[SR-Users] dispatcher & failover

Mititelu Stefan stefan.mititelu92 at gmail.com
Wed May 31 14:24:12 CEST 2017


Hi,

In the documentation I read the following for "ds_ping_reply_codes":

"Please note that the response codes the module accepts as valid reply to
the PING-Method are not only the ones generated from the remote servers,
but also those that are generated locally. E.g.: setting code=408 or
class=400 will never set a backend down even if it is, because internally
the Kamailio transaction layer generates a 408 in the case of no response
from the remote server, and this internal code 408 is accepted as valid
value"

Then I can see you set class=4 which probably collides with the above
statement.

Try removing the class=4 and give it a try. If it works, you can set
specific 4xx codes afterwards(if needed).

---
Stefan

On Tue, May 30, 2017 at 4:49 PM, Jean CĂ©rien <cerien.jean at gmail.com> wrote:

>
> Hello
>
> I am working with Kamailio 5.0 dispatcher module. I am aiming at having
> two or more gateways receiving the traffic with load balancing, and when
> one fails, that the traffic is distributed among others. Currently, testing
> with 2 gw.
>
> I see the options message going out (and not being answered). When I
> monitor with kamctl dispatcher dump, I never see the faulty gw going
> inactive (flags remain AP), and calls are still tried to the faulty gw.
>
> "Best" result so far is with ds_probing_mode=1, the flags start at AX with
> both gateway up, then AP once they've replied to an OPTIONS, and even if I
> stop one, and OPTIONS is no longer replied, it stays at AP. when a call
> comes through, it is tried on this GW (3 invites), and then fails onto the
> other one. I was expecting that the gw would not be tried if inactive.
>
> Am I missing something ?
>
> J.
>
> modparam("dispatcher", "db_url", DBURL)
> modparam("dispatcher", "table_name", "dispatcher")
> 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:probe at probe")
> modparam("dispatcher", "ds_ping_reply_codes", "class=2;class=3;class=4;
> class=5")
> modparam("dispatcher", "ds_ping_interval", 30)
> modparam("dispatcher", "ds_probing_mode", 1)
> modparam("dispatcher", "ds_probing_threshold", 3)
> modparam("dispatcher", "ds_timer_mode", 1)
>
>
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