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| author | obrien <obrien@FreeBSD.org> | 2006-06-20 05:04:05 +0000 |
|---|---|---|
| committer | obrien <obrien@FreeBSD.org> | 2006-06-20 05:04:05 +0000 |
| commit | 705134c2402fe70dfea7875710ead4d92b971ec2 (patch) | |
| tree | e8c3474b2c9d3d81b9174ea3ac673727bbdcc2b8 /contrib/tcpdump | |
| parent | 33e3c668d4a181de9120ba3c7f7f23f32c419e77 (diff) | |
| download | FreeBSD-src-705134c2402fe70dfea7875710ead4d92b971ec2.zip FreeBSD-src-705134c2402fe70dfea7875710ead4d92b971ec2.tar.gz | |
Document that 'bad cksum 0' is expected on NICs with checksum off-loading.
Diffstat (limited to 'contrib/tcpdump')
| -rw-r--r-- | contrib/tcpdump/tcpdump.1 | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/contrib/tcpdump/tcpdump.1 b/contrib/tcpdump/tcpdump.1 index 5a009ac..3d5bdbd 100644 --- a/contrib/tcpdump/tcpdump.1 +++ b/contrib/tcpdump/tcpdump.1 @@ -2257,6 +2257,13 @@ patches@tcpdump.org NIT doesn't let you watch your own outbound traffic, BPF will. We recommend that you use the latter. .LP +When running +.BR tcpdump +with the +.B \-v +option on a network interface supporting checksum off-loading, +IP packets sourced from this machine will have many false 'bad cksum 0' errors. +.LP On Linux systems with 2.0[.x] kernels: .IP packets on the loopback device will be seen twice; |
