Re: [SR-Users] RLS issue

Andrés, I'm not familiar with the routing policies of Open-IMS. thus you may want to ask also on their mailing lists. But at least I can talk about the RLS in general and Kamailio: Theory: ======= If the RLS receives a SUBSCRIBE for a RL it generates subscriptions for the list entries. These are either virtual subscriptions (if the RLS acts also as Presence Server and thus knows already the state of a list member in the same domain) or back-end subscriptions (if the list member is in another domain or RLS and PS are separate instances). If the list member is on another domain it depends on the local policies if the RLS sends the SUBSCRIBE directly to the target domain or sends the request to a local outboundproxy. If the list member is in the same domain but the RLS and PS are dedicated instances, then routing depends also on the local policy. Of course it would be most efficient if the RLS sends the SUBSCRIBE request directly to the PS, but local policy may also decide to route the request via some proxy (e.g. for accounting or authorization). Kamailio ======== RLS server in Kamailio is a dedicated module and has no direct interaction with presence server modules. Thus, RLS module does not support virtual subscriptions but all subscriptions are real SIP back-end subscriptions. RLS module in Kamailio does not support setting an outbound proxy (IIRC code is there but broken), thus, when RLS module sends SUBSCRIBE requests it always uses normal SIP resolutions mechanism to find the target address (NAPTR/SRV/A) Your Setup =========== Now, you have to decide how you want the SUBSCRIBE request to be routed - directly from RLS to PS or via some proxy? This is a policy decision and you have to decide (or maybe 3GPP has such a policy?). Once you have decided how you want the back-end SUBSCRIBE to be routed, then you can implement it - either current Kamailio behavior is fine or you have to find some workarounds. We recently had some discussions on the list about missing features in RLS module compared to Opensips' RLS module. Opensips support outboundproxy and also uses the proper resource list type. That's why I use Opensips as PS/RLS although my main proxy is still Kamailio. regards Klaus Am 04.01.2011 21:14, schrieb "Andrés S. García Ruiz":