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For redundancy, each node in an CSP can be configured with two EXNET-ONE card pairs and rings. Under normal operation, traffic is mirrored on both rings. If a node’s EXNET-ONE fails, all of the traffic for that node continues to be routed through the other EXNET-ONE card and ring, and no connected calls are lost.
Figure 10-5 EXNET Redundancy
Install the EXNET hardware for each ring as described in the Hardware section of the Installation and Maintenance Guide.
After the Logical Node IDs are assigned and the nodes are configured, you must configure each ring with the EXNET Ring Configure message. The host should maintain a record of the relationships between physical and logical EXNET rings (Logical Ring ID/Slot # of EXNET-ONE card).
See the Configuration section for details and examples for configuring the ring.