[j-nsp] Junos OSPF Inter-Area Routes !

[vaibhava varma]

Dear All

Recently I was working on a scenario in OSPF for checking  the use of
Backbone Area 0 for Inter-Area communication and I was surprised to
see that 2 Non-Backbone areas were able to exchange inter-area routes
without any Area 0 configured. Well the same thing did not work in
Cisco which was the expected behavior per documentations.

Topology was simple

R1-Area3-R2-Area2-R1

Can anyone help to understand the above behavior in Junos.
-- 
Regards
Varma