Version 7.2 709 Mediant 500L Gateway & E-SBC
User's Manual 35. Routing SBC
35.5 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 703) 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 378.
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 685. For more information on routing based on destination Dial Plan tags,
see Using Dial Plan Tags for Routing Destinations on page 736.
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.
The following procedure describes how to configure IP Group Sets through the Web
interface. You can also configure it through other management platforms:
IP Group Set Table: ini file (IPGroupSet) or CLI (configure voip > sbc routing ip-
group-set)
IP Group Set Member Table: ini file (IPGroupSetMember) or CLI (configure voip >
sbc routing ip-group-set-member)
To configure an IP Group Set:
1. Open the IP Group Set table (Setup menu > Signaling & Media tab > SBC folder >
Routing > IP Group Set).
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