[SR-Users] Dispatcher is using gateways in Probing mode

Wed Nov 17 10:06:40 CET 2010

Ηι Carsten,

I added in my failure route the following :

if (t_check_status("408")) {
  ds_mark_dst("i");
}

and everything works fine.

Thank you very much for your help

Alex

On Tue, Nov 16, 2010 at 6:03 PM, Carsten Bock <lists at bock.info> wrote:

> Hi Alex,
>
> you must have set this to ds_mark_dst("i") instead of "p", only "i"
> will set the gateway to inactive.
> Also you should add a "t_check_status()" before calling ds_mark_dst()
> in order to define the codes, which should lead to the required state,
> e.g.:
>
> if (t_check_status("408|503")) {
>   ds_mark_dst("p");
> }
>
> So only in case the ds_mark_dst would only be called, if the status of
> the transaction was 408 (Request timeout) or 503 (Service
> unavailable).
>
> Please be aware, that the new setting to probing does only apply to
> new requests (retransmits to the disabled destination will still occur
> until the transaction does timeout).
>
> We have been using this functionality for several years now and we
> never had problems....
>
> Carsten
>
> 2010/11/16 alex pappas <rebel.pappas at gmail.com>:
> > Hi Carsten,
> >
> > I tried that before but it's not what I really need. By saying that ,
> when I
> > added this function to my failure route then every call failure that
> > happened (routing problem let's say) then immediately this GW was set to
> > Inactive mode and I was not able to use it.
> >
> > What I'm asking is to understand why Dispatcher module is sending calls
> to a
> > GW in P state?
> >
> > Thanks
> >
> > Alex
> >
> >
> >
> > On Tue, Nov 16, 2010 at 3:54 PM, Carsten Bock <lists at bock.info> wrote:
> >>
> >> Hi Alex,
> >>
> >> do you have a "ds_mark_dst("p")" in your failure route? This needs to
> >> be called "threshhold" times in order to set the gateway to probing...
> >> And please be aware of timeouts: If you have a Transaction-timeout of
> >> e.g. 60 seconds, then the failure-route would be executed after 60
> >> seconds and for this time the gateway would stay "active".
> >>
> >> Carsten
> >>
> >>
> >> 2010/11/16 alex pappas <rebel.pappas at gmail.com>:
> >> > Hi Daniel,
> >> >
> >> > I have configured that option before i send it the email.
> >> > modparam("dispatcher", "ds_probing_threshhold", 2)
> >> >
> >> > I have gateways A,A,B,C. (A and A is the same gw. I want to send more
> >> > calls
> >> > that's why is added twice)
> >> >
> >> > C is the dead gateway. It never responds back to the options because
> is
> >> > not
> >> > a real IP.
> >> >
> >> > When Dispatcher is sending the Invites it always includes the dead gw
> C
> >> > which by the way is in probing mode.
> >> >
> >> > Doing some test calls i have the following results in send it Invites:
> >> >
> >> > A, B, A, C
> >> > B, A, C, A
> >> > A, C, A, B
> >> > A, B , A ,C
> >> > B, A, C, A
> >> > A, C, A, B
> >> > A, B , A ,C
> >> > B, A, C, A
> >> > A, C, A, B
> >> > A, B, A, C
> >> > B, A, C, A
> >> >
> >> > As you can see the C dead gw is always included to the Invites send.
> >> >
> >> > Am i missing something in the configuration?
> >> > I also tried to use “9” - use weight based load distribution but with
> no
> >> > success. i got in the logs that this algorithm is not implemented. I'm
> >> > doing
> >> > something wrong here or is not implemented in this version of
> Kamailio.
> >> > (
> >> > 3.0.1)
> >> >
> >> > Thank you in advance for your help.
> >> >
> >> > Regards
> >> > Alex
> >> >
> >> >
> >> >
> >> >
> >> > On Fri, Nov 12, 2010 at 10:14 PM, Daniel-Constantin Mierla
> >> > <miconda at gmail.com> wrote:
> >> >>
> >> >> 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
> >> >>
> >> >>
> >> >>
> >> >> _______________________________________________
> >> >> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing
> list
> >> >> sr-users at lists.sip-router.org
> >> >> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
> >> >>
> >> >> --
> >> >> Daniel-Constantin Mierla
> >> >> http://www.asipto.com
> >> >
> >> > _______________________________________________
> >> > SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing
> list
> >> > sr-users at lists.sip-router.org
> >> > http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
> >> >
> >> >
> >>
> >>
> >>
> >> --
> >> Carsten Bock
> >> Schomburgstr. 80
> >> 22767 Hamburg
> >> Germany
> >>
> >> Mobile +49 179 2021244
> >> Home +49 40 34927217
> >> Fax +49 40 34927218
> >> mailto:carsten at bock.info
> >
> >
>
>
>
> --
> Carsten Bock
> Schomburgstr. 80
> 22767 Hamburg
> Germany
>
> Mobile +49 179 2021244
> Home +49 40 34927217
> Fax +49 40 34927218
> mailto:carsten at bock.info
>
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