Hello Everyone,

I am really having an issue getting kamailio to try another dispatch route when I get a 500 back from one of my freeswitch servers.

Currently I have a list of freeswitch servers located in my dispatch.list file. If one of then is to busy it will respond with a 500 Maximum Call in Progress. I am trying to get Kamailio to go to the next route in the dispatch.list when it get one of these 503 and if it should exhaust the whole list respond with a 503. Here is my kamailio config

####### Global Parameters #########

#!ifdef WITH_DEBUG

debug=4

log_stderror=yes

#!else

debug=4

log_stderror=yes

#!endif

memdbg=5

memlog=5

log_facility=LOG_LOCAL0

fork=yes

children=10

/* comment the next line to enable TCP */

disable_tcp=yes

/* uncomment the next line to disable the auto discovery of local aliases

   based on revers DNS on IPs (default on) */

auto_aliases=no

/* uncomment and configure the following line if you want Kamailio to

   bind on a specific interface/port/proto (default bind on all available) */

listen=udp:eth0:5060

sip_warning=no

####### Modules Section ########

#set module path

mpath="/usr/local/lib64/kamailio/modules_k/:/usr/local/lib64/kamailio/modules/"

loadmodule "mi_fifo.so"

loadmodule "kex.so"

loadmodule "tm.so"

loadmodule "tmx.so"

loadmodule "sl.so"

loadmodule "rr.so"

loadmodule "pv.so"

loadmodule "maxfwd.so"

loadmodule "textops.so"

loadmodule "siputils.so"

loadmodule "xlog.so"

loadmodule "sanity.so"

loadmodule "ctl.so"

loadmodule "mi_rpc.so"

loadmodule "acc.so"

loadmodule "dispatcher.so"

# ----------------- setting module-specific parameters --------------- 

# ----- mi_fifo params -----

modparam("mi_fifo", "fifo_name", "/tmp/kamailio_fifo")

modparam("xlog", "buf_size", 8192)

# ----- rr params -----

# add value to ;lr param to cope with most of the UAs

modparam("rr", "enable_full_lr", 1)

# do not append from tag to the RR (no need for this script)

modparam("rr", "append_fromtag", 0)

# ----- acc params -----

modparam("acc", "log_flag", 1)

modparam("acc", "failed_transaction_flag", 3)

modparam("acc", "log_extra", "src_user=$fU;src_domain=$fd;dst_ouser=$tU;dst_user=$rU;dst_domain=$rd;src_ip=$si")

# ----- tm params -----

modparam("tm", "fr_timer", 2000)

modparam("tm", "fr_inv_timer", 40000)

modparam("tm", "remap_503_500", 0)

# ----- dispatcher params -----

modparam("dispatcher", "list_file", "/usr/local/etc/kamailio/dispatcher.list")

modparam("dispatcher", "flags", 2)

modparam("dispatcher", "dst_avp", "$avp(i:271)")

modparam("dispatcher", "grp_avp", "$avp(i:272)")

modparam("dispatcher", "cnt_avp", "$avp(i:273)")

#modparam("dispatcher", "dst_avp", "$avp(AVP_DST)")

#modparam("dispatcher", "grp_avp", "$avp(AVP_GRP)")

#modparam("dispatcher", "cnt_avp", "$avp(AVP_CNT)")

#modparam("dispatcher", "ds_append_branch", 1)

####### Routing Logic ########

# main request routing logic

route {

        append_hf("X-VSIP-CUST-IP: $si\r\n");

        route(DISPATCH);

        route(RELAY);

}

# Dispatch requests

route[DISPATCH] {

        # round robin dispatching on gateways group '1'

        if(!ds_select_dst("1", "4"))

        {

                send_reply("404", "No destination");

                exit;

        }

#       xlog("L_DBG", "--- SCRIPT: going to <$ru> via <$du>\n");

        t_on_failure("RTF_DISPATCH");

        return;

}

# Sample failure route

failure_route[RTF_DISPATCH] {

        if (t_is_canceled()) {

                exit;

        }

        # next DST - only for 500 or local timeout

        if (t_check_status("500") or (t_branch_timeout() and !t_branch_replied()))

        {

                if(ds_next_dst())

                {

                        t_on_failure("DISPATCH");

                        route(RELAY);

                        exit;

                }

        }

}

route[RELAY] {

if (!t_relay()) {

                send_reply("503", "LB01 - All Circuits Are Busy");

#               sl_reply_error();

        }

        exit;

}

I am very new to kamailio and still learning my way around. Any help you can provide with be fantastic!

Thank you,

Joe Watson

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