Nope, all one subnet. i.e all interfaces are on the 10.1.X.X/16 subnet
Hence the problem.
Im well aware this is the normal partial mesh behavior and that its quiet
easily rectified using map statements... but for this particular setup it
requests the use of routing and not frame relay map statements.
At 06:26 PM 26/11/2000 -1000, Frank B. wrote:
>Unless I'm mis-reading you here this is the correct behavior for a
>partial mesh. Unless you provide a full mesh you won't get dynamic
>mappings for both spokes. Also, I assume the PVC from R1 to R2 is one
>subnet and the PVC from R1 to R3 is another subnet--Frame relay and
>Inverse ARP alone can't route between them.
>
>So if you can't get a PVC between R2 and R3...then run any routing
>protocol on all 3 routers and you should be able to ping from R2 to R3
>and vice-versa (RIP will work fine to prove this point.) Hope this
>helps...and as always, comments are welcome ( and in fact expected
>;-) Frank
>
>James Wilson wrote:
> >
> > 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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