Hi, dear experts!
I) My Input data is (read please, or see attach):
- I have one active data center (main office), one backup data center (backup office), and several branch offices and many corporate internet users
- Each of the offices has redundant internet connection: Main office via ISP1 and ISP2, backup office via ISP3 and ISP4.
- Standby data center duplicates corporates services (such as Exchange, Sharepoint, FileStorage).
- Main office and backup office are long-distanced from each other (about 800 km), and interconnected via 1Gb fiberoptic.
II) My tasks are:
1. Provide redundant network connection for local ofiice users to corporate services.
2. Provide redundant network connection for branch offices and internet users to corporate services.
III) My ideas are:
1. Accordingly to the 1-st task. Here I suppose to use load balancers in redundant configuration.
2. Accordingly to the 2-nd task. To my mind there are two scenarios.
2.1 First scenario. To built a DMVPN topology using main and backup offices as a hubs, and branch offices as a spokes.
2.2 Second scenario. To by provider independet IPv4-adress block and ASN, to advertise main and backup office networks in internet.
IV) My questions are:
-What scenario according to the 2-nd task is better: using a DMVPN-topology or using an ASN-redundancy?
-Is it possible to avoid assymetric routing problems in case of using a an ASN-redundancy?
Thank you!
