Hi Alex,

dispatcher module does not send new invites to inactive gateways. But in case a destination became inactive while some INVITEs were already through dispatcher, these recent inactive gateways may still be used for them.

Regarding the probing mode, dispatcher will never select a probing gateway as first option to route the call, but they are kept as alternative. This is the current implementation, we may add a module parameter to skip gateways in probing mode even for secondary alternatives.

Non-responsive gateways change the state after a while, see:
http://kamailio.org/docs/modules/stable/modules_k/dispatcher.html#id2567110

Cheers,
Daniel

On 11/12/10 12:58 PM, alex pappas wrote:

Dear all,

Does anyone can explain how Dispatcher module is sending calls to the gateways in the different states?

I mean if I have 3 gateways and the one of them is in Probing mode why Dispatcher is continuing sending there calls? Why this gateway is not changing from Probing to Inactive since is not replaying to OPTIONS messages send by Kamailio?

Configuration:

modparam("dispatcher", "flags", 2)
modparam("dispatcher", "ds_ping_interval", 5)
modparam("dispatcher", "ds_probing_mode", 1)
modparam("dispatcher", "ds_probing_threshhold", 2)
modparam("dispatcher", "dst_avp", "$avp(s:dst_avp)")
modparam("dispatcher", "grp_avp", "$avp(dsgrp)")
modparam("dispatcher", "cnt_avp", "$avp(i:202)")
modparam("dispatcher", "ds_append_branch", 0)

using db for gw:

setid 123,destination sip:xxx.xxxx.xxx, flag 0 ...

in ROUTE:
if(ds_select_domain("$avp(s:disp_dstgrp)", "4"))

in Failure Route

if(!ds_next_domain())

I want Dispatcher when it sees a node gateway that is dead , to Not send any other calls.

Thank you in advance

Alex
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http://www.asipto.com