Configuration Guide User guide

104 FastIron Configuration Guide
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Hitless management on the FSX 800 and FSX 1600
Executing a hitless switchover on the FSX 800 and
FSX 1600
Hitless failover must be enabled before a hitless switchover can be executed. To enable hitless
failover, refer to “Enabling hitless failover on the FSX 800 and FSX 1600” on page 103.
To switch over to the standby module (and thus make it the active module), enter the following
command.
Brocade# switch-over-active-role
Once you enter this command, the system will prompt you as follows.
Are you sure? (enter ’y’ or ’n’): y
Running Config data has been changed. Do you want to continue
the switch-over without saving the running config? (enter ’y’ or ’n’): n
Please save the running config and try switch-over again
Syntax: switch-over-active role
If this command is entered when hitless failover is disabled, the following message will appear on
the console:
Switch-over is not allowed. Reason: hitless-failover not configured.
Hitless OS upgrade on the FSX 800 and FSX 1600
Hitless Operating System (OS) Upgrade enables an operating system upgrade and switchover
without any packet loss to the services and protocols that are supported by Hitless management.
What happens during a Hitless OS upgrade
The following steps describe the internal events that occur during a hitless OS upgrade.
1. The standby management module resets and reloads with the new software image in its flash
memory.
2. The Ethernet interfaces (if present) on the standby module become operational and start
carrying data traffic.
3. The active management module synchronizes the standby management module with all the
information required to take over the active role.
4. The Layer 2 and Layer 3 control protocols on the standby management module converge. This
process takes approximately 70 seconds.
5. The standby management module takes over the active role.
6. The old active management module resets and reloads with the same software image running
on the newly active management module.
7. The FastIron switch is now operating with the new software image. The management module
that was initially configured as the standby management module is now the active
management module and the management module that was initially configured as the active
management module is now the standby.