RMON might come in usefull. If you configure each interface for the statistics group with 300 buckets and an interval of 1 second you will receive a trap every 300 seconds teling you the buckets are full and you will need the poll the node to gather the data then issue a reset, which will empty the buckets. Using RMON in this way can be very memory intensive.
On Sun, May 08, 2016 at 12:11:02PM +0200, Richard Mayers wrote: > Hi, > > Thanks for the replies. > > What about using Traps? Can I make the routers send me the counters > every second ? Is it hard to set up? > > Kind regards, > Richard > > 2016-05-07 20:56 GMT+02:00 James Leu <j...@mindspring.com>: > > For my day job we tried open source packages for SNMP polling > > like: > > > > mrtg > > cricket > > > > They were fine for small numbers and long intervals, but will not scale to > > your usage. > > > > I wrote an implementation from scratch that handles 10K variables > > on 5 minute interval. So it can be done. > > > > Issues I think you will run into: > > > > router CPU: hitting a device every second for a number of interfaces may > > consume > > too much CPU time to be practical. > > > > storage IO: if you are successful in retrieving the data, standard DB > > storage > > even RRD will not be able to handle the IO load > > > > Things to consider: > > > > Bulk SNMP gets > > RMON > > local device scripting, I believe Cisco routers can do local TCL scripting > > and junos based devices have local scripting as well. > > > > Directory based queues with small files storing samples > > > > Good luck with your work. > > > > On Sat, May 07, 2016 at 05:20:53PM +0200, Richard Mayers wrote: > >> Hi folks, > >> > >> For my master thesis I am doing a load balancing project and I have to > >> know the link usage if possible every second. For that I set the > >> refresh interval to 1 second, so every thing is good so far. > >> > >> My problem is that I am working with big topologies and I may have 200 > >> or more routers. If I get the counters polling it takes forever I can > >> not poll the routers one by one, or not even using threads (at some > >> point it would not scale). > >> > >> What would be the best way to get all the counters ? > >> > >> Since I am simulating everything in a single machine I can do a trick > >> and write the counters in a file, however that will not be useful when > >> I test my solution in a real network. > >> > >> Kind regards, > >> Richard > >> > >> ------------------------------------------------------------------------------ > >> Find and fix application performance issues faster with Applications > >> Manager > >> Applications Manager provides deep performance insights into multiple > >> tiers of > >> your business applications. It resolves application problems quickly and > >> reduces your MTTR. Get your free trial! > >> https://ad.doubleclick.net/ddm/clk/302982198;130105516;z > >> _______________________________________________ > >> Net-snmp-users mailing list > >> Net-snmp-users@lists.sourceforge.net > >> Please see the following page to unsubscribe or change other options: > >> https://lists.sourceforge.net/lists/listinfo/net-snmp-users > > > > > > -- > > James R. Leu > > j...@mindspring.com -- James R. Leu j...@mindspring.com ------------------------------------------------------------------------------ Find and fix application performance issues faster with Applications Manager Applications Manager provides deep performance insights into multiple tiers of your business applications. It resolves application problems quickly and reduces your MTTR. Get your free trial! https://ad.doubleclick.net/ddm/clk/302982198;130105516;z _______________________________________________ Net-snmp-users mailing list Net-snmp-users@lists.sourceforge.net Please see the following page to unsubscribe or change other options: https://lists.sourceforge.net/lists/listinfo/net-snmp-users
