Re: Looking for SNMP myths
Hi Michael Schwartzkopff wrote: Hi, I am preparing a talk about the SNMP protocol and especially about the net- snmp implementation on a network monitoring conference. I am looking for the most common and most widespread prejudice against using SNMP. Of course anybody heard about SNMP not beeing safe, SNMP filling up the network or SNMP not beeing reliable. Please mail me any other myths about SNMP you heard. My talk should invalidate all these claims. One of the most common excuses I hear is Too much SNMP Polling will load the router CPU too much, with respect to polling or walking certain sub-trees of router mibs for high-end cisco routers. Although it is possible to place some router models under resource strain if you really try, I hear this excuse used often to create obstacles to monitoring certain router/switch sub-trees. I think it would be excellent if you could clear up once and for all what kind of load SNMP polling patterns would place on various common series of routers/switches. Bearing in mind many high end routers effectively implement their SNMP agents in dedicated feature cards, so overloading the route processors is not possible ... Thanks for interesting mails. Regards, Traiano Welcome TENET -- Come build with us! The BlackBerryreg; Developer Conference in SF, CA is the only developer event you need to attend this year. Jumpstart your developing skills, take BlackBerry mobile applications to market and stay ahead of the curve. Join us from November 9#45;12, 2009. Register now#33; http://p.sf.net/sfu/devconf ___ 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
Re: Tools for Statistical Processing of snmptrapd data
Many thanks, Mike! This has been helpful. Regards, T. Mike Ayers wrote: From: Traiano Welcome [mailto:twelc...@tenet.ac.za] Sent: Thursday, September 03, 2009 2:43 AM It looks like best option would be to script something to parse snmptrapd logs and draw these stats periodically. You can also customize the format that traps are logged in, which should help make parsing easier. Looking at my snmptrapd.log, I see traps come through with what seems to identify the sending host: [UDP: [196.21.61.1]:64714]: --- 2009-09-03 11:33:45 UNKNOWN [UDP: [196.21.61.1]:64714]: .1.3.6.1.2.1.1.3.0 = Timeticks: (325635303) 37 days, 16:32:33.03 .1.3.6.1.6.3.1.1.4.1.0 = OID: .1.3.6.1.6.3.1.1.5.5 .1.3.6.1.4.1.9.2.1.5.0 = IpAddress: 196.26.130.34 .1.3.6.1.4.1.9.9.412.1.1.1.0 = INTEGER: ipv4(1) .1.3.6.1.4.1.9.9.412.1.1.2.0 = STRING: --- Although the host specified above might be proxy for other hosts, I'd be able to differentiate knowing the location of the agents, and still draw some kind of rough statistics on the 'highest sending proxy'. Does this sound reasonable? Yes, you seem to understand the key issue - forwarded traps don't have an indication of their source. One workaround for this is to use different community names for each source engine, but this has its drawbacks, mostly in administrative overhead. I was hoping for builtin features :-) Anyhow, I think the best option here would be to use a generic munin plugin to monitor snmptrapd. You could also install snmpd with the host resources MIBs, if they're supported on your system. HTH, Mike -- Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july ___ 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
Re: Tools for Statistical Processing of snmptrapd data
Hi Mike Mike Ayers wrote: From: Traiano Welcome [mailto:twelc...@tenet.ac.za] Sent: Wednesday, September 02, 2009 1:40 AM Are there any widely used scripts for extracting performance statistics from snmptrapd and it's logs? We would like to monitor the trap collector and get stats like the following: 1. What hosts are sending traps to the collector, and what is the highest sending host by volume for a given day 2. Which host is sending traps at the highest rate? 3. What is the most frequently sent trap in any given time interval (15 mins - 60 mins) Intermediary logic (glue logic) like this is rarely prepackaged, because it is specific to the data generator, the target presentation system, and the data you wish to display. You may want to review the available free NMS packages to see what they may provide out of the box. Note that community based (v1/v2c) traps do not contain source identifiers. It looks like best option would be to script something to parse snmptrapd logs and draw these stats periodically. Looking at my snmptrapd.log, I see traps come through with what seems to identify the sending host: [UDP: [196.21.61.1]:64714]: --- 2009-09-03 11:33:45 UNKNOWN [UDP: [196.21.61.1]:64714]: .1.3.6.1.2.1.1.3.0 = Timeticks: (325635303) 37 days, 16:32:33.03 .1.3.6.1.6.3.1.1.4.1.0 = OID: .1.3.6.1.6.3.1.1.5.5 .1.3.6.1.4.1.9.2.1.5.0 = IpAddress: 196.26.130.34 .1.3.6.1.4.1.9.9.412.1.1.1.0 = INTEGER: ipv4(1) .1.3.6.1.4.1.9.9.412.1.1.2.0 = STRING: --- Although the host specified above might be proxy for other hosts, I'd be able to differentiate knowing the location of the agents, and still draw some kind of rough statistics on the 'highest sending proxy'. Does this sound reasonable? Also, are there any tools available to monitor the resource utilisation of snmptrapd, i.e cpu, memory? Use whatever you use to monitor any other process on your system. There's nothing special about snmptrapd that way. I was hoping for builtin features :-) Anyhow, I think the best option here would be to use a generic munin plugin to monitor snmptrapd. HTH, Mike Many Thanks, T.G.W -- Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july ___ 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
Tools for Statistical Processing of snmptrapd data
Hi List Are there any widely used scripts for extracting performance statistics from snmptrapd and it's logs? We would like to monitor the trap collector and get stats like the following: 1. What hosts are sending traps to the collector, and what is the highest sending host by volume for a given day 2. Which host is sending traps at the highest rate? 3. What is the most frequently sent trap in any given time interval (15 mins - 60 mins) Also, are there any tools available to monitor the resource utilisation of snmptrapd, i.e cpu, memory? Thanks in Advance, T.G.W TENET (Tertiary Education and Research Network) -- Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july ___ 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
