From: Ben (bmunyao@gmail.com)
Date: Wed Aug 01 2007 - 09:29:42 ART
Hi Theo,
Thank you for your comments. Sorry if my original post wasn't clear. The
topology is as follows:
10.1.12.0/24
R1---------------------R2 (no FR switch between the routers)
The Question: The requirement is for automatic L3 to L2 mapping without
inverse ARP or PPPoFR. No DLCI given.
From your comments, I gather the following:
1. LMI is for PVC announcements and monitoring their status, between the FR
switch (DCE) and the local DTE.
2. InverseARP is end to end between DTEs, for L2 to L3 resolution.
Option 1 in original post qualifies as hybrid by your definitions, since
frame-relay switching is enabled on R2.
You are right, enabling FR switching on R2 only introduces LMI, and has
nothing to do with InverseARP. Then it appears both solutions are valid,
with the only difference being that option 1 dynamically monitors PVC
status. Comments?
Thanks
Ben
On 8/1/07, Theo M <theorack@gmail.com> wrote:
>
> Some points:
>
> F.-R. Back-to-Back: (no LMI) <-> (no LMI)
> F.-R. Hybrid: (no LMI) <-> (LMI)
> F.-R. Usual: (LMI)<->(FR_Switch)<->(LMI)
>
> You CAN do InverseARP without LMI, try it on a Back-to-Back F.-R.
> connection.
>
> LMI is about learning what PVCs are available on the FRswitch and their
> state.
>
> InverseARP is about dynamic L3->L2 resolution, over an already known PVC.
>
> Dynamic resolution and static resolution are forbidden, you are left w/
> p-t-p subinterfaces: they don't need resolution, maybe this is your
> "automatic".
>
> Please re-state your full requirement and topology.
>
> --
>
>
> On 7/31/07, Ben < bmunyao@gmail.com> wrote:
> >
> > Hi
> >
> > The requirement is for automatic L3 to L2 mapping without inverse ARP or
> > PPPoFR.
> >
> > AFAIK there are two ways to implement this:
> >
> > Option 1
> > -------------------------------
> > R1 (dce cable side)
> > fram switching
> > int s0/0
> > enca fram
> > clock rate 64000
> > fram intf-type dce
> > int s0/0.1 po
> > ip add 10.1.12.1 255.255.255.0
> > fram int 100
> >
> > R2 (dte cable side)
> > int s0/0
> > enca fram
> > int s0/0.1 po
> > ip add 10.1.12.2 255.255.255.0
> > fram int 100
> >
> > Option 2
> > ---------------------
> >
> > R1
> > int s0/0
> > enca fram
> > no keepalive
> > clock rate 64000
> > int s0/0.1 po
> > ip add 10.1.12.1 255.255.255.0
> > fram int 100
> >
> > R2
> > int s0/0
> > enca fram
> > no keepalive
> > int s0/0.1 po
> > ip add 10.1.12.2 255.255.255.0
> > fram int 100
> >
> > Do both of the above meet the requirement, or have I missed something?
> >
> > I wasn't sure about option 1 since we are enabling LMI. Any comments are
> >
> > welcome.
> >
> > TIA
> > Ben
> >
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