[c-nsp] 7604 incorrent counter values on VLAN interface

[Blake Dunlap]

My mistake. I full own I was off by an order of magnitude due to not
working on it in a long time. It is indeed a bit over 100m or so, not
1g

On Fri, May 22, 2015 at 11:37 AM, Bill Wichers <billw at waveform.net> wrote:
> Correct, they will wrap when you have moved more than about 4 billion bytes
> (2^32) in a single 5 minute polling cycle. That works out to just over
> 114.5Mb/s
>
> It's usually easiest these days to just use 64 bit counters for everything,
> but with anything over essentially a 100M interface it's essential.
>
> For the original poster: you might want to have Cacti rescan for interfaces
> on the device you're watching. I've seen VLANs show bad info because Cacti
> isn't polling the correct counter for the interface it thinks it's watching.
> For this reason I always watch all the VLANs and the physical interface
> they're bound to (on aggregator devices) so that there is a sanity check for
> incorrect graphs. If all the VLANs don't add up to roughly the same as the
> physical interface then you know there is a problem with one or more of the
> graphs.
>
> Also, in the web interface for Cacti, if you select the type of graph in the
> lower right in the interfaces screen for a device, it will gray out all the
> interfaces you're already graphing with that graph type. You can quickly
> tell if you're using 32 or 64 bit counters for a given graph that way.
>
>   -Bill
>
>
>> -----Original Message-----
>> From: cisco-nsp [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of
>> Mark Tinka
>> Sent: Friday, May 22, 2015 2:30 PM
>> To: Blake Dunlap
>> Cc: cisco-nsp at puck.nether.net
>> Subject: Re: [c-nsp] 7604 incorrent counter values on VLAN interface
>>
>>
>>
>> On 22/May/15 20:28, Blake Dunlap wrote:
>> > Are you sure this isn't a counter wrap issue? Are you using the 64 bit
>> > counters or the default 32 bit in cacti?  The wrap line is right
>> > around 1gig is why i ask.
>>
>> I've generally found 32-bit counters to wrap around 120Mbps.
>>
>> Mark.
>> _______________________________________________
>> cisco-nsp mailing list  cisco-nsp at puck.nether.net
>> https://puck.nether.net/mailman/listinfo/cisco-nsp
>> archive at http://puck.nether.net/pipermail/cisco-nsp/
>
> _______________________________________________
> cisco-nsp mailing list  cisco-nsp at puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-nsp
> archive at http://puck.nether.net/pipermail/cisco-nsp/