Before relinquishing primary status and initiating
failover, review the section
Synchronizing Nodes to confirm that your platform and both installed MSMs/MMs or
master-capable nodes are running software that supports the
synchronize
command.
-
Use the show switch {detail} command on the
primary or the backup node to confirm that the nodes are synchronized and have identical
software and switch configurations before failover.
A node may not be synchronized because
checkpointing did not occur, incompatible software is running on the primary and backup,
or the backup is down.
If the nodes are not synchronized and both nodes
are running a version of
ExtremeXOS that supports synchronization, proceed to step
2.
If the nodes are synchronized, proceed to step
3.
The output displays the status of the
nodes, with the primary node showing MASTER and the backup node showing BACKUP
(InSync).
-
If the nodes are not synchronized
because of incompatible software, use the synchronize command to ensure
that the backup has the same software in flash as the primary.
The
synchronize command:
- Reboots the backup node to prepare it for synchronizing with the
primary node.
- Copies both the primary and secondary software images.
- Copies both the primary and secondary configurations.
- Reboots the backup node after replication is complete.
After you confirm the nodes are
synchronized, proceed to step
3.
-
If the nodes are synchronized, use the
run failover {force} command to initiate failover
from the primary node to the backup node.
The backup node then becomes the
primary node and the original primary node reboots.
