Hi again, Kevin:

I'd expect IM is reporting based on MIB values.
Try looking at IfInDiscards and IfOutDiscards.

Evan

On 2011-09-09, at 1:02 AM, Kevin Wigle wrote:

> Ok, after googling  I found a very recent conversation on the same subject.
> But it seems there is divided discussion on interface discards.
> 
> And I apologize to Evan - I didn't understand his suggestion about turning
> off interface discards - I thought it was something configured on the device
> similar to the "fault-finding" items on HP switches but I found it in IM and
> I checked and indeed that switch doesn't "bubble" anymore.
> 
> What's interesting about all the threads I read and my own experience is
> that many times I see interfaces reporting thousands of discards and no
> matter how hard we look the hardware never agrees with what IM is saying -
> aside from the fact that the hardware is sending SNMP info saying there is a
> problem.
> 
> Whatever, Dartware typically blames the vendor for having a faulty
> implementation of SNMP and if we are going to accept that then in that case
> I think there is a reason enough to allow a global option for Set Behavior
> to ignore interface disregards and not have to set it switch by switch.
> Perhaps it shouldn't be set by default but at least give the admin the
> choice.  If he sets it he gets what he pays for.
> 
> Usually Dartware is pretty forward thinking and listens to the admins out
> there and I think this time the majority of admins would like to have the
> choice.
> 
> regards,
> 
> Kevin
> 
> -----Original Message-----
> From: Kevin Wigle [mailto:[email protected]] 
> Sent: 08 September, 2011 12:04 AM
> To: 'InterMapper Discussion'
> Subject: RE: [IM-Talk] SNMP Issues
> 
> nope - in all the years in this job I have only seen 2 switches configured
> with that and they were local.
> 
> If I set that option will that stop IM from bubbling?
> 
> I still wonder, what does IM see that the hardware won't show me directly?
> And since IM is polling the hardware to get info to display bubbles - what
> is actually happening - and what is to be believed?
> 
> Kevin
> 
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]] On Behalf Of Evan Gamblin
> Sent: 07 September, 2011 11:21 PM
> To: InterMapper Discussion
> Subject: Re: [IM-Talk] SNMP Issues
> 
> Kevin:
> 
> Don't you usually set Ignore Interface Discards on switches?
> 
> Evan
> 
> On 2011-09-07, at 10:31 PM, Kevin Wigle wrote:
> 
>> Dear Group,
>> 
>> I'm sure this has been touched on before but I need a refresher on 
>> just how error indications on Intermapper relate to the actual 
>> hardware being monitored.
>> 
>> Specifically we have a site that has two switches connected at 100 full.
>> 
>> Often the link between the switches will be "bubbling" away.  Open 
>> status and it will say something like 4000 discards a minute (and higher).
>> 
>> When I telnet to the switch and show stats on the interface the only 
>> errors I see are 16 FCS errors.  Not quite the 4000+ I expected to see.
>> 
>> So what do I trust?
>> 
>> How do I explain to other support personnel just what it means when IM 
>> says that but the actual hardware says something else?
>> Especially bosses - they want to see that IM is actually worth having 
>> but if we can't trust what we see - then what?
>> 
>> All opinions welcome.
>> 
>> regards,
>> 
>> Kevin
>> 
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