[rrd-users] Re: Network downtime or uptime
Alex van den Bogaerdt
alex at ergens.op.het.net
Thu Jan 29 09:11:17 MET 2004
On Wed, Jan 28, 2004 at 04:33:37PM -0800, Joubin Moshrefzadeh wrote:
> Ok, here's a question... I've seen all sorts of applications of MRTG and RRDtool to keep track of traffic patterns, but no mention of actual network downtime or uptime.
I think I've seen it mentioned. Can't remember when.
> Perhaps this isn't as big a deal to most users, I don't know. But anyway, my boss would like some stats to show our overall campus networks health/connectivity rates... anyone tried to gather this kind of stats using RRDtool and if so, would you like to share your approach?
> I have a crude approach:
> 1. do an snmpget on a switch
> 2. based on the response, increment an uptime or downtime counter (both are DS in an rrd)
> 3. generate graphs showing downtime (percentage) and uptime
Why two counters. Isn't uptime+downtime equal to 100% ?
How are you going to determine the amount of up- and downtime in each
polling interval? Perhaps device uptime is the best to look at.
If you have a redundant router (or so), when do you speak of downtime?
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