[SR-Users] Dispatcher Confusion Redeux

[Daniel-Constantin Mierla]

Hello,

I haven't read the archive, but you probably talk about what I am 
thinking of. IIRC, at that time Carsten tried to explain how it works, 
but overall looked confused indeed. As a result, dispatcher module in 
3.2.0 has a different system for gateway states.

There are three of them:
- active
- inactive
- disabled

The active and inactive states can be set also in probing mode, so then 
there will be keepalives sent to gateways to detect when they become 
inactive/active. The disabled state is to put a gateway out of order 
completely.

Maybe you can give a try to 3.2.0 dispatcher, now that it is out as a 
stable release, and see if it is more meaningful behavior.

Cheers,
Daniel

On 10/19/11 10:47 PM, Asgaroth wrote:
> Hi All,
>
> I'd like to clear something up with the diapatcher module and it's
> probing parameters:
>
> First things first:
>
> ./kamailio -V
> version: kamailio 3.1.5 (i386/linux) 76fff5
> flags: STATS: Off, USE_IPV6, USE_TCP, USE_TLS, TLS_HOOKS, USE_RAW_SOCKS,
> DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MEM, SHM_MMAP, PKG_MALLOC,
> DBG_QM_MALLOC, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE,
> USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLACKLIST, HAVE_RESOLV_RES
> ADAPTIVE_WAIT_LOOPS=1024, MAX_RECV_BUFFER_SIZE 262144, MAX_LISTEN 16,
> MAX_URI_SIZE 1024, BUF_SIZE 65535, PKG_SIZE 4MB
> poll method support: poll, epoll_lt, epoll_et, sigio_rt, select.
> id: 76fff5
> compiled on 16:21:02 Oct 19 2011 with gcc 4.1.2
>
> I think I am suffering from the same confusion as Klaus in the following
> archive message:
>
> http://web.archiveorange.com/archive/v/jZFTG61DlcEr9LJbS8Gq
>
> I have the following parameters set for the dispatcher module:
>
> modparam("dispatcher", "ds_ping_interval", 10)
> modparam("dispatcher", "ds_probing_threshhold", 1)
> modparam("dispatcher", "ds_probing_mode", 0)
>
> When I first start kamailio all gateways are active, no probing occurs.
> If I then set a gateway inactive (ds_set_state i 1 sip:...), no probing
> occurs.
> If I then set same gateway active (ds_set_state a 1 sip:...), no probing
> occurs.
> If I mark same gateway as probing (ds_mark_dst("p") after 1 attempt as
> specified in module parameter), then probing starts.
> If I then set same gateway inactive (ds_set_state i 1 sip:...) probing
> still occurs.
>
> According to the docs if I set the state of a gateway to inactive then
> no probing should occur. From my understanding of the docs, if I set
> ds_probing_mode to 0 then only gateways marked as probing will be "pinged".
>
> Can someone with more experienced than myself please clarify how this
> method is supposed to work.
>
> Thanks
>
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-- 
Daniel-Constantin Mierla -- http://www.asipto.com
Kamailio Advanced Training, Dec 5-8, Berlin: http://asipto.com/u/kat
http://linkedin.com/in/miconda -- http://twitter.com/miconda