From: ZEESHAN SANAULLAH (zeeshan_dreamcatcher@hotmail.com)
Date: Fri Nov 21 2008 - 07:58:42 ARST
i forgot to mention that inverse arp is disabled to for the DLCIs between
spokes.
> Date: Fri, 21 Nov 2008 14:05:04 +0500
> From: fahad.khan@gmail.com
> To: zeeshan_dreamcatcher@hotmail.com
> Subject: Re: Frame-Relay dlci Confusion
> CC: ccielab@groupstudy.com; narbikk@gmail.com
>
> Dear Zeeshan,
>
> First of all, If I disable inverse-arp on R1 and R2, how will I be able to
> learn DLCIs dynamically?
>
> Case 1: If the topology is full mesh, means there is a direct connection
> (PVC) between R1 and R2, In this case "show frame-relay pvc" will provide
> the information of two PVCs (active) on each router.
>
> Case 2: If R1 can only get to R2 via R3 (Hub) ,then on R1 and R2 , you
will
> get only one PVC info (towards R3) by "sh fram pvc".
>
> Note: In both cases, you may found "Inactive" PVCs (got from FR switch)
> whose mappings (DLCI-IP) are not defined.
>
> HTH
>
>
> On 11/21/08, ZEESHAN SANAULLAH <zeeshan_dreamcatcher@hotmail.com> wrote:
> >
> > Hello GS !!!!
> >
> > I am a little confused in this basic thing regarding frame-relay dlci.
> >
> > Lets take 3 routers R1,R2,R3
> >
> > R3 is the HUB and R1 and R2 are spokes
> >
> > The Frame-Relay switch is configured in a full mesh configuration.
> >
> > But the task asks to configure the routers in Hub and Spoke manner.
> >
> > R1 , R2 and R3 must have ip 10.1.1.1/24 and 10.1.1.2/24 and 10.1.1.3/24
> > respectively.
> >
> > Disable inverse-arp on R1 and R2 so that they only learn dynamic mapping
to
> > R3
> >
> > All config is to be done on Main interfaces.
> >
> > Now the confusion is that ... when all configs are done correctly.
> >
> > what must be the output of show frame-relay pvc command.
> >
> > i mean R1 and R2 must have learned two dlci.
> >
> > The one to R3 must be active........
> >
> > what about the other ???? the one between R1 and R2.
> >
> > What i get in Lab is some times it is unused but active and sometimes
used
> > and
> > active as well.
> >
> > any idea ??
> >
> > Regards
> > Zeeshan
> >
> >
> >
> >
> >
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> Fahad Khan
> http://fahad-internetworker.blogspot.com
>
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