Re: [j-nsp] Question on creating a custom RIB

From: Jeff Harrington (jharring@nysernet.org)
Date: Thu Aug 23 2001 - 13:24:36 EDT


Dave,
         I had tried the advertise-inactive knob, with no affect (Juniper
told me it won't if the routes aren't in the active table).

But thanks,
Jeff

At 12:29 PM 8/23/2001 -0400, Dave Curado wrote:
>Sounds interesting.
>Have you checked out the "advertise-inactive" knob?
>
>Even then, when their packets make it to your router,
>it will do it's job and look up the best path for that
>packet. If the best path is via Abilene, then off it
>will go.
>
>Filter based forwarding can do what you're describing.
>i.e. take all the traffic that comes in interface xyz
>and forward it using a different forwarding table.
>
>There is a technology note on filter based forwarding
>at: http://www.juniper.net/techcenter/notes/552003.html
>
>Hope this helps,
>Dave Curado
>/* disclaimer: I work for Juniper */
>
>
>
>On Thu, Aug 23, 2001 at 09:45:46AM -0400, Jeff Harrington wrote:
> > All,
> > I'm trying to do a workaround on my network to get non-active BGP
> > routes (I'll explain why) to one of my customers. CCC doesn't look
> like it
> > will work, so I'm looking to create a new RIB in the hope I can do
> > this. I'm looking for any information from people who may have tried this
> > - I would rather not play on a production network if I don't have to.
> >
> > I have a M20 with multiple peers and customers connected to it. One of my
> > peers is my preferred route, and the second is an ATM PVC that is a backup
> > for most of my customers. A new customer was recently connected that
> > cannot connect to my primary transit provider, so I need to get the routes
> > from the secondary to them. We have the secondary set up with a
> local-pref
> > of 10, and would prefer to keep it that way if at all possible -
> > unfortunitely this keeps the routes from that provider from being
> placed in
> > the active table, so they don't get readvertised. The new customer (and
> > others soon to be connected with the same situation) are all POS
> OC3. I've
> > seen that you can only do CCC between like interfaces so I can't do that
> > between the ATM peer and the POS customers (please correct me if I'm wrong)
> >
> > What I would like to do is send the routes from the backup peer to a new
> > RIB and export that to this customer. The customers that would need this
> > would be the only people seeing this routing table, so it hopefully won't
> > break my normal routing. Looking at the Juniper web page, I got the
> > documentation for creating a new routing table, and some documentation on
> > an option for bgp-rib, but it wasn't terribly helpful.
> >
> > We could also do a tunnel for this, but I am looking to avoid that if I
> can.
> >
> > (In case anyone is wondering why I can't connect these customers up
> > normally, the main provider I have is Abilene, and that is a difficult
> > provider to connect to in some cases. The second provider is vBNS, which
> > is less restrictive)
> >
> > Thanks in advance for any help people can provide.
> >
> > Jeff
> >
> >
> > Jeff Harrington Network Engineer
> > NYSERNet 100 Elwood Davis Road
> > 315.413.0345 x5858 jharring@nysernet.org
> >
>
>--
>
>"The black holes in the centers of the galaxies will slowly travel on
> their own, sucking mass and energy from universes wherever they contact
> other objects. If it's another black hole that they randomly impact,
> then they simply merge, to become an even larger devourer. A few hours
> after coming within range of one of these, Earth and any distant
> descendants on it will be taken out of existence."
> -- excerpt from E=mc^2 by David Bodanis
>
>Have a nice day.



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