On 08/13/2010 01:34 PM, Steve Chen wrote:

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The TAHI correspondent node tests CN-6-4-1 (Processing in upper layer
- Echo Checksum) failed for me in the 2.6.32 kernel.  It appears that
the Linux kernel is replying the ICMP echo request in
icmpv6_echo_reply without much checking.  Is this an intentional
non-conformance to RFC3775 section 9.3.1?

[snip]

It appears that skb->ip_summed is always 1 (CHECKSUM_UNNECESSARY).
I'm using e1000e.  Looking at the driver, there is a checksum offload
hardware.  I think the code is doing frame check on the entire
Ethernet packet.  Since no error was found, it assume everything
inside is correct.

# ethtool -K ethX rx off

Does that help?  Does using a different NIC help?

-Brian