Software Rollback
The Software rollback feature is available if the user experiences a problem with a software upgrade or a corrupted system.
When executed, the system will restore the previous software and database by a single command.
Bolt Software Rollback comprises the following attributes:
- Enables rapid rollback to previous releases.
- The database is restored just prior to switching
- The database exists with the load until that load is deleted.
- Database Rollback will restore the previous load and database
- Software Rollback will typically only take a few minutes, depending on the size of the network.
- Since OLT and ONTs, typically, still have the previous load, all can rapidly switch back.
Video
Access OLT Command Line Interface (CLI)
Connect via Console Serial RJ45
The BOLT is equipped with a Console Serial RJ45 interface which provides direct access to the Command Line Interface (CLI) found on all Tellabs OLTs. To use this interface, attach a standard Cisco serial cable from the OLT Console port to any serial port or USB to serial cable.
Once the cable is connected, open a serial terminal program (TeraTerm, putty, HyperTerminal, etc.) Typically, a serial port for the connection is automatically created. Select the correct port and login to the BOLT CLI interface to begin the turnup process.
When connecting directly to the OLT using the serial port, the serial parameters should be configured for standard N-8-1 (115, 200 bit/s, N, 8, 1) settings as follows:
- Speed: 115200
- Parity: none
- Data bits: 8
- Stop bits: 1
- Log into the OLT CLI. The default username and password for the system are: admin/tellabs
Tellabs Linux BOLT 3.1.33 MDS1-ESUA ttyS0 MDS1-ESUA login: admin <enter> Password: tellabs <enter> Welcome, admin! Last login: Mon Sep 15 18:22:55 EDT 2025 from 10.99.99.110 on pts/1 admin connected from 127.0.0.1 using console on MDS1-ESUA
Rollback Procedure
There are two ways to view the current and previous software by using the List or Show command.
- To use the list command, go to the MDS1-ESUA# command line, input tolt system software list, and press Enter. Output similar to the following is displayed listing the previous and running software list.
MDS1-ESUA# tolt system software list <enter> image-list SR33.0_620080 (remote) image-list SR34.0_620146 (remote) image-list SR34.0_620147 (remote) image-list SR34.0_620148 (local, previous) image-list SR34.0_620149 (remote) image-list SR34.0_620150 (local, running) image-list SR34.0_620927 (local) image-list SR34.0_620928 (local) image-list SR34.0_620952 (remote) MDS1-ESUA# _
- To use the show command, go to the MDS1-ESUA(config)# command line, input show tolt system software inventory and press Enter. Output similar to the following is displayed listing both the running (current) System Version and previous (backup) System Version software.
MDS1-ESUA# show olt system software inventory <enter> INSTALLED BUILD BUILD SYSTEM BUILD BUILD SYSTEM CARD AID TYPE DATE VERSION ID VERSION DATE VERSION ID VERSION ------------------------------------------------------------------------------------------------------------------------ MDS1-ESUA xpon16p28 250923 XPON16P28_V620135 SR34.0_620150 250911 XPON16P28_V620133 SR34.0_620148 MDS1-ESUA# _
The user will use the rollback command to automatically roll back the software to the previous version.
- From the MDS1-ESUA# command line, input tolt system software rollback, and press Enter. The system will locate the previous software/database (SR34.0_620148), restore the software/database to the unit, and then switch (downgrade) from the current (SR34.0_620150) to the previous (SR34.0_620148) version.
MDS1-ESUA# tolt system software roolback <enter> ---- Software Rollback process--- ---- Approximately 4 mibnutes (depending on size)---- Start kernel images and FPGA validation: DO NOT POWER DOWN THE UNIT Kernel images and FPGA validated. OLT Type : BOLT Switch Type : XPON16P28 System Version : SR34.0_620148 Starting crond: OK Tellabs Linux BOLT 3.1.33 MDS1-ESUA ttyS0 MDS1-ESUA login: - When finished, the system will be running on the previous software and database configuration.