I have a question. I have a client that has numerous offices (branch) and a HQ site that points to 2 COLOs for redundancy purposes. It seems at all these remote sites there are OSPF routes (tons of them) to adjascent neighbors, etc. There are static routes colos or to other remote offices. There are also GRE tunnels connecting several offices together. In essence, to me this is a mess.
What would you recommend to use to eliminate all these messy OSPF routes on all these routers? What protocol or technology would you use to connect 18 offices more effeciently? MPLS? EIGRP?
If you are tunneling using GRE and there is alot of mess then DMVPN is to the rescue. I have faced a similar situation and DMVPN really helped. But if you dont need GRE and IPSEC then MPLS VPNs are best.
In MPLS, you would be peering to SP and also suppose to run dynamic protocol to exchange routes for your VRF in MPLS, what you can do is connect all the remote offices to MPLS and advertise their local networks into MPLS and from head office you can originate the default route that would be installed in every remote offices routing table using dynamic protocol.
So at Remote offices : you only have single default route leading towards HQ
and at head Quarter : you will have all prefixes from Remote offices.
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