This section of the manual covers upgrading the SGC and the TCAP stack.

Upgrading from OCSS7 1.1.0.x to OCSS7 2.0.0.x

Notable Changes

Hazelcast has been upgraded from version 2.6.5 to version 3.7. This fixes a number of cluster stability issues. Members of a Hazelcast 3.7 cluster are unable to communicate with members of a Hazelcast 2.6.x cluster, therefore it is necessary to ensure that all cluster members are running either SGC 2.0.0.x or 1.1.0.x, not a mix of the two.

The configuration file hazelcast.xml has changed substantially. The configuration should be reviewed, particularly for clusters with more than two members - see Hazelcast cluster configuration for details.

New SCCP and TCAP message statistics are available. Some statistics from the LocalSsnInfo JMX MBean (and associated display-info-localssninfo command line client command and SNMP counters) have been moved to the new SccpStats JMX MBean. See Statistics for details.

Online Upgrade Using STP Redirection

This approach manages the upgrade externally to Rhino and OCSS7, and requires support from the STP and surrounding network, as well as support in the existing service. It can be used for all types of upgrade.

Prerequisites

Before upgrading using STP redirection, make sure that:

  • Inbound TC-BEGINs are addressed to a "logical" GT. The STP translates this GT to one-of-N "physical" addresses using a load-balancing mechanism. These "physical" addresses route to a particular cluster.

  • The STP needs the ability to reconfigure the translation addresses in use at runtime.

  • The old and new clusters are assigned different "physical" addresses.

  • The service ensures that initial responding TC-CONTINUEs provide an SCCP Calling Party Address that is the "physical" address for the cluster that is responding.

  • Subsequent traffic uses the "physical" address using normal TCAP procedures.

Upgrade process

To upgrade using STP redirection:

  1. Set up the new clusters (Rhino and SGC) with a new "physical" address. Ensure that the new Rhino cluster has a different clusterID to the existing Rhino cluster. Similarly, the new SGC cluster must have a different Hazelcast cluster ID to the existing SGC cluster.

  2. Configure and activate the new clusters.

  3. Reconfigure the STP to include the new cluster’s physical address when translating the logical GT.

  4. Verify that traffic is processed by the new cluster correctly.

  5. Reconfigure the STP to exclude the old cluster’s physical address when translating the logical GT.

  6. Wait for all existing dialogs to drain from the old clusters.

  7. Halt the old clusters.

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