nanog mailing list archives
Re: SNMP - monitoring large number of devices
From: Dan White <dwhite () olp net>
Date: Tue, 29 Sep 2015 15:37:51 -0500
On 09/29/15 22:20 +0200, Pavel Dimow wrote:
recently I have been tasked with a NMS project. The idea is to pool about 20 OID's from 50k cable modems in less then 5 minutes (yes, I know it's a one million OID's). Before you say check out some very professional and expensive solutions I would like to know are there any alternatives like open source "snmp framework"? To be more descriptive many of you knows how big is the mess with snmp on cable modem. You always first perform snmp walk in order to discover interfaces and then read the values for those interfaces. As cable modem can bundle more DS channels, one time you can have one and other time you can have N+1 DS channels = interfaces. All in all I don't believe that there is something perfect out there when it comes to tracking huge number of cable modems so I would like to know is there any "snmp framework" that can be exteded and how did you (or would you) solve this problem.
I've done about ~60,000 OID queries (over a few dozen devices) per 5 minutes using OpenNMS, which is Java based. At the scale you're looking at, disk I/O would be a major performance issue (if using rrdtool). Google for 'Tuning RRD' for some tips that can make a significant difference. -- Dan White
Current thread:
- SNMP - monitoring large number of devices Pavel Dimow (Sep 29)
- Re: SNMP - monitoring large number of devices Scott Helms (Sep 29)
- Re: SNMP - monitoring large number of devices Jared Mauch (Sep 29)
- RE: SNMP - monitoring large number of devices Jameson, Daniel (Sep 29)
- Re: SNMP - monitoring large number of devices Dan White (Sep 29)
- Re: SNMP - monitoring large number of devices Dale W. Carder (Sep 29)
- Re: SNMP - monitoring large number of devices William Herrin (Sep 29)
- RE: SNMP - monitoring large number of devices Nick Ellermann (Sep 29)
- Re: SNMP - monitoring large number of devices Blake Hudson (Sep 29)
- RE: SNMP - monitoring large number of devices Jameson, Daniel (Sep 29)
- Re: SNMP - monitoring large number of devices Robert Drake (Sep 29)
- RE: SNMP - monitoring large number of devices Joel Whitcomb (Sep 29)
- Re: SNMP - monitoring large number of devices Tom Sands (Sep 29)
- Re: SNMP - monitoring large number of devices Pavel Dimow (Sep 30)
- Re: SNMP - monitoring large number of devices Colton Conor (Sep 30)
- Re: SNMP - monitoring large number of devices Tom Sands (Sep 29)