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-rw-r--r--contrib/tcpdump/tcpdump.17
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;
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