Some situations call for migrating between routing protocols, for example, where one company is purchased by a larger company that has a security policy that prevents the use of any proprietary protocols anywhere in the organization. If the purchased company previously used EIGRP, it would have to migrate quickly to OSPF to adhere to the new organization’s policy. There are two ways to migrate between routing protocols:
- Using AD: This involves turning on the new protocol (OSPF in the example above) and then making certain that it has a higher AD than the existing EIGRP routing protocol . . .
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