1 dscontrol highavailability 2 status 2backup 2.1add 2.1.1primary 2.1.1backup 2.1.1both 2.1.2auto 2.1.2manual 2.1.3p 2.1delete 2 リーチ (reach) 2.1 add 2.1 delete 2.2 address mask 2 heartbeat 2.1 add srcaddress dstaddress 2.1 delete address 2 takeover 2.1? address