[SR-Users] Issue with Dispatcher Failover algorithm

[Cristi Constantin]

Hi Daniel,

Did you got the chance to look at the trace attached?
I still not managed to figure out why failover is not working in my
Kamailio configuration..

Thank you,
Cristian

On Thu, May 25, 2017 at 5:17 PM, Cristi Constantin <
cristi.constantin at gmail.com> wrote:

> Hi Daniel,
>
> I attached a pcap trace. It contains several SIP messages, but please
> check the INVITEs from 10.224.74.36 (Kamailio) to
> 10.126.54.51/10.126.55.51.
>
> Thanks for you support,
> Cristian
>
> On Thu, May 25, 2017 at 5:04 PM, Daniel-Constantin Mierla <
> miconda at gmail.com> wrote:
>
>> Hello,
>>
>> can you sent pcap or ngrep output with all sip messages of such case
>> exposing the issue you have?
>>
>> Cheers,
>> Daniel
>>
>> On Thu, May 25, 2017 at 2:18 PM, Cristi Constantin <
>> cristi.constantin at gmail.com> wrote:
>>
>>> Hello,
>>>
>>> I have an issue with the behavior of ds_select_dst() method in case of
>>> using algorithm 8 (dispatch based on priority). In case both destinations
>>> are available, they are used alternatively, instead of always using the one
>>> with the highest priority.
>>>
>>> By searching through the mailing list I found that the lower the
>>> priority number, the higher the priority (1 is first, 2 is second, etc.).
>>> Based on this, I set the following in dispatcher.list:
>>> 7 sip:10.126.54.51:5060;transport=sctp 9 1
>>> 7 sip:10.126.55.51:5060;transport=sctp 9 2
>>>
>>> After running "kamcmd dispatcher.reload" and "kamcmd dispatcher.list", I
>>> have the confirmation that the priorities are correctly set:
>>>                 SET: {
>>>                         ID: 7
>>>                         TARGETS: {
>>>                                 DEST: {
>>>                                         URI: sip:10.126.55.51:5060
>>> ;transport=sctp
>>>                                         FLAGS: AP
>>>                                         PRIORITY: 2
>>>                                 }
>>>                                 DEST: {
>>>                                         URI: sip:10.126.54.51:5060
>>> ;transport=sctp
>>>                                         FLAGS: AP
>>>                                         PRIORITY: 1
>>>                                 }
>>>                         }
>>>                 }
>>>
>>> The dispatcher settings from kamailio.cfg is the following:
>>> modparam("dispatcher", "list_file", "/etc/kamailio/dispatcher.list")
>>> modparam("dispatcher", "flags", 2)
>>> modparam("dispatcher", "ds_ping_interval", 10)
>>> modparam("dispatcher", "ds_ping_method", "OPTIONS")
>>> modparam("dispatcher", "ds_ping_from", "sip:kamailio at sdp-t-lb2")
>>> modparam("dispatcher", "ds_probing_mode", 3)
>>> modparam("dispatcher", "dst_avp", "$avp(AVP_DST)")
>>> modparam("dispatcher", "grp_avp", "$avp(AVP_GRP)")
>>> modparam("dispatcher", "cnt_avp", "$avp(AVP_CNT)")
>>> modparam("dispatcher", "sock_avp", "$avp(AVP_SOCK)")
>>>
>>> And the code which should do the displatch is the following:
>>>
>>>       if (ds_is_from_list(7, 3, "$ru")) {
>>>           remove_hf("Route");
>>>           if(!ds_select_dst("7", "8")) {
>>>             send_reply("404", "No destination");
>>>             exit;
>>>           }
>>>       }
>>>
>>> With the settings above, I was expecting to always have the messages
>>> delivered to 10.126.54.51. Instead, they are dispathed to 10.126.54.51 and
>>> 10.126.55.51 alternatively.
>>>
>>> Thanks a lot,
>>> Cristian
>>>
>>>
>>> _______________________________________________
>>> Kamailio (SER) - Users Mailing List
>>> sr-users at lists.kamailio.org
>>> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
>>>
>>>
>>
>>
>> --
>> Daniel-Constantin Mierla - http://www.asipto.com
>> http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda
>>
>> _______________________________________________
>> Kamailio (SER) - Users Mailing List
>> sr-users at lists.kamailio.org
>> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
>>
>>
>
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