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Hi Ali,<br>
<br>
Both modules are routing engines - the DR module routes based on
dialled prefix, while the LB routes based on the load of the
destinations (active calls).<br>
<br>
Regards,<br>
Bogdan<br>
<br>
On 03/27/2012 07:36 PM, Ali Pey wrote:
<blockquote
cite="mid:CA+q4kRJzWmtK8ZpfnnbcXJJyrXY6Sv4dGSLAQpFgtUmNNnuzvQ@mail.gmail.com"
type="cite">
<div><br>
</div>
What are the differences between the Dynamic Routing and
Load-Balancer Modules?
<div><br>
</div>
<div>They seem very similar except that we don't have rules in
Load-Balancer Module. Can DR module be used as a load-balancer?
Is it possible to have the features of both modules together? A
load-balancer with rules?</div>
<div><br>
</div>
<div><br>
</div>
<div>Regards,</div>
<div>Ali<br>
<div><br>
</div>
<div><br>
<br>
<div class="gmail_quote">On Fri, Mar 23, 2012 at 9:11 AM,
Bogdan-Andrei Iancu <span dir="ltr"><<a
moz-do-not-send="true" href="mailto:bogdan@opensips.org">bogdan@opensips.org</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt
0.8ex; border-left: 1px solid rgb(204, 204, 204);
padding-left: 1ex;">
<div bgcolor="#ffffff" text="#000000"> <tt>Hi all<br>
<br>
In OpenSIPS 1.8.0, the Dynamic Module comes with some
major changes and enhancements :<br>
<br>
Carrier concept added<br>
----------------------<br>
Now you can group the GWs in carrier, so you can
achieve a better control over the destinations. A
carrier is a list of gws - for each carrier, you can
define how the gws should be sort - based on the
definition order, or based on weigths . Once again,
this setting is per carrier. Also you can enabled /
disable carriers (via MI) during runtime. The carrier
has attached an attribute string that will be pushed
to script when a gws from the carrier will be used.<br>
<br>
When defining a routing rule, you can define a list of
gws and carriers to be used (a mixed list). How the
list from the rule is interpreted (order or weight),
depends on a flag in do_routing() function.<br>
<br>
Ex:<br>
gateways : g1, g2, g3, g4, g5<br>
carriers : c1 = g1=75,g2=25 (a premium carrier),
ordering based on weight<br>
c2 = </tt><tt>g3,g4 (a standard
carrier), ordering based on given order<br>
rules: prefix= 004021 ; list = #c1,#c2,g5 -
first we will try do distribute 75/25 the traffic <br>
between the gws from carrier c1 and
if all fail, we will try gws from carrier c2<br>
(according the ordering defined for
c2), and so on<br>
<br>
</tt><tt> prefix= 004072 ; list =
#c2=50,g5=50 - all traffic will be weight balanced
between carrier<br>
c2 and gw g5; of course, if carrier
c2 is to be used, the corresponding traffic will<br>
routed over the c2 gateways
according to its definition<br>
</tt><br>
<tt><br>
do_routing() enhancements</tt><tt><br>
--------------------------<br>
The do_routing() function takes several flags (as
second optional parameter) to control the matching and
ordering in the rules:<br>
</tt>
<div>
<ul type="circle">
<li><tt><span><em>W</em></span> - Instead of using
the destination (from the rule definition) in
the given order, sort them based on their
weight. </tt></li>
<li><tt><span><em>F</em></span> - Enable rule
fallback; normally the engine is using a single
rule for routing a call; by setting this flag,
the engine will fallback and use rules with less
priority or shorter prefix when all the
destination from the current rules failed. </tt></li>
<li><tt><span><em>L</em></span> - Do strict length
matching over the prefix - actually DR engine
will do full number matching and not prefix
matching anymore. </tt></li>
</ul>
</div>
<tt>Also, the function takes a new third optional
parameter - a white list of gateways -> during the
routing, only the gateways from this list will be
considered valid (from the gws specified by the
routing rules)<br>
</tt><tt><br>
<br>
Rule fallback<br>
--------------<br>
Before, the dr module was matching and using a single
rule. Now, via the F flag, you can instruct the DR
engine to fallback and use additional rules that match
(with looser matching) the dialed prefix - like rules
with same prefix but lower priority, rules with
shorter prefix.<br>
The fallback is transparent done, via the
use_next_gw() function.<br>
<br>
Ex:<br>
prefix 004072, prio 10 => g1,g2<br>
</tt><tt> </tt><tt> prefix 004072, prio 1 => g3<br>
</tt><tt> prefix 0040, prio 1 => g4,g5<br>
<br>
when dialing 00407221234567 and using fallback, the
gws g1, g2 (first rule), g3 (second rule) and g4 , g5
(third rule) will be used.<br>
<br>
</tt><br>
<tt>New routing functions<br>
----------------------<br>
route_to_gw(gw_id) - function to trigger the direct
routing to a given gateway. Attributes and per-gw
preocessing will be available.<br>
<br>
route_to_carrier(carrier_id) -f unction to trigger the
direct routing to a given carrier. In this case the
routing is not done prefix based, but carrier based
(call will be sent to the GWs of that carrier, based
on carrier policy)<br>
</tt><tt><br>
<br>
<br>
For more, please see the online documentation for the
DR module:<br>
<a moz-do-not-send="true"
href="http://www.opensips.org/html/docs/modules/1.8.x/drouting.html"
target="_blank">www.opensips.org/html/docs/modules/1.8.x/drouting.html</a><br>
<br>
<br>
Regards,<br>
Bogdan<span class="HOEnZb"><font color="#888888"><br>
</font></span></tt><span class="HOEnZb"><font
color="#888888">
<pre cols="72">--
Bogdan-Andrei Iancu
OpenSIPS Founder and Developer
<a moz-do-not-send="true" href="http://www.opensips-solutions.com" target="_blank">http://www.opensips-solutions.com</a></pre>
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<pre class="moz-signature" cols="72">--
Bogdan-Andrei Iancu
OpenSIPS Founder and Developer
<a class="moz-txt-link-freetext" href="http://www.opensips-solutions.com">http://www.opensips-solutions.com</a></pre>
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