receipt of 3xx or REFER and where the device handles the requests locally (instead of
forwarding the 3xx or REFER to the destination).
Least cost routing (LCR): If the LCR feature is enabled, the device searches the
routing table for matching routing rules and then selects the one with the lowest call
cost. The call cost of the routing rule is done by assigning it a Cost Group. For
configuring Cost Groups, see 'Least Cost Routing' on page
195. If two routing rules
have identical costs, then the rule appearing higher up in the table (i.e., first-matched
rule) is used. If a selected route is unavailable, the device uses the next least-cost
routing rule. However, even if a matched rule is not assigned a Cost Group, the device
can select it as the preferred route over other matched routing rules with Cost Groups,
according to the settings of the LCR parameter, LCRDefaultCost (see 'Enabling LCR
and Configuring Default LCR' on page 197).
Note: The IP-to-IP Routing table can also be configured using the table ini file
parameter, IP2IPRouting (see 'SBC Parameters' on page 968)
command, configure voip > sbc routing ip2ip-routing.
To configure SBC IP-to-IP routing rules:
1. Open the IP-to-IP Routing Table page (Configuration tab > VoIP menu > SBC
submenu > Routing SBC submenu > IP to IP Routing Table).
2. Click the Add button; the following dialog box appears:
Figure 31-9: IP-to-IP Routing Table - Add Record Dialog Box
3. Configure the rule as required. For a description of the parameters, see the table
below.
4. Click Submit.
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