Re: Simple Low Cost WAN Link Simulator Recommendations
I've used WANem (http://wanem.sourceforge.net/) for a last 2 years. Simple WEB-interface, wide range of setting - it is enough fro network engineers. On 17 March 2011 16:45, Loopback loopb...@digi-muse.com wrote: Need the ability to test Network Management and Provisioning applications over a variety of WAN link speeds from T1 equivalent up to 1GB speeds. Seems to be quite a few offerings but I am looking for recommendations from actual users. Thanks in advance.
Software DNS hghi availability and load balancer solution
Does any one know software sollutions (free is preferable) like as cisco GSS and F5 BIG-IP? The main point is that DNS-server (or dns server plugin) must be able to monitor server availability (for example by TCP connect) and from DNS-reply depends on it. I know that it is possible by BIND with set of script. But we are trying to find more usable solution with frendly interface. Thanks a lot.
Re: Network management software with high detailed traffic report
We are using cisco switches like as 3750, 6500 etc. So there is no fairqueue. On 26 November 2010 09:43, Mikael Abrahamsson swm...@swm.pp.se wrote: On Fri, 26 Nov 2010, Sergey Voropaev wrote: We use a several connections to the financial providers. This connections are low bandwidth (up to 2 Mbps). This connections used by a number of front end services from a nubmer of departments and we could not differentiate its and configure QoS. But from time to time some one produce an extremely high traffic spikes (less than 30 seconds) without congestion avoidance mechanisms. Our task - is to find such applications and report to management and developers a problem. Also if we'll be aware about it we could configure QoS. What kind of queuing are you using? It sounds like configuring fair-queue on the interface (if your platform supports that, usually the ones with 2M interfaces do), it should help with the problem you're describing. If you have CPU to spare, configure fair-queue everywhere you can where you don't have a better QoS-configuration in place. It really solves a lot of the problems people are seeing with FIFO and mixed traffic. -- Mikael Abrahamssonemail: swm...@swm.pp.se
Re: Network management software with high detailed traffic report
There is no problem with *NIX from the point of view qualification. But corporate politic use only Windows servers and no any other OS in the production. On 26 November 2010 15:05, Dobbins, Roland rdobb...@arbor.net wrote: On Nov 26, 2010, at 3:59 PM, Sergey Voropaev wrote: I work on this way too. There ais no problem with netflow-sensor. But I can not find good inexpensive collector for Windows which can collect data and do graphic report. Open-source = free. And you should be using *NIX, anyways. Using it for a simple project like this is a good learning experience. ; --- Roland Dobbins rdobb...@arbor.net // http://www.arbornetworks.com Sell your computer and buy a guitar.
Re: Network management software with high detailed traffic report
We use a several connections to the financial providers. This connections are low bandwidth (up to 2 Mbps). This connections used by a number of front end services from a nubmer of departments and we could not differentiate its and configure QoS. But from time to time some one produce an extremely high traffic spikes (less than 30 seconds) without congestion avoidance mechanisms. Our task - is to find such applications and report to management and developers a problem. Also if we'll be aware about it we could configure QoS. On 26 November 2010 08:34, Diogo Montagner diogo.montag...@gmail.comwrote: I am just curios what kind of application/network requires this aggressive monitoring. Is it possible to share this information ? Cheers On 11/26/10, Ivan Brunello ivan.brune...@gmail.com wrote: Sure it upsets. We have a bunch of average-populated 6500s, using the default max age (which was, as far as I remember, 5) made the switches very slow in responding to SNMP queries. set them to 10, and, Gotcha! everything works very well. ivan Date: Tue, 23 Nov 2010 14:25:25 +0200 From: Tassos Chatzithomaoglou ach...@forthnet.gr Subject: Re: Network management software with high detailed traffic report To: nanog@nanog.org Message-ID: 4cebb2b5.5090...@forthnet.gr Content-Type: text/plain; charset=UTF-8; format=flowed There is also CSCsg23226 which might be related. -- Tassos Nick Hilliard wrote on 23/11/2010 01:35: On 22/11/2010 22:56, Tassos Chatzithomaoglou wrote: Does service counters max age help in any way?* *According to Cisco, setting it too low might upset the snmp counters.* https://www.cisco.com/en/US/docs/ios/fundamentals/command/reference/cf_r1.html#wp1067159 The Usage Guidelines are instructive. :-) Although the update interval defaults to 5 seconds, it still appears to update every 9 seconds on my boxes. Nick -- Sent from my mobile device ./diogo -montagner
Network management software with high detailed traffic report
Does any one know the NMS (network management software) which can do the fallowing: 1. Monitor on Cisco Routers/Switches interface utilization every 5-10 seconds and send e-mail alarm when utilization low or high of predefined thresholds. 2. Collect net-flow statistics (at least src/dst) with granularity of 5-10- seconds. The main idea is to have detailed monitoring of the external links and to be able to know why (by what traffic type) and when link was highly utilized. Existing flow-collector can store netflow reports only with 1 minute granularity but we need 5-10 second. As about e-mail alarms - now I do it by embedded event manager on the router. But I think it would be better to use external SNMP software for that. As about detailed to 5-10 second netflow statistics there are 2 ways. 1st - Use port mirror and use some software which can analyze captured traffic and made a good reports. Do you know such software? 2nd - Use SNMP or telnet/ssh for access to the router/switch every 5-10 seconds and catch netflow counters. Do you now such software? thanks in advance for you help.
Re: Network management software with high detailed traffic report
Steinar, I'm sure that router updates its counter more often than 5 seconds. On 22 November 2010 12:46, sth...@nethelp.no wrote: Does any one know the NMS (network management software) which can do the fallowing: 1. Monitor on Cisco Routers/Switches interface utilization every 5-10 seconds and send e-mail alarm when utilization low or high of predefined thresholds. 2. Collect net-flow statistics (at least src/dst) with granularity of 5-10- seconds. The main idea is to have detailed monitoring of the external links and to be able to know why (by what traffic type) and when link was highly utilized. Your requirements are somewhat unrealistic. Even if your NMS can fetch SNMP counters / Netflow info every 5-10 seconds, you have no guarantee that the router *updates* the counters / Netflow info this often. Talk to your router vendor first. Steinar Haug, Nethelp consulting, sth...@nethelp.no
