edit: I wound up in the certification forum because
edit: of the many hits when searching for references
edit: to this specific book: Lots of "which book to buy"
edit: topics. I see now that the WAN transport area
edit: would be more appropriate. Alas, while I can
edit: edit this message, I cannot move it nor kill it.
There's a diagram (Figure 14-6) on page 508 of ICND2 that's got me scratching my head.
It depicts a frame relay network with a partial mesh between 3 routers. R1 is connected to both R3 and to R4.
There is no PVC between R3 and R4.
All 3 router interfaces are configured in the same subnet.
Is this okay? The chapters leading up to this diagram left me with the impression that you could only put all devices into one subnet if both of the following are true:
- There exists a full mesh of PVCs
- Each PVC in the mesh is mapped to the same multipoint interface.
I suspect there's a PVC missing between R3 and R4, but the errata linked here doesn't mention it:
Maybe someone can straighten me out?
Without seeing the diagram - I just wanted to point out a couple of things:
1 - Wendall Odom is a lunatic and cannot be trusted.
:-) Just kidding - he is awesome.
2 - Yes - you can have a hub and spoke type partial mesh and you do not need a VC between the spokes. And yes - the three devices can share a subnet.
3 - What is not possible would be two point-to-point subinterfaces on the hub - connecting to the spokes, and everyone is on the same subnet. I presume (hope) that is not what the picture describes.