First for all the people who answered to me, THANKS! I'm going to try to explain a little more detailed my LAN structure: We got about 150 PCs (W98 based), 3 NT-server (for file archiving proposal), 2 HP-D9000 with the big programs of the company, and one very-optimized-PC with RH 6.2 where are installing and preparing our web server. We got three rack-box where there's (in every one): -one 3COM 3300 switcher with 1 I/O fibber module (the fibber connects the switcher belong them) -3 3COM 1100 hubs for connecting the PC of every floor. In the Computing Department (where I work) we got 8 PC attached to a 3COM switcher. All the LAN is designed to work properly at 10 Mbps. We got a RDSI router that is "calling" to a server proxy in another city. In other places, and less important we got several small (8/16 ports) hubs. We are watching since some time that the speed of traffic is going down a lot (for example, transmitting a 50 MB file between the NT server and the hosts, it takes almost one minute, before, 6-7 seconds). I've just tried to install ethereal, but it asks libpcap library, and I'M SURE I've downloaded it and "./configure + make + make install" properly, but I don't know what happes that ethereal can't see it. Alternativaly I've installed etherape, and this is working fine, although I don't understand something: in the screen apears the IP of the machines that are on, and sometimes there's a line that goes from one of them to the IP of the NT-server (fine!). From one computer that it's browsing in Internet, I also can see a big line between it and the IP of the router (also fine!), but there are some mac-address placed in the screen that aren't associated with any IP. Are those the mac-address of the routers/switchers??? How can I measure the speed of the segment between one router/switcher in a rack-box and another h/sw in another rack-box using software in Linux? Possible? How can I get access from Linux to the config menu of the h/sw? I believe this is a long ask, but I believe it's instereting because it touchs a lot of topic in the newbie training in LAN administration. Anyway, thanks in advance!! _________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. Share information about yourself, create your own public profile at http://profiles.msn.com. - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org
