[SR-Users] Issue with Dispatcher Failover algorithm
Cristi Constantin
cristi.constantin at gmail.com
Tue May 30 13:18:57 CEST 2017
That's great. Thanks a lot.
Best regards,
Cristian
On 5/30/17, Daniel-Constantin Mierla <miconda at gmail.com> wrote:
> Hello,
>
> I was traveling during the past two weeks and didn't have the time to
> look properly at it. Hopefully today or tomorrow I will get to it.
>
> Cheers,
> Daniel
>
>
> On 29.05.17 23:14, Cristi Constantin wrote:
>> 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 <mailto: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 <http://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 <mailto: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
>> <mailto: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
>> <http://10.126.54.51:5060>;transport=sctp 9 1
>> 7 sip:10.126.55.51:5060
>> <http://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
>> <http://10.126.55.51:5060>;transport=sctp
>> FLAGS: AP
>> PRIORITY: 2
>> }
>> DEST: {
>> URI:
>> sip:10.126.54.51:5060
>> <http://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
>>
>>
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>>
>>
>>
>>
>> --
>> Daniel-Constantin Mierla - http://www.asipto.com
>> http://twitter.com/#!/miconda
>> <http://twitter.com/#%21/miconda> -
>> http://www.linkedin.com/in/miconda
>> <http://www.linkedin.com/in/miconda>
>>
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>>
>>
>>
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>
> --
> Daniel-Constantin Mierla
> www.twitter.com/miconda -- www.linkedin.com/in/miconda
> Kamailio Advanced Training - May 22-24 (USA) - www.asipto.com
> Kamailio World Conference - May 8-10, 2017 - www.kamailioworld.com
>
>
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