Thank you for the tip, Ben.
Do you by chance have a script snipped for this scenario?
For some reason, the drouting part:
if (!do_routing(0,"F")) {
xlog("DRoute GATEWAY: Failed. source:$si -$fU -> $rU\n");
send_reply(500, "No Gateway to Route found");
exit;
}
xlog("Before Entering Relay\n CarrierID_avp: $avp(carrier_id), GW ID
avp: $avp(gw_id)");
route(relay);
Both AVPs return a single value instead of the a list for me, so I must be
missing something.
Thanks.
---- On Wed, 29 Apr 2020 14:50:38 -0400 Ben Newlin
<mailto:[email protected]> wrote ----
We also had a need to do this and did not find a way to do it via drouting
directly, but it will work with drouting with a little help.
First, we specify the carrier_id_avp param [1]. After we call do_routing, we
copy out the carrier IDs from that avp into our own AVP. Then we use
route_to_carrier [2] for each carrier ID in the list. To continue routing
within the carrier,
you can still do use_next_gw. When that returns false (no more gateways), or
if you want to skip to the next carrier you just call route_to_carrier again
with the next ID in your list.
This solved two problem for us:
* allows us to fail over by carrier instead of just by gateway
* allows us to call do_routing multiple times for a call with different groups
and aggregate the results
[1] - https://opensips.org/docs/modules/3.0.x/drouting.html#param_carrier_id_avp
[2] -
https://opensips.org/docs/modules/3.0.x/drouting.html#func_route_to_carrier
Ben Newlin
From: Users <mailto:[email protected]> on behalf of Alex A
<mailto:[email protected]>
Reply-To: OpenSIPS users mailling list <mailto:[email protected]>
Date: Wednesday, April 29, 2020 at 2:40 PM
To: users <mailto:[email protected]>
Subject: [OpenSIPS-Users] Drouting failover by carrier only
Hi Everyone,
Is it possible to failover to next carrier (instead next gateway) while using
drouting?
I got the below to work; however currently, use_next_gw gets the next gateway
in the list, so
if gwlist= #0,#3
and one of the carriers has multiple gateway IPs, the retry happens many times
to the same carrier:
route[droute] {
xlog("DRoute GATEWAY: source:$si - $fU -> $rU\n");
if (!do_routing(0,"F")) {
xlog("DRoute GATEWAY: Failed. source:$si -$fU -> $rU\n");
send_reply(500, "No Gateway to Route found");
exit;
}
route(relay);
exit;
}
route[relay] {
if (is_method("INVITE")) {
t_on_failure("missed_call");
}
if (!t_relay()) {
if (use_next_gw()) {
xlog("L_INFO","Next Gateway: From=$fu, To=$tu,RU=$ru,
CI=$ci IP=$si\n");
t_on_failure("missed_call");
route(relay);
exit;
}
else {
send_reply(503, "Service not available, no more gws");
exit;
}
};
exit;
}
failure_route[missed_call] {
#if (use_next_gw(, , $var(carrier_attrs))) {
if (use_next_gw(, $avp(gw_id),$avp(carrier_id))) {
xlog("MissedCall--Next Gateway: From=$fu, To=$tu,RU=$ru,
CI=$ci IP=$si\n");
xlog("Carrier attributes of current gateway: $avp(gw_id).
carrier: $avp(carrier_id)\n");
t_on_failure("missed_call");
route(relay);
exit;
}
else {
send_reply(503, "Service not available, no more gws");
exit;
}
Thank you.
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