** Changed in: linux (Ubuntu)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1736593
Title:
ThunderX: TX failure unless checksum offload disabled
Status in linux package in Ubuntu:
Fix Released
Status in linux source package in Artful:
Fix Released
Bug description:
[Impact]
Most attempts to use IPv6 on the ThunderX NIC will fail.
[Test Case]
Attempt an IPv6 TCP connection:
$ wget -6 'http://www.kernel.org/'
The connection will time out.
[Regression Risk]
The fix is upstream, and is limited to the ThunderX nicvf driver.
[Workaround]
Disable TX checksum offload:
$ ethtool -K eth0 tx off
[More Details]
The issue first appears in Linux 4.12. A fix from Cavium has been merged
upstream:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/drivers/net/ethernet/cavium/thunder/nicvf_queues.c?id=fa6d7cb5d76cf0467c61420fc9238045aedfd379
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