请教S6520X在没有接线的以太网口上执行虚电缆检测的问题

通常来说如果接口没有接线的时候执行虚电缆检测信息是会返回什么呢？

用户现场测试是这样的，而且端口还是shutdown的状态，也没有接线，是正常还是不正常？

[swh02klngc01f-Ten-GigabitEthernet2/0/21]vi
Cable status:
  Pair A length: 211 meters
  Pair B length: 213 meters
  Pair A state: Abnormal(open)
  Pair B state: Abnormal(open)
Pair Impedance mismatch: no
Pair skew: - ns
Pair swap: -
Pair polarity: -
Insertion loss: - db
Return loss: - db
Near-end crosstalk: - db
[swh02klngc01f-Ten-GigabitEthernet2/0/21]vi
Cable status:
  Pair A length: 39 meters
  Pair B length: 213 meters
  Pair A state: Abnormal(short)
  Pair B state: Abnormal(open)
Pair Impedance mismatch: no
Pair skew: - ns
Pair swap: -
Pair polarity: -
Insertion loss: - db
Return loss: - db
Near-end crosstalk: - db