Replicating Data Between Nodes - Extreme Networks ExtremeWare XOS Guide Manual

Managing the Switch
Configuring the Node Priority
To configure the priority of an MSM node, use the following command:
configure node slot <slot_id> priority <node_pri>
If you do not configure any priorities, MSM-A has a higher priority than MSM-B. For the
parameter, enter A for the MSM installed in slot A or B for the MSM installed in slot B. By default, the
priority is 0 and the node priority range is 1 through 100. The lower the value, the higher the priority.
Relinquishing Master Status
You can cause the master to failover to the backup, thereby relinquishing its master status. To cause the
failover, complete the following steps:
1 Use the
show switch {detail}
identical software and switch configurations before failover. The output displays the status of the
MSMs, with the master MSM showing
A node may not be synchronized because checkpointing did not occur, incompatible software is
running on the master and backup, or the backup is down.
If the nodes are not synchronized, and both MSMs are running ExtremeWare XOS 11.0 or later,
●
proceed to step 2.
If the nodes are not synchronized, and one MSM is running ExtremeWare XOS 10.1 or earlier,
●
proceed to step 3.
If the nodes are synchronized, proceed to step 3.
●
2 Use the
synchronize
master.
NOTE
Both the backup and the master MSMs must be running ExtremeWare XOS 11.0 or later to use the
command.
synchronize
The command:
synchronize
Reboots the backup MSM to prepare it for synchronizing with the master MSM
●
Copies both the primary and secondary software images
●
Copies both the primary and secondary configurations
●
Reboots the backup MSM after replication is complete
●
3 Initiate failover from the master MSM to the backup MSM.
If both nodes are running ExtremeWare XOS 11.0 or later, use the
●
If one node is running ExtremeWare XOS 10.1 or earlier, use the
●
command. By specifying
the MSMs.

Replicating Data Between Nodes

ExtremeWare XOS replicates configuration and run-time information between the master MSM and the
backup MSM so that the system can recover if the master fails. This method of replicating data is
known as checkpointing. Checkpointing is the process of automatically copying the active state from the
master to the backup, which allows for state recovery if the master fails.
ExtremeWare XOS 11.1 Concepts Guide
command to confirm that the nodes are synchronized and have
MASTER
command to ensure that the backup has the same software in flash as the
, failover occurs regardless of the version of software running on
force
and the backup MSM showing
run msm-failover
run msm-failover {force}
slot_id
.
BACKUP (InSync)
command.
52