[SR-Users] Problems with probing in dispatcher module

Paulo Ferreira paulo.ferreira at fccn.pt
Thu Jan 18 16:47:50 CET 2018


Hi list,

problem solved. Appears that the module caught internal erros to probes
so, we must be careful when using response classes instead of response
codes ;)

This warning it's in the docs, but when I read it I didn't relate it
with this problem.

I solved configuring the exact response codes to probes:

modparam("dispatcher", "ds_ping_reply_codes",
"code=500;code=480;code=200");

Regards,
Paulo


On Wed, 2018-01-17 at 14:33 +0000, Paulo Ferreira wrote:
> Hi list,
> I'm using dispatcher module and I'm not able to figure it out how to
> accomplish a simple task regarding gateways availability and
> probings.
> 
> My goal is to probe with SIP OPTIONS my three gatways every, for
> example, 30 seconds. When one, or more, of them respond with
> unexpected
> message or simply do not respond at all, dispatcher module put
> it/them
> as inactive automatically.
> 
> I tried several conf scenarios but without success, all with gateway
> A
> off. Fore example:
> 
> 1 -> I configure the three gateways (A, B and C) in conf file
> (sip.peers as configuration bellow) with flags 8 setted (probing
> destination).
> 	- When I start kamailio with probing mode equal to 1, all
> gateways present flags AP (using kamctl dispatcher dump) and nothing
> change (I only see OPTIONS sent to host B and C).
> 	- with probing mode setted to 0, all gateways start with flags
> AP, after 30 seconds, first OPTIONS are sent (only for B a C again),
> both B and C pass to AX and after more 30 seconds (ping interval
> defined) gateway A pass also to AX and OPTIONS stop being sent.
> 
> 2-> Now I configured the gateways in conf file with flags 1 (inactive
> destination).
> 	- With prob mode 1, all started as IX, 30 seconds later it
> sends OPTIONS only for gw B and C and both change state to AP and A
> maintain IX. After more 30 seconds, no more OPTIONS are sent and gw A
> pass also to AP (hoped it remained IP or IX but not happened).
> 
> I also tried other combinations of these two parameters, but only the
> onde I described above make me sense for my purpose.
> 
> Maybe the solution is simple but I'm not getting there or maybe this
> it
> is only possible using failure or timeout routes and setting flags
> manually to gateways :(
> 
> Can anyone point out the solution for this if it exists?
> 
> module configuration used:
> modparam("dispatcher", "list_file", "sip.peers");
> modparam("dispatcher", "flags", 2);
> 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)");
> modparam("dispatcher", "ds_ping_method", "OPTIONS");
> modparam("dispatcher", "ds_ping_from", "sip:ping at test.tt");
> modparam("dispatcher", "ds_ping_interval", 30);
> modparam("dispatcher", "ds_probing_threshold", 1);
> modparam("dispatcher", "ds_inactive_threshold", 1);
> modparam("dispatcher", "ds_ping_reply_codes",
> "class=2;class=4;class=5;class=3");
> modparam("dispatcher", "ds_probing_mode", 1);
> 
> 
> Thanks in advance,
> Paulo
> 
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> sr-users at lists.kamailio.org
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-- 
-------------------------------------------
Paulo Ferreira
VoIP at RCTS - Área de Infraestruturas Aplicacionaisz
FCCN
http://www.fccn.pt/
Av. do Brasil, n.º 101
1700-066 Lisboa - Portugal
Telefone|Phone: +351 218440100; Fax: +351 218472167

 
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