On Wed, 2005-10-12 at 06:57 +0000, Prasad Kularatne wrote: > Hi folks, > I am carrying out a research in finding out the sensitivity of regular > traffic to iSCSI traffic in a LAN environment. This requires analysis of > the traffic profiles of different TCP traffic types and their efffects on > the queueing. > > I am looking for a tool which can graph different traffic types flowing > off the same Switch port. Currently I am using the SPAN port with > Ethereal, but it has some issues.
I'm afraid that will be the best you will be able to gather. > Does any one of you know of a tool for out-of-band (should not affect the > traffic flowing over the monitored port) monitoring of different TCP > traffic over a LAN switch, preferably using SNMP counters. I want one > second granularity. > > I have a Cisco 2970 L3 switch and it does not support NetFlow. 2970 is a L2 switch. None of the 35xx or 375x line support netflow with IOS 12.2SE - a real bummer, since the 3550 used to support it... But netflow will not give you 1-second granularity - it only reports when the flow ends. So a sniffer is really your best tool. If you are having trouble with SPAN, then get a splitter from CenturyTap. But nothing else will give you anything like the granularity you are looking for. You might have to go back and do a manual analysis of the trace (Sniffer Pro from Network Associates does a better job of back-end analysis than Ethereal, but the cost/benefit ratio might not be there)... -- Daniel J McDonald, CCIE # 2495, CNX, CISSP # 78281 Austin Energy [EMAIL PROTECTED] -- Unsubscribe mailto:[EMAIL PROTECTED] Archive http://lists.ee.ethz.ch/mrtg FAQ http://faq.mrtg.org Homepage http://www.mrtg.org WebAdmin http://lists.ee.ethz.ch/lsg2.cgi
