I understand your point, but our primary reason for having a backup line is
in case the main circuit goes down, not in case the actual router goes down.
I was attempting to figure out a way to do poor-man's HSRP. For DSL, we'll
be using a Cisco 675 which can't do HSRP.
Thanks,
John
> On Tue, 29 Aug 2000, John Neiberger wrote:
>
> > We have a situation where ICMP redirects might be very helpful, but I
have a
> > practical question about them. In our situation, we'll have two
routers
> > connected to a switch, the first having a T-1 connection, the second
being a
> > backup router with DSL. All PCs will have the main router as their
default
> > gateway. If the main circuit goes down, that router should send ICMP
> > redirects to the PCs to divert traffic to the other router, right?
>
> no. icmp redirects don't work like "hey he is down, send it to
> me"........instead they work like "don't send it to me, so and so is a
> better route". In other words they originate from your next-hop and
point
> to a better hop. If your next-hop is down, then its not going to be
> originating much of anything is it?
>
> HSRP is what you want/need to use here. That is the best way to acomplish
> this.
>
> >
> > If that's the case, how do the hosts know when the main circuit comes
back
> > up? I don't see how there would be any way for them to know to resume
> > sending traffic to the original default gateway. The way I see it,
when the
>
> With HSRP this can be accomplished using preempt
>
> > main line goes down the hosts would start to use the DSL route, and
would
> > continue to use that route even after the main route becomes available.
> >
> > any thoughts?
> >
> > TIA,
> > John
> >
> >
> >
> >
> >
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>
> -----------------------------------------------
> Brian Feeny, CCNA, CCDA [EMAIL PROTECTED]
> Network Administrator
> ShreveNet Inc. (ASN 11881)
>
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