If you could post the configs it would help, but here's some ideas to try.
Are you sure have inverse ARP working?
Have you tried a static route to R3 (from R2) gatewayed to R1's IP and the
same on R3 to R2 via R1's IP?
Look into Proxy ARP.
Just a thought, I've never tried this but, is there a way to make a static
ARP entry?
Rodgers Moore
"James Wilson" <[EMAIL PROTECTED]> wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> Hi All,
>
> I hope someone can shed some light on the problem I have come across in
the
> following scenario :
>
> Three routers, R1,R2 and R3 all connected via a Frame Relay cloud with a
> router in the middle doing frame relay switching. The frame switch is
_not_
> fully meshed. R1 is acting as the hub with R2 and R3 being spokes off R1.
> Hence there is a PVC betweenR1 and R2 and a PVC between R1 and R3. There
is
> _no_ PVC between R2 and R3.
>
> The particular lab exercise here specifies that each router much be able
to
> ping every other router in the frame cloud. BUT the use of the
'frame-relay
> map' command is forbidden, and only R1 can be configured using a
subinterface.
>
> As I have it configured R1 can ping both R2 and R3 as expected. However,
> both R2 and R3 can only ping R1 (the hub) yet cannot ping each other. The
> question stipulates you should use routing and not Layer2 to Layer3
> mapping. A debug on the ping from R2 to R3 shows that there is no map
entry
> for R3 hence encapsulation failed. A look at 'sh frame map' shows there is
> only 1 entry and it is for R1. This sh frame map is identical on R2 and
R3.
>
> So the question is, how can I get R2 and R3 to be able to ping each other
> using routing and not the frame relay map command.
>
> It's got two of us here studying for our CCIE stumped, so im hoping
someone
> out there has an idea as to how this can be accomplished.
>
> Also, as this is for the CCIE, static routes are not an option.
>
> Cheers.
>
> Jim.
>
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