
>> and you no longer have a problem. It isn't that big a mystery. The
>> peole
>> that built or setup these things know *exactly* where that setting is
>> because they put it there,...they can remove it as well.
>>
>> You could also post the whole question in a Newsgroup devoted to Linux
>> and
>> have an answer in about 20 minutes.
>>
>> > Spent an hour this morning trying out VLAN on a couple of spare ports
>> > (static), easy to setup and it works. If we could configure routing
>> between
>> > VLANs would this be an acceptable way to segment the network? I will
> have
>> a
>> > go at setting up VLAN IP routing tomorrow and see where that takes us.
>>
>> You are pretty much wasting your time if you are doing that to solve this
>> issue. The most you will accomplish is keeping the NBNS querys in the
> Music
>> Room's subnet but that won't be helping the issue in the Music Room and
> they
>> will still be complaining.
>>
>> However splitting up the sytems in to a couple of subnets is a good thing
>> over all.
>>
>> --
>>
>> Phillip Windell [MCP, MVP, CCNA]
>> www.wandtv.com
>>
>>
>
> Phillip,
>
> Ah but what happens in the Music Room isn't my problem! So would it be OK
> to
> use VLANs to reduce the number of hosts per subnet? Seems easy and cheap.
> Almost too good to be true! But is it?
>
> Andy.
>
>

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