Creating SIP ports for load balancing in a Sametime Gateway cluster

If you deployed multiple IBM® WebSphere® proxy servers with a cluster, you will need to configure additional ports for use with IBM Load Balancer so it can distribute connections among the individual proxy servers. Configure the complete set of ports for every WebSphere proxy server used by the cluster.

Procedure

  1. On the WebSphere proxy server, log in to the Integrated Solutions Console as the WebSphere administrator.
  2. In the navigator, click Servers > Server Types > WebSphere proxy servers.
  3. In the proxy servers table, click on the name of the server that you want to configure.
  4. On the Configuration page, look under "Communications" and click Ports.
  5. In the Ports table, create a non-secured SIP port as follows:
    1. Click New.
    2. Select User-defined Port.
    3. In the Specify Port Name field, type PROXY_SIP_ADDRESS_LB.
    4. In the Host field, type the virtual IP address that is configured as the cluster address on your load balancer.
    5. In the Port field, type the non-secured SIP port value (typically, 5060).

      This value corresponds to the non-secured (TCP) port through which the load balanced servers are configured to accept traffic.

    6. Click OK to save the new port definition.
    7. Save the change to the master configuration by clicking the Save link in the "Messages" box at the beginning of the page.
  6. Now create a secure SIP port:
    1. Click New.
    2. Select User-defined Port.
    3. In the Specify Port Name field, type PROXY_SIPS_ADDRESS_LB.

      Notice that this time, the port's name contains an "S" at the end of "SIP" to indicate a secure port.

    4. In the Host field, type the virtual IP address that is configured as the cluster address on your load balancer.
    5. In the Port field, type the secure SIP port value (typically, 5061).

      This value corresponds to the secure (TLS) port through which the load balanced servers are configured to accept traffic.

    6. Click OK to save the new port definition.
    7. Save the change to the master configuration by clicking the Save link in the "Messages" box at the beginning of the page.
  7. Restart the WebSphere proxy server.
  8. Repeat this task for every WebSphere proxy server that is used with the cluster, making sure to specify the same port values on all of the proxy servers (all proxy servers operating with a particular cluster must use the same SIP ports).