Version 7.2 719 Mediant 1000B Gateway & E-SBC
User's Manual 34. Routing SBC
Parameter Description
call connect cost + (minute cost * average call duration).
The valid value is 0-65533. The default is 1.
For example, assume the following Cost Groups:
"Weekend A": call connection cost is 1 and charge per
minute is 6. Therefore, a call of 1 minute cost 7 units.
"Weekend B": call connection cost is 6 and charge per
minute is 1. Therefore, a call of 1 minute cost 7 units.
Therefore, for calls under one minute, "Weekend A" carries
the lower cost. However, if the average call duration is more
than one minute, "Weekend B" carries the lower cost.
34.5 Configuring IP Group Sets
The IP Group Set table lets you configure up to 51 IP Group Sets. An IP Group Set is a
group of IP Groups used for load balancing of calls, belonging to the same source, to a call
destination (i.e., IP Group). Each IP Group Set can include up to five IP Groups (Server-
type and/or Gateway-type only). The chosen destination IP Group for each call depends on
the configured load-balancing policy, which can be Round Robin, Random Weights, or
Homing (for more information, see the table's description, later in this section).
Alternative routing within the IP Group Set is also supported, whereby if a chosen
destination IP Group responds with a reject response that is configured as a reason for
alternative routing (see Configuring SIP Response Codes for Alternative Routing Reasons
on page 713) or doesn't respond at all (i.e., keep-alive with its' associated Proxy Set fails),
the device attempts to send the call to another IP Group in the IP Group Set (according to
the load-balancing policy). For enabling Proxy Set keep-alive, see Configuring Proxy Sets
on page 367.
An example of round-robin load-balancing and alternative routing: The first call is sent to IP
Group #1 in the IP Group Set, the second call to IP Group #2, and the third call to IP Group
#3. If the call sent to IP Group #1 is rejected, the device employs alternative routing and
sends it to IP Group #4.
Once you have configured your IP Group Set, to implement call load-balancing by IP
Groups, do one of the following:
In the IP-to-IP Routing table, configure the routing rule's 'Destination Type' parameter
to IP Group Set, and then assign it the IP Group Set in the 'IP Group Set' parameter.
If you are routing to IP Groups based on Dial Plan tags:
• In the IP Group Set table (see below), specify the tag name.
• In the IP-to-IP Routing table, configure the routing rule's 'Destination Type'
parameter to Destination Tag, and then specify the tag name in the 'Routing Tag
Name' parameter.
For more information on IP-to-IP Routing rules, see Configuring SBC IP-to-IP Routing
Rules on page 695. For more information on routing based on destination Dial Plan tags,
see Using Dial Plan Tags for Routing Destinations on page 745.
IP Group Sets are configured using two tables with parent-child type relationship:
Parent table: IP Group Set table, which defines the name and load-balancing policy
of the IP Group Set.
Child table: IP Group Set Member table, which assigns IP Groups to IP Group Sets.
You can assign up to five IP Groups per IP Group Set.
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