On Tue, Jul 28, 2009 at 05:00:22AM -0400, Christopher Morrow wrote: > it's 10 years old, from a single network link, in what I suspect was > VBNS+, so not even today's internet (scale or applications or users or > traffic levels or uses)
People might want to check "netstat -s" - on some OSes it displays the number of datagrams with no checksum. From some machines I have access to: Datagrams with no csum Fraction 1643918434 1660 ~0.000001 1780472220 233156 ~0.00001 1335609090 918129 ~0.0007 4157989 931 ~0.0002 122783361 43532 ~0.0004 The second machine is a moderately busy DNS server. The third a public NTP server. I don't think the counters have wrapped - I get plausible looking pps numbers if I divide the datagrams by uptime. Checking some other traces, I see about 21420/17253070 NTP packets with no checksum. Of non-NTP, non-DNS traffic I see about half a percent of UDP with no checksums. A lot of this looks like either port scans or people trying to use obsolete services like port 37. David. -------------------------------------------------------------------- IETF IPv6 working group mailing list ipv6@ietf.org Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------