FAQ: Mention plotnetcfg tool.

The plotnetcfg is an open source tool to visualy represent relationship between network interfaces on a single host. It helps to understand the path of a packet on a host. Signed-off-by: Flavio Leitner <[email protected]> Signed-off-by: Ben Pfaff <[email protected]>
ViKingIX · Sep 4, 2015 · 8e3cdf3 · 8e3cdf3
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@@ -1623,6 +1623,9 @@ A: To debug network behavior problems, trace the path of a packet,
    that's correct, then trace the path of the response packet back to
    the origin.
 
+   The open source tool called "plotnetcfg" can help to understand the
+   relationship between the networking devices on a single host.
+
    Usually a simple ICMP echo request and reply ("ping") packet is
    good enough.  Start by initiating an ongoing "ping" from the origin
    host to a remote host.  If you are tracking down a connectivity