Routing rules enable an administrator to direct Session Initiation Protocol (SIP) traffic to a specific cluster when there is more than one cluster running SIP applications in a WebSphere Application Server Network Deployment cell.
Routing rules are not needed in cases where there is one cluster running SIP. Rules are only applied to the initial message of a SIP conversation and not all SIP traffic. To view this administrative console page, click Servers > Proxy Servers > server_name > SIP proxy settings > Routing rules.