[Bug 1251464] Re: Bad TCP/UDP checksum on e1000e with tx-checksumming on
Apparently bad checksums in tcpdump/wireshark captures for outgoing traffic are normal, when hardware offload is enabled. The NIC only fills in the correct value after data has been copied to the NIC, which is after capture takes a snapshot of the buffer with whatever garbage was there. See the last point in http://docs.gz.ro/node/282. Since disabling chksum offload actually fixed your problem, maybe your NIC really was filling in checksums incorrectly (or it wasn't really enabled, so neither the kernel nor the NIC were generating correct checksums). Anyway, I think to properly debug this, you should have tried capturing packets from a different computer, so you can be sure you're seeing what went out over the wire with/without HW chksum enabled. TL:DR: you probably had a real issue (since disabling offload got your ssh working), but your debugging / verification technique was flawed, and would show a problem even on working hardware. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1251464 Title: Bad TCP/UDP checksum on e1000e with tx-checksumming on To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-lts-trusty/+bug/1251464/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1251464] Re: Bad TCP/UDP checksum on e1000e with tx-checksumming on
Benjamin Franz, the Quantal enablement kernel is EoL as per https://wiki.ubuntu.com/Kernel/LTSEnablementStack . Could you please test the Trusty enablement kernel and advise to the results? ** Package changed: linux-lts-quantal (Ubuntu) = linux-lts-trusty (Ubuntu) ** Changed in: linux-lts-trusty (Ubuntu) Importance: Undecided = Low ** Changed in: linux-lts-trusty (Ubuntu) Status: New = Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1251464 Title: Bad TCP/UDP checksum on e1000e with tx-checksumming on To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-lts-trusty/+bug/1251464/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1251464] Re: Bad TCP/UDP checksum on e1000e with tx-checksumming on
** Tags added: quantal raring -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1251464 Title: Bad TCP/UDP checksum on e1000e with tx-checksumming on To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-lts-quantal/+bug/1251464/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1251464] Re: Bad TCP/UDP checksum on e1000e with tx-checksumming on
related to https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=652739 ** Bug watch added: Debian Bug tracker #652739 http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=652739 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1251464 Title: Bad TCP/UDP checksum on e1000e with tx-checksumming on To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-lts-quantal/+bug/1251464/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1251464] Re: Bad TCP/UDP checksum on e1000e with tx-checksumming on
related to bug 1029430 and https://bugs.debian.org/cgi- bin/bugreport.cgi?bug=652739 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1251464 Title: Bad TCP/UDP checksum on e1000e with tx-checksumming on To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-lts-quantal/+bug/1251464/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
