How can we make following changes as -- Nagle = off and TCPNODelay = 1 On Mon, Jun 14, 2010 at 11:39 PM, Fischer, Anna <anna.fischer@xxxxxx> wrote: >> Subject: RE: ip_conntrack fails to track Windows Vista TCP connection >> >> >> On Monday 2010-06-14 19:34, Fischer, Anna wrote: >> >> >>>> [something about Vista and TCP Delayed ACK] >> >>>> >> >>>> Is this a known issue? >> >>> >> >>> You're mentioning ip_conntrack, which is obsoleted for multiple >> >>> years now. Which kernel version are you using? >> >> >> >> By definition of ip_conntrack, that must be older than 2.6.20. >> > >> >Yes, this is a 2.6.18 Xen kernel that I am using. Even if it is >> obsolete, can you let me know if you are aware of such a problem ever >> having caused any issues? I just want to get a feeling if I am at least >> roughly on the right track while figuring out what the problem is. >> >> The 2.6.18 has a known problem with DSACK even when both >> endpoints are Linux. > > My problem is really very specific to connection tracking and so the problem (bug?) is probably in the ip_conntrack_tcp module. TCP communication actually works fine, also connection tracking on (slow, non-bulk data) TCP traffic works. However, it fails with high throughput connections coming from newer Windows (Vista / 7) machines. If I switch those to TCP_NODELAY then it all works again. > -- > To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
