2-Site redundancy is the ability to lose an entire site, for example due to a natural disaster or major network failure, without losing signaling or application state data. For PCA, this means no loss of Policy Binding or Policy Session data. In order to achieve site redundancy, the following configuration applies:
- PCA is deployed on at least one mated pair of PCA DSRs.
- Clients and PCRFs/OCSs are able to connect to both sites in the mated pair.
- SBR server groups are set up to use the Active/Standby/Spare or Active/Spare redundancy model.
- System OAM (SOAM) server groups are set up to use the Active/Standby/Spare redundancy model.
- Diameter Agent MP servers are recommended to be engineered at 40% capacity across the mated pair.