Gert Doering <g...@greenie.muc.de> wrote:
> I've been writing a document explaining inside/outside fragmentation in
> an OpenVPN context, explaining my points with "tcpdump", like this:
> $ tcpdump -vv -i any host ... or host ...
...
> What is very obvious here is that for IPv4, there is a clear indication
> on the IPv4 packet length (in the first line printed per-packet) and
> also the payload length (in the second line).
> For IPv6, there is just one line, and no overall IPv6 packet length
> printed whatsoever - and also, "just one line per packet", not the
> two-line format.
Note also that you are comparing the ICMPv6 printer vs the UDP printer.
If anything, I'd want to fix the UDP printer to not use multiple lines,
because it breaks people who are trying to grep.
Many people use regex in an editor to show only the lines they care about.
The -vv probably changes this too.
--
] Never tell me the odds! | ipv6 mesh networks [
] Michael Richardson, Sandelman Software Works | IoT architect [
] m...@sandelman.ca http://www.sandelman.ca/ | ruby on rails [
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