Re: Dispatcher sets IP flag on servers even though SIP OPTIONS receive 200 OK

... Also iptables is an obvious culprit that I missed, so maybe check that
first.

James

On Wed 25 Jun 2025, 10:23 James Browne, <[email protected]> wrote:

> Indeed they are transmissions. The <<< and >>> indicate that in the
> screenshot (and the timestamps of the messages also strongly suggest it).
>
> The responses come on the network, but kamailio/dispatcher is not getting
> them. Maybe they don't even get to kamailio (wrong UDP checksum, for
> example), maybe kamailio is dropping them (they're malformed or the Via is
> wrecked, for example) or maybe your config file is somehow dropping them.
> Maybe even it's something else.
>
> With a pcap file, we may be able to narrow these multiple possibilities.
>
> James
>
>
> On Wed 25 Jun 2025, 08:42 Daniel-Constantin Mierla via sr-users, <
> [email protected]> wrote:
>
>> Hello,
>>
>> you have to send the pcap with the keepalive OPTIONS? The screen shots
>> are not that useful for troubleshooting, it is some indication of
>> retransmissions, but it cannot be asserted properly on the screenshot.
>> Furthermore, the dispatcher.list output shows 183 timeouts, meaning that
>> the gateways haven't responded to 183 keepalives till that moment.
>>
>> Cheers,
>> Daniel
>> On 24.06.25 20:51, Pablo Oliver via sr-users wrote:
>>
>> Hi there,
>>
>> I'm new to Kamailio, and maybe this is a silly question.
>>
>> I’ve set up Kamailio as a SIP proxy with two Asterisk servers acting as
>> media services.
>>
>> This is my configuration for the dispatcher module:
>>
>> loadmodule "dispatcher.so"
>>
>> modparam("dispatcher", "db_url", DBURL)
>> modparam("dispatcher", "table_name", "dispatcher")
>> modparam("dispatcher", "flags", 2)
>> modparam("dispatcher", "ds_ping_interval", 20)
>> modparam("dispatcher", "ds_ping_method", "OPTIONS")
>> modparam("dispatcher", "ds_probing_threshold", 5)
>> modparam("dispatcher", "ds_inactive_threshold", 5)
>> modparam("dispatcher", "ds_ping_latency_stats", 1)
>> modparam("dispatcher", "ds_probing_mode", 1)
>> modparam("dispatcher", "ds_ping_reply_codes",
>> "class=2;code=403;code=488;class=3")
>> modparam("dispatcher", "ds_ping_from", SIPCALL)
>>
>> I can see the SIP OPTIONS requests going from Kamailio to Asterisk and
>> receiving 200 OK responses.
>>
>>
>>
>> However, the dispatcher is still setting the IP (Inactive Probing) flag
>> on the servers:
>>
>> kamcmd dispatcher.list
>> {
>>  NRSETS: 1
>>  RECORDS: {
>>   SET: {
>>    ID: 1
>>    TARGETS: {
>>     DEST: {
>>      URI: sip:172.16.254.21:5060
>>      FLAGS: IP
>>      PRIORITY: 0
>>      LATENCY: {
>>       AVG: 0
>>       STD: 0
>>       EST: 0
>>       MAX: 0
>>       TIMEOUT: 183
>>      }
>>     }
>>     DEST: {
>>      URI: sip:172.16.254.20:5060
>>      FLAGS: IP
>>      PRIORITY: 0
>>      LATENCY: {
>>       AVG: 0
>>       STD: 0
>>       EST: 0
>>       MAX: 0
>>       TIMEOUT: 183
>>      }
>>     }
>>    }
>>   }
>>  }
>> }
>>
>>
>> So when I try to use ds_select_dst("1", "4"), it always fails.
>>
>> Did I miss something in my configuration?
>>
>> Thanks!
>>
>> Regards,
>> Pablo.
>>
>>
>> __________________________________________________________
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>> --
>> Daniel-Constantin Mierla (@ asipto.com)twitter.com/miconda -- linkedin.com/in/miconda
>> Kamailio Consultancy, Training and Development Services -- asipto.com
>>
>> __________________________________________________________
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>> [email protected]
>> To unsubscribe send an email to [email protected]
>> Important: keep the mailing list in the recipients, do not reply only to
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>>
>

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