Slave SRU and master one cannot synchronize during upgrade. Slave SRU restarts continuously.
The console indicates that the software version of master SRU is inconsistent with that of slave one. The alarm light of SRU is on.
Reset slave SRU and enter into bootrom menu. Operate as follows:
a. Restart slave SRU. Ctrl+B and enter into bootrom menu.
b. Set TFTP download parameter.
c. Edit starting description area and set new started file.
d. Download started file to hard disc. Use filename of the step above.
e. Restart slave SRU.
After the operation is finished, it is normal.
During the process of synchronization, master SRU checks whether software version of master SRU is consistent with that of slave one. If it is inconsistent, slave one cannot synchronize.