Hi all,
A fast upgrade of S series modular switches has high risks. If any exception occurs during the upgrade, the system rolls back all switches for at least one hour. During the rollback, services are affected. The per-chassis upgrade is more secure than the fast upgrade and minimizes the impact on services.
The following describes how to perform a per-chassis upgrade.
To upgrade a chassis by chassis, remove the MAD cable first and then trigger the split. In the following example, chassis 1 is the master chassis and chassis 2 is the slave chassis. The procedure is as follows:
Deleting the Forcible Master Configuration in a Stack: CSS master force undo CSS master force [chassis chassis-id]
All service interfaces of chassis 2 are shut down, and services are switched to chassis 1. Save the configuration of chassis 2. //The saved configuration is the full configuration of the two-chassis stack.
After chassis 2 is powered off and stack cables are removed, the two chassis are in the stack split state.
Power on chassis 2 and restart it. Upgrade the chassis to V200R010. The chassis is stable. // Do not save the configuration. In this case, the configuration of chassis 2 is the full configuration of the two chassis.
Shut down all service interfaces of chassis 1 and unblock all service interfaces of chassis 2. Services are switched to chassis 2. Save the configurations of chassis 1. // In this case, the configuration of subrack 1 is single-chassis.
Power off chassis 1 and then power on and restart it. Upgrade the chassis to the target version. Power off chassis 1 after it becomes stable. // Subrack 1 is powered off twice.
After the stack cables are connected, power on chassis 1.
The switch joins the stack and compares the startup duration to compete for the master switch. After a stack is set up, chassis 2 is the master switch and chassis 1 is the slave switch. During this period, chassis 2 does not restart. //Recover the configuration of subrack 2.
Save the configuration after services are normal.
Note: After the upgrade is complete, the original active node becomes the standby node. If you want to switch back to the system, perform an active/standby switchover.
#Configure the system to perform a master/slave main control board switchover. //Services are affected.
<Quidway> system-view
[Quidway] slave switchover enable
[Quidway] slave switchover
Warning: This operation will switch the slave board to the master board. Continue? [Y/N]:y
