/cfg/slb/sync/cluster
Cluster Sync Configuration
Synchronization of persistence information between Alteon devices that are members of the same Active-Active clusters (2-tier clusters) ensures persistency between a client and server so that the server provides the client with services even in cases where the Alteon device for a specific client fails. The Alteon cluster member that receives the new connections from the client can continue to forward new connections to the persistent server.
The /cfg/slb/sync/cluster command synchronizes Client IP and Cookie (insert, rewrite, and passive) persistency. The data is synchronized between cluster members over unicast UDP communication. New persistent entries are sent to all other cluster members in the following manner:
*If the keepalive interval is set to 0, new persistent entries are immediately synced.
*If the keepalive interval is set to a non-0 value, new persistent entries are synced when 32 entries are aggregated or when the keepalive interval is reached, whichever occurs first.
In addition, at every keepalive interval (every 180 secs if interval is 0), the persistency entries are scanned for aging time updates and the entries that have updated are synced using aggregated data (32 entries per message).
When a new Alteon is added to the cluster, or a device that went down comes back up, updates are triggered from all the existing members.
Note: Before configuring cluster persistent data synchronization:
*Session Persistency must be set to Client IP or Cookie (insert, rewrite, or passive) for virtual services.
*High Availability must be disabled.
*Sync Persistent Sessions must be disabled.
 
[Cluster Sync Menu]
add - Add cluster peer
rem  - Remove cluster peer
interval  - Set keepalive interval
on - Globally turn cluster sync ON
off - Globally turn cluster sync OFF
cur - Display current cluster sync configuration
 
Cluster Sync Menu Options (/cfg/slb/sync/cluster) 
Command Syntax and Usage
add <IP address (v4 or v6)>
 
Sets the IP address of the cluster peer to be added. The following prompts display:
Current IP address:
Enter new IP address (v4 or v6):
rem <IP address (v4 or v6)>
 
Sets the IP address of the cluster peer to be removed. The following prompts display:
Current IP address:
Enter new IP address (v4 or v6):
interval [0, 120 – 600]
 
Sets the keepalive interval (in seconds) for persistency entries synchronization.
Default: 180
on
 
Globally enables synchronization of cluster persistent data.
off
 
Globally disables synchronization of cluster persistent data.
cur
 
Displays the current cluster synchronization configuration.