OSPF behavior using different interface types.
|Interface Type||Uses DR/BDR?||Default|
|More than Two|
in the Subnet?
|Nonbroadcast 2 (NBMA)||Yes||30||Yes||Yes|
1 Default on Frame Relay point-to-point subinterfaces.
2 Default on Frame Relay physical and multipoint subinterfaces.
CCIE Routing and Switching Certification Guide 4th Edition
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