Dear fellas I need some help on this pls
I have a CE connected to my PE via two leased lines of equal BW and costs for load balancing and sharing. OSPF is running b/w the two in area 2020 such that the two Leased lines are treated as seperate paths and neighbourship establishes on both against the ruter ID which is the Lo0 int.
The issue is that if I configure the network b/w the PE and CE as NSSA then ospf only shows one path to routes learned from each other.
If nssa command is removed then both paths are seen for the routes and traffic is load balanced.
I apologise for my ill-letracy.
when you set area type to NSSA the following happens:
node CE becomes an NSSA ASBR and generates LSA type 7 that are confined to the NSSA area ( area scope)
node PE becomes an NSSA ABR that performs LSA translation from type 7 to type 5 according to the rules described in OSPF NSSA RFC
if you remove the NSSA option area 2020 becomes a standard area, CE node a standard ASBR that generates LSA type 5 diretly, PE node becomes a standard ABR and the type 5 LSA is flooded unchanged in the OSPF domain
In adddition to this using 0.0.0.0 wildcard has specific effects on the forwarding address field
you can try the following:
use network command + passive interface instead of redistribute connected
change wildcard mask to 0.0.0.3 aligned to subnet mask in network commands describing p2p links CE-PE
Hope to help