Hi Ali,
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).
Regards,
Bogdan
On 03/27/2012 07:36 PM, Ali Pey wrote:
What are the differences between the Dynamic Routing and Load-Balancer
Modules?
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?
Regards,
Ali
On Fri, Mar 23, 2012 at 9:11 AM, Bogdan-Andrei Iancu
<[email protected] <mailto:[email protected]>> wrote:
Hi all
In OpenSIPS 1.8.0, the Dynamic Module comes with some major
changes and enhancements :
Carrier concept added
----------------------
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.
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.
Ex:
gateways : g1, g2, g3, g4, g5
carriers : c1 = g1=75,g2=25 (a premium carrier), ordering
based on weight
c2 = g3,g4 (a standard carrier), ordering based
on given order
rules: prefix= 004021 ; list = #c1,#c2,g5 - first we will
try do distribute 75/25 the traffic
between the gws from carrier c1 and if all fail,
we will try gws from carrier c2
(according the ordering defined for c2), and so on
prefix= 004072 ; list = #c2=50,g5=50 - all traffic
will be weight balanced between carrier
c2 and gw g5; of course, if carrier c2 is to be
used, the corresponding traffic will
routed over the c2 gateways according to its
definition
do_routing() enhancements
--------------------------
The do_routing() function takes several flags (as second optional
parameter) to control the matching and ordering in the rules:
* /W/ - Instead of using the destination (from the rule
definition) in the given order, sort them based on their
weight.
* /F/ - 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.
* /L/ - Do strict length matching over the prefix - actually
DR engine will do full number matching and not prefix
matching anymore.
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)
Rule fallback
--------------
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.
The fallback is transparent done, via the use_next_gw() function.
Ex:
prefix 004072, prio 10 => g1,g2
prefix 004072, prio 1 => g3
prefix 0040, prio 1 => g4,g5
when dialing 00407221234567 and using fallback, the gws g1, g2
(first rule), g3 (second rule) and g4 , g5 (third rule) will be used.
New routing functions
----------------------
route_to_gw(gw_id) - function to trigger the direct routing to a
given gateway. Attributes and per-gw preocessing will be available.
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)
For more, please see the online documentation for the DR module:
www.opensips.org/html/docs/modules/1.8.x/drouting.html
<http://www.opensips.org/html/docs/modules/1.8.x/drouting.html>
Regards,
Bogdan
--
Bogdan-Andrei Iancu
OpenSIPS Founder and Developer
http://www.opensips-solutions.com
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--
Bogdan-Andrei Iancu
OpenSIPS Founder and Developer
http://www.opensips-solutions.com
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