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There is no BGP TCP AO as an option
Router(config-router)#nei 1.1.1.1 a?activate advertise-map advertisement-interval allowas-in
Router(config-router)#do sh ver | s IOSCisco IOS Software, 2801 Software (C2801-IPBASEK9-M), Version 15.1(4)M12a, RELEASE...
