We are planning to migrate to MPLS from PRN using same provider, I have about 12 sites to migrate, new circuits have been provisioned and new routers are ready to be shipped to each site for installation.
Now, I am facing a dilemma, briefly speaking with provider they tell me that we can migrate a site a time no problem here, then next day they tell me it needs to be a hot cut over migration how can this be? so going back and forth and tayloring routers configurations I literally stopped, would like ask for assistance and your opinion on how to go about such migration to tentatively lock into a solid strategy.
Any documents out there you can point me to or experience in such migration will be appreciated.
All of our sites currently connect to PRN cloud including HQ, running OSPF multiple areas, at a glance I was thinking the provider would somehow bridge the two clouds so that I could build a parallel infrastructure and migrate branch offices one at a time but I am still unclear on how to proceed, I will be speaking with the provider more extensively in the next few days but any guidance will be appreciated.