[AusNOG] Switch Port Utilisation Monitoring

[Bill Walker]

If you run snmptrapd on a Linux box you can set that up to run a script when you get an interface up/down. In turn that script could log that data to a database which could hold switch ip, port number, state.. Etc

In my mind that would be the simplest option. If you know perl or php or something similar.

Sent from my Motorola mr1

> On 14/04/2016, at 4:31 PM, Nathan Phelan <nathan at interconnekt.com.au> wrote:
> 
> Logging SNMP traps to some sort of database (as per BB’s suggestion) sounds like the way to go.
> If you don’t feel like rolling your own though you could try http://www.librenms.org/ (it’s a fork of Observium) – it has a per device event log (stored in mysql) which is searchable.
> Cheers,
> Nathan
>  
> From: AusNOG [mailto:ausnog-bounces at lists.ausnog.net] On Behalf Of Ben Buxton
> Sent: Thursday, 14 April 2016 1:39 PM
> To: Tim Raphael <raphael.timothy at gmail.com>; Paul Wilkins <paulwilkins369 at gmail.com>
> Cc: <ausnog at lists.ausnog.net> <ausnog at lists.ausnog.net>
> Subject: Re: [AusNOG] Switch Port Utilisation Monitoring
>  
>  
> Define "used".
>  
> Link up or actually carrying (meaningful) traffic?
> 
> For the former, you'd want to capture events as they happen, typically via snmp traps. Then just look at  how many reported a link up trap (including those that havent reported link down since the last interval).
>  
> For the latter, a raw packet count might suffice, but you'll have difficulty differentiating idle/keepalive traffic if the amount is low.
> 
> Personally, I'd go with snmp traps/polls injected into Prometheus, but many people havent the time or inclination to change their mindset into vector/timeseries based systems (despite the advantages).
> 
> BB
>  
> On Thu, Apr 14, 2016 at 1:28 PM Tim Raphael <raphael.timothy at gmail.com> wrote:
> Lets assume I have SNMP available.
>  
> Will Cacti be able to tell me over (for example) a week how many and which switch ports are used?
>  
> - Tim
>  
>  
>  
>  
> On 14 Apr 2016, at 11:27 AM, Paul Wilkins <paulwilkins369 at gmail.com> wrote:
>  
> MRTG and/or Cacti.
> 
> (Assuming a "managed" switch ie. SNMP)
>  
> Kind regards
> 
> Paul Wilkins
>  
> On 14 April 2016 at 13:20, Tim Raphael <raphael.timothy at gmail.com> wrote:
> Hi All,
> 
> I would like a tool that could tell me exactly how many switch ports are in use across a given time period.
> This is an enterprise environment so it’s not just the case of taking a snapshot in time, devices turn on and off so I’d want something that could monitor the port counts for a week or so and spit out a report.
> 
> Also, as per usual, the cheaper (free?) the better!
> 
> Any ideas?
> 
> - Tim
> 
> 
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