Latency question

Thu Mar 18 16:11:09 UTC 2010

On 3/18/2010 11:00, Brandon Kim wrote:
> 
> That was pretty quick.
> 
> 
> But what do you mean by spewing stuff? It would help the rest of us
> understand for possible future issues we may run into ourselves.....

Good question.  Without thinking about it I saw in my mind's eye a
situation we used to see at $EX-EMPLOYER (who was fond of the absolute
smallest-dollar-amount-per-immediate-problem "solutions") who bout toy
4-port hubs by the pallet-load.

These little gems had the endearing habit of spewing random bits onto
the wire whenever the wall-wart failed--which they frequently did.

I had MRTG graphs of every switch and router port  so I could quickly
determine which leg the current culprit was on.

Never solved the problem of having two or three go bad, which, believe
it or not, complicates the issue.

But the graphs did allow me to identify the port and shut it down saving
the rest of the network.
> 
> 
> 
> 
>> Subject: Re: Latency quesstion From: dennis-lists at thenose.net Date:
>> Thu, 18 Mar 2010 10:50:20 -0500 To: nanog at nanog.org
>> 
>> Found a MAC address spewing stuff. looks like we have our culprit.
>> thanks EVERYONE!
>> 
>> -Dennis
>> 
>> On Mar 18, 2010, at 9:56 AM, Dennis Dayman wrote:
>> 
>>> have a friend who has 21 floors of a building in DFW, multiple
>>> switches, etc and they started to have latency issues this
>>> weekend where half if not all packet are being dropped to folder
>>> shares, printers, etc. Suggestions on how they can troubleshoot
>>> that? call in a company to help identify it?
>>> 
>>> -Dennis
>>> 
>>> 
>>> 
>>> 
>>> 
>> 
>> 
>> 
> 

-- 
Democracy: Three wolves and a sheep voting on the dinner menu.
(A republic, using parliamentary law, protects the minority.)

Requiescas in pace o email
Ex turpi causa non oritur actio
Eppure si rinfresca

ICBM Targeting Information:  http://tinyurl.com/4sqczs
http://tinyurl.com/7tp8ml