Hi Folks,
First of all , I�d like to thank you guys who are giving me support to solve this problem. Let me give you some information : 1-About almost a month ago , we had problems with Nimda virus ( we had the Norton Anti-virus but not updated ). So the performance of our network was terrible and we solved it the next day. 2-But we discovered that some users didn�t have NAV in their windows 95 boxes. They simply deleted it, saying that it slowed down the machine. 3- So I suspect that : - we have many desktops without NAV - they are infected with Virus ( nimda and stuff like that ) thus impacting in the overall traffic 4- My topology is quite simple: we have a L3 Nortel Switch Accelar 1100 and each port is a IP Vlan , so we have 16 vlan , in other words, 16 segments.But 1 vlan is for the servers which is the main target of the desktops.The Pc desktops don�t have interest into exchanging information among them. Their main purpose is to access the servers vlan. 5- At first I put a analyzer ( Domino Lan from WWG ) between the nortel switch and the L2 Switch , a " man in the middle " topology , and the utilization of each segment was nothing more than 30%, in the worst cases. 6- so I�d like sniff the segment itself to see if there is something "strange" ( a virus , internet sharing , in other words, what�s is causing the L3 to run out of CPU ) congestioning the L2 switches, do you know what I mean ? I hope that theses information have cleared some doubts... thx, Jacques -----Mensagem original----- De: Pradeep Kumar [mailto:[EMAIL PROTECTED]] Enviada em: segunda-feira, 29 de outubro de 2001 13:48 Para: Jacques Chicourel Nunes Vaz - BA; [EMAIL PROTECTED] Assunto: RE: Packet Sniffing in a Switched LAN My question to you is - what are you going to do with the sniffed traffic.Are you clear on what you want to "read off ". Sniffing tools are used for troubleshooting. What is your purpose ? -----Original Message----- From: Jacques Chicourel Nunes Vaz - BA [mailto:[EMAIL PROTECTED]] Sent: Thursday, October 25, 2001 10:33 AM To: '[EMAIL PROTECTED]' Subject: Packet Sniffing in a Switched LAN Hi folks, I have a Lan with 200 desktops and I�d like to sniff it. What tool can I use to see all the packets ( going and coming ) ? Any suggestions ? Regards, Jacques
