/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. |