[c-nsp] Strange OSPF Situation

[Dan Armstrong]

I'm trying to do something a bit weird with OSPF, and I found something 
that works - I'm interested in people's opinions of why or why I 
shouldn't do this.


I have 6 routers, all in a row, all in the same VLAN.


R1--RA--RB--RC--RD--R2

For reasons that are too silly to explain, I want RA, RB, RC, & RD to 
neighbour with R1 & R2, and each other, but I don't want R1 to neighbour 
with R2 (and vice versa).

On R1 & R2, under the ethernet interface, I use the command:

ip ospf network point-to-multipoint non-broadcast



and on RA, RB, RC, and RD I use:

ip ospf network point-to-multipoint broadcast


I don't have to put in neighbor statements, RA, RB, RC and RD 
automatically neighbour with each other and R1 and R2.  R1 and R2 don't 
neighbour with each other. 
I get exactly the behavior I want.. but it seems a bit strange and non 
standard.

Can anybody think of a reason I shouldn't do this?