This attribute sets the preference level of OSPF-internal routes to be less
preferred than RIP.
Note:
This parameter should only be used when starting migration of network
from RIP to OSPF. When ready to cutover to OSPF, set this attribute
value to disabled and run under normal preferences. All OSPF routers in
the Autonomous System should be running with migrateRip enabled or
with migrateRip disabled to prevent routing loops. It is important that
the changeover period from RIP to OSPF be performed quickly on all
OSPF routers so that no routing loops are formed. These routing loops
could be caused by conflicts in the internal RIP and OSPF databases.