I call packet reordered if instead of expected packet with sequential number N I am getting packet < N. If I receive packet > N then missing packets are considered as lost. I.e. "reordered" is a packet that arrived later than it was expected. That happens between two boxes connected through crossover cable - no routers, no switches. Each box has one NIC 3COM 3C920 Integrated Fast Ethernet Controller (3C905C TX compatible). No another CPU consuming application is running.
I guess it all happens in NDIS layer. The question is: should something else to be done before calling NdisSend to force NDIS to keep original order? Packet flags? OOB data? May NDIS do something funny to loopback that causes reordering? ----------------------------- I have another question as well. If I use big buffered send size (>4 megabytes), NPF_Read returns approximately 5-10% of packets twice (by whole blocks). Regards Igor -----Original Message----- From: Gianluca Varenni [mailto:[EMAIL PROTECTED]] Sent: Tuesday, October 01, 2002 11:30 AM To: [EMAIL PROTECTED] Subject: Re: [WinPcap-users] Packets reordering with latest npf.sys What do you mean by "reorder"? GV ----- Original Message ----- From: "Igor Taranov" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Tuesday, October 01, 2002 4:36 AM Subject: [WinPcap-users] Packets reordering with latest npf.sys > I am using winpcap npf.sys for UDP traffic generator application. The > problem that I have: outgoing traffic is reordered. I see it with my > receiver and with sniffer as well. At 40 Mbits reordering is about 5-8%, > than at >70 Mbits it goes to 90% and higher. Any suggestions how to avoid > reordering using npf.sys? > > Thanks in advance > Igor > > > > ================================================================== > This is the WinPcap users list. It is archived at > http://www.mail-archive.com/[email protected]/ > > To unsubscribe use > mailto: [EMAIL PROTECTED]?body=unsubscribe > ================================================================== > ================================================================== This is the WinPcap users list. It is archived at http://www.mail-archive.com/[email protected]/ To unsubscribe use mailto: [EMAIL PROTECTED]?body=unsubscribe ================================================================== ================================================================== This is the WinPcap users list. It is archived at http://www.mail-archive.com/[email protected]/ To unsubscribe use mailto: [EMAIL PROTECTED]?body=unsubscribe ==================================================================
