Ethernet Port Commands
Page 194 7210 SAS M, T, X, R6, R12, Mxp, S, Sx Interface Configuration Guide
The no form of the command disables physical layer loopback on the Ethernet port.
Note: The loop back command is not saved in the configuration file across a reboot.
Listed below is the recommended sequence of commands to be executed to perform loop back:
1. Disable the port, execute the command config>port> shutdown.
2. Enable loop back, execute the command config >port>ethernet> loopback internal
3. Enable the port, execute the command config>port> no shutdown.
4. Perform the required tests.
5. Disable the port, execute the command config>port> shutdown.
6. Disable loop back, execute the command config >port>ethernet> no loopback internal
7. Enable the port, execute the command config>port> no shutdown.
8. Enable the required services.
Listed below is the recommended sequence of commands to be executed to perform loop back when SFP or
XFPs are inserted into the device :
1. Insert SFP or XFPs. SFP or XFPs are not required in case of fixed copper ports.
2. Enable the port and execute the command config>port> [no] shutdown.
3. Disable the port and execute the command config>port> shutdown.
4. Enable loop back and execute the command config >port>ethernet> loopback internal
5. Enable the port and execute the command config>port> no shutdown.
6. Perform the required tests.
7. Disable the port and execute the command config>port> shutdown.
8. Disable loop back and execute the command config >port>ethernet> no loopback internal
9. Enable the port and execute the command config>port> no shutdown.
10. Enable the required services.
Listed below is the sequence of commands to be executed to perform loop back when SFP or XFPs are
changed :
1. Disable the port, execute the command config>port> shutdown.
2. Insert the new SFP or XFP.
3. Enable the port and execute the command config>port> no shutdown.
4. Disable the port and execute the command config>port> shutdown.
5. Enable loop back and execute the command config >port>ethernet> loopback internal.
6. Enable the port and execute the command config>port> no shutdown.
7. Perform the required tests.
8. Disable the port and execute the command config>port> shutdown.
9. Disable loop back and execute the command config >port>ethernet> no loopback internal.
10. Enable the port and execute the command config>port> no shutdown.
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