根据如下信息,我们可以判断出? <R1> display isis interface Interface information for ISIS(1)
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Interface Id IPV4.State IPV6.State MTU Type DIS
GE0/0/0 001 UP Up 1497 L1/L2 No/No
GE0/0/1 002 UP Up 1497 L1/L2 No/No
Loop0 001 UP Up 1500 L1/L2 --