Multiple devices performing the SLRM function can, and should, reside in parallel to provide redundant SLRM operation. The SLRM function is not dialog stateful, which allows active-active redundancy. Typically, the SLRM configuration on each redundant device is exactly the same.

Configuring the devices running SLRM as Session Agents within Session Agent Groups on Oracle SBCs is one method of establishing redundant connectivity. A more generic means of establishing redundant connectivity could be to use DNS techniques, such as dynamic or round-robin DNS, as the means for the P-CSCFs to reach redundant SLRMs.