I have a Hub - Spoke scenarion...Like..
Datacenter located at Mumbai having primary Rel with BGP and secondary Tata with static routing.(Both Rel and tata MPLS Connectivity).
Branches are spreads all over india having same primary Rel and secondary Tata with both static routing.If Rel goes down I manually change staic routing for Tata.
For avoding manual intervention i want to configure OSPF.For that i want some input....
1) What i have to configure at Mumbai Datacenter.
2) Branch end configuration
3)What is service provider role in this?
4) Presently we are using 2800 series router at both Mumbai and Branches.Is it sustain?
Any help is highly appreciated...Pls find the attached net diag..
Frist of all you need to decide that what Dynamic routing protocol you will use.
Accourding to me...
1] Fro REL you shoud use BGP for all location & HO.
2] For TATA you should use OSPF for all location & HO.
3] For TATA you should use BGP for all location & HO
It is not possible to use HO to TATA as BGP & All TATA location OSPF. Because SP won't agree with this kind of services.
Case1] If you are using BGP for Both SP then you should use Weight (BGP Att ) for route selection.
Case2] If you are using OSPF for TATA & BGP for REL then AD will take care for route Selection.
If at branch Rel link down, branch traffic will automatically shifted to tata over OSPF.but what about return traffic?
at HO due to both the links up, which path it will take? Rel or Tata?
Here If your REL link goes down then the location prefer OSPF route and the return traffic will use TATA OSPF ( from DC ). Because in DC you won't See the route for that location in BGP REL link . ( Since the BGP REL link is down for that location So no advertisement will come here)
Same will apply for every senario ( If DC link fail or REL link fail in locaiton )