Hi all,

 

Maybe I need a small hint.

 

I have got a configuration of 2    S-CSCF instances (both kamailio 4.4.5 with S-CSCF configuration, each on a separate virtual machine) in load sharing mode (50:50).

 

Both instances work on the same “scscf” data base, so that it is only one S-CSCF from a logical point of view.

 

Now I get into troubles with registration:

• P-CSCF sends REGISTER to first S-CSCF
• First S-CSCF answers with 401 Unauthorized an challenges the UE. So far everything OK.
• Second REGISTER is sent to second S-CSCF (DNS SRV Load Balancing).
• Second S-CSCF answers again with 401 Unauthorized (Error)
• This goes back and forth until UE gives up to register

 

This problem exists sporadically (approx. every fifth registration).

 

Now the question: is it worth to debug this configuration or should we rather switch to high available IP configuration (if we want to use kamailio)? What’s your opinion/experiences?

 

Thanks

Christoph