Re: Simple question

Thus spake "Ali Boudani" <aboudani(_at_)irisa(_dot_)fr>
> If we have the following figure:
>
> R1---------R2---------R3---------R4 where R1 to R4 are unicast routers.
> R1 is sending packets to R4. If R4 goes down, when R1 will detect this??
> Before sending packets or after?
Your question presupposes that R1 is somehow aware of R4.  If you can answer
how that is, you will know if/when R1 will detect a subsequent failure.

S