My company recently merged with a small service provider that runs BGP/OSPF within their AS. We run the same protocols internally as well. I'm looking for some direction in merging the two networks. As of now, we have to keep our IP assignments separate and treat each network as it's own entity. I would like to eventually merge the two networks so we have one AS. I'm hoping someone in the community has experience with this type of change and would be able to provide some help/direction. I'm sure redistribution will be used, but i don't know how to start or where??? Any basic guidelines to follow or config examples would be greatly appreciated.
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Dealt with a company merger several years ago. Found VRF and double NAT useful tools. VRF allowed insertion of company's network onto acquired company's network infrastructure while still keeping them isolated. Double NAT allow communication between overlapping IP addresses during transition.