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Re: question concerning traceroute?
- From: alex
- Date: Thu Oct 17 11:18:04 2002
> > > > > According to definition, is should take the same path, but are there any
> > > > > other cases that I should be aware of?
> > > >
> > > > According to the definition, it is going to show you the path the packets
> > > > took from you to the destination, not from the destination back.
> > > >
> > >
> > > Unless you did "- g",
> > Not correct. -g specifies loose source routing on the way *there*, not back.
> I think the intention was to indicate that you can
> traceroute -g <remote-router-before-host> <your-local-ip>
> to get the path to and back. -g requires an argument obviously.
That, obviously, is correct.
However, the remote ip in this case is your local IP, so you are
still getting a path to the destination.
Even more importantly, LSR relies on every router on a forward path
between <your-local-ip> and <remote-router-before-host> allowing LSR, which
is an invalid assumption.