多项选择题
对VPRN，7750SR提供的OAM有（）
A.OAMvprn-ping
B.oamvprn-trace
C.oammac-ping
D.oammac-trace
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多项选择题
A.OAMvprn-ping
B.oamvprn-trace
C.oammac-ping
D.oammac-trace
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