ms-dos下怎么同时用两条命令?
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MSDOS是单任务系统,在命令行下是无法使用同时运行两条命令.除非使用新一代的多任务DOS 参考技术A 如果是单独的DOS系统，那就没办法了。你为什么想同时运行两条命令呢？是哪两条，说清楚一些或者有其它解决办法。用两条命令看出你买的H3C光模块是否是正品
display transceiver manuinfo interface
display transceiver interface
从下文可以看出
1/0/26
1/0/27
2/0/26
三个端口的光模块是假货！！！
三个端口的光模块是假货！！！
<1>display transceiver manuinfo interface
GigabitEthernet1/0/25 transceiver manufacture information:
Manu. Serial Number : 210231A563X09A003831
Manufacturing Date : 2009-10-14
Vendor Name : H3C
GigabitEthernet1/0/26 transceiver manufacture information:
Error: The transceiver does not support this function.
GigabitEthernet1/0/27 transceiver manufacture information:
Error: The transceiver does not support this function.
GigabitEthernet1/0/28 transceiver manufacture information:
Manu. Serial Number : 210231a562x089003814
Manufacturing Date : 2008-09-13
Vendor Name : H3C
GigabitEthernet2/0/25 transceiver manufacture information:
Manu. Serial Number : 210231a562x089003894
Manufacturing Date : 2008-09-13
Vendor Name : H3C
GigabitEthernet2/0/26 transceiver manufacture information:
Error: The transceiver does not support this function.
GigabitEthernet2/0/27 transceiver manufacture information:
Manu. Serial Number : 210231A563X09A003831
Manufacturing Date : 2009-10-14
Vendor Name : H3C
GigabitEthernet2/0/28 transceiver manufacture information:
Manu. Serial Number : 210231a562x089004152
Manufacturing Date : 2008-09-13
Vendor Name : H3C
<1>display transceiver interface
GigabitEthernet1/0/25 transceiver information:
Transceiver Type : 1000_BASE_LX_SFP
Connector Type : LC
Wavelength(nm) : 1310
Transfer Distance(km) : 20(9um)
Digital Diagnostic Monitoring : YES
Vendor Name : H3C
Ordering Name : SFP-GE-LX-SM1310-A
GigabitEthernet1/0/26 transceiver information:
Transceiver Type : 1000_BASE_SX_SFP
Connector Type : LC
Wavelength(nm) : 850
Transfer Distance(m) : 550(50um),270(62.5um)
Digital Diagnostic Monitoring : YES
Vendor Name : H 3 C
GigabitEthernet1/0/27 transceiver information:
Transceiver Type : 1000_BASE_SX_SFP
Connector Type : LC
Wavelength(nm) : 850
Transfer Distance(m) : 550(50um),270(62.5um)
Digital Diagnostic Monitoring : YES
Vendor Name : H 3 C
GigabitEthernet1/0/28 transceiver information:
Transceiver Type : 1000_BASE_SX_SFP
Connector Type : LC
Wavelength(nm) : 850
Transfer Distance(m) : 550(50um),270(62.5um)
Digital Diagnostic Monitoring : YES
Vendor Name : H3C
GigabitEthernet2/0/25 transceiver information:
Transceiver Type : 1000_BASE_SX_SFP
Connector Type : LC
Wavelength(nm) : 850
Transfer Distance(m) : 550(50um),270(62.5um)
Digital Diagnostic Monitoring : YES
Vendor Name : H3C
GigabitEthernet2/0/26 transceiver information:
Transceiver Type : 1000_BASE_SX_SFP
Connector Type : LC
Wavelength(nm) : 850
Transfer Distance(m) : 550(50um)
Digital Diagnostic Monitoring : YES
Vendor Name : H3C.
GigabitEthernet2/0/27 transceiver information:
Transceiver Type : 1000_BASE_LX_SFP
Connector Type : LC
Wavelength(nm) : 1310
Transfer Distance(km) : 20(9um)
Digital Diagnostic Monitoring : YES
Vendor Name : H3C
Ordering Name : SFP-GE-LX-SM1310-A
GigabitEthernet2/0/28 transceiver information:
Transceiver Type : 1000_BASE_SX_SFP
Connector Type : LC
Wavelength(nm) : 850
Transfer Distance(m) : 550(50um),270(62.5um)
Digital Diagnostic Monitoring : YES
Vendor Name : H3C
查看光衰，看光纤是否正常工作
查看光功率
dis transceiver diagnosis int t1/0/49
dis transceiver diagnosis int t1/0/49
s5560 光功率范围值
-14.4 到 0.5
s5500 光功率范围值
-8.2 到 0.5
-14.4 到 0.5
s5500 光功率范围值
-8.2 到 0.5
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