It is possible that a SIP message can match more than one routing rule but the SIP proxy will stop evaluating at the first match. Routing rules are evaluated in the order that they appear in the configuration file. The set order routing rule panel enables the administrator to change this ordering.
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 > Set Order.