The speed of tg depends heavily on a number of factors, the most important of wich are the CPU speed, the network card architecture (transfer type, number of interrupts...) and the NIC driver. My experience is that on the same machine results vary a lot with the card model, and sometimes just upgrading drivers is useful. Other considerations: - it's a lot faster to get high bandwidth with big packets, because this means less software processing, less interrupts and better PCI bandwidth usage. If you're just interested in bandwidth and not in frame rate, use big packets and you'll see better results. - If you're using a reasonably new machine and network card, 132 Mbits is quite low. However, do not hope to go over 250-300 Mbps with a standard architecture like WinPcap, at least with small packets. If you want to do better, use hardcore stuff like linux pktgen.
Loris > -----Original Message----- > From: Juim [mailto:[EMAIL PROTECTED] > Sent: Tuesday, December 07, 2004 9:08 AM > To: [EMAIL PROTECTED] > Subject: [WinPcap-users] GigE Traffic Generator > > Hello, > > Ive been playing around with the tg (traffic > generator) sample program included in the newest release > version (3.0). On a pair of 100 Mbits Ethernet NICs, > connected via a cross over cable, I can achieve around 67 > Mbits/sec - close to the real world maximum. > However, on a pair of GigE NICs (connected via a cross over > cable) I can only achieve around 132 Mbits/sec. > Is there something Im missing? Id like to generate traffic > as close to gigabit speeds as I can. Any suggestions? Thanks > for any help. > > > > __________________________________ > Do you Yahoo!? > Yahoo! Mail - Find what you need with new enhanced search. > http://info.mail.yahoo.com/mail_250 > > > ================================================================== > This is the WinPcap users list. It is archived at > http://www.mail-archive.com/[email protected]/ > > To unsubscribe use > mailto: [EMAIL PROTECTED] > ================================================================== > ================================================================= This is the WinPcap users list. It is archived at http://www.mail-archive.com/[email protected]/ To unsubscribe use mailto: [EMAIL PROTECTED] =================================================================
