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1. login to rddev111
2. ping dtm with cmd: ping cob_dtm. 
   1. if failed to ping the cob_dtm, could power cycle the COB
      1. open this switch , and the LED will turn to blue
         1. 
      2. close this switch, and the LED will turn off in a few second, and waiting for ~3 mins, try to ping cob_dtm again
         1. 
3. ping dpms with cmd: ping cob_dpmX  (X could be 2,3,4,5,6,7,8)
   1. for our setup, the cob_dpm7 is for the DPM0_rce0; cob_dpm8 is for the DPM0_rce2; the cob_dpm5 is for the DPM1_rce0; cob_dpm6 is for the DPM1_rce2; the cob_dpm3 is for the DPM3_rce0; cob_dpm4 is for the DPM3_rce2;
   2. if failed to ping the dpmX, need to restart it manually
      1. login to rddev111
      2. setup RCE SDK with cmd: source /opt/rce/setup.sh
      3. manually restart rce with Cmd: cob_rce_reset  [/slot[/bay[/rce]]]
         1. you can get help by: cob_rce_reset --help
         2. for our setup, the slot number is 4; if I want to restart the cob_dpm7, for example, it is the DPM0_rce0, the the bay number is 0, and rce number is 0. So, the full Cmd is "cob_rce_reset  atlas-sm/4/0/0"
         3. waiting about 3 mins for RCE to reboot

      4. you can also login dtm at first, them minicom to the dpm rce, with cmd: minicom bayX.Y   (X is the bay number, Y is the rce number)

         RCE	RCE IP-name	reboot cmd	minicom name
         DPM	cob_dpm3		minicom bay.0
         	cob_dpm4		minicom bay.2
         	cob_dpm5		minicom bay.0
         	cob_dpm6		minicom bay.2
         DPM0/RCE0	cob_dpm7	cob_rce_reset  atlas-sm/4/0/0	minicom bay0.0
         DPM0/RCE2	cob_dpm8		minicom bay0.2