Sun GlassFish Communications Server 2.0 High Availability Administration Guide

Converged Load Balancing Algorithm for SIP Applications

For SIP and SIPS messages belonging to pure SIP applications, the converged load balancer uses a consistent hash algorithm, by default. If any of the rules in the DCR file match the SIP/SIPS request, a hash key is extracted using that rule. If none of the instructions or rules in the DCR file match the SIP or SIPS request, a hash key is generated using the from-tag,call-id parameters of the request.