Routes appear magically

[Mike Muuss]

The H flag means "route to host".  I assume that there was also a
D flag?  (Dynamic route?).  If so, the route was established via
an ICMP-Redirect-Host message.  Presumably the redirect was sent
by your default gateway, advising your machine to use some other
gateway.  This may be a stedy-state condition (ie, the default
gateway always will say that), or it may be a byproduct of route
fluctuations between your several gateway machines.

This is generally considered normal.
	Best,
	 -Mike