AudioCodes Mediant 800 MSBG User Manual page 201

SIP User's Manual
Parameter
3.3.2.12.4.2 Configuring SBC IP-to-IP Routing
The 'IP2IP Routing Table' page configures up to 120 SBC IP-to-IP routing rules. This table
provides enhanced IP-to-IP call routing capabilities for routing received SIP dialog
messages (e.g., INVITE) to a destination IP address. The SIP message is routed according
to a routing rule whose configured input characteristics (e.g., Source IP Group) match the
incoming SIP message. If the characteristics of an incoming call does not match the first
rule, the call characteristics is then compared to those of the second rule, and so on until a
matching rule is located. If no rule is matched, the call is rejected.
The IP-to-IP call destination can be one of the following:
Registered user Contact listed in the device's database (only for USER-type IP
Groups).
Proxy Set associated with the destination IP Group (allows redundancy/load
balancing).
Specific destination address (can be based on IP address, host name, port, transport
type, and/or SRD). Routing to a host name can be resolved using NAPTR/SRV/A-
Record.
Incoming Request-URI.
ENUM query.
For all destination types listed above except destination IP Group, the IP Group can
optionally be itself, configured to provide the destination SRD and/or IP Profile. If neither
destination SRD nor destination IP Group are defined, the destination SRD is the source
SRD and the destination IP Group is its default IP Group.
In addition to the alternative routing/load balancing provided by the Proxy Set associated
with the destination IP Group, the table allows the configuration of alternative routes
whereby if a route fails, the next adjacent (below) rule in the table that is configured as 'Alt
Route Ignore/Consider Inputs' are used. The alternative routes rules can be set to enforce
the input matching criteria or to ignore any matching criteria.
Alternative routing occurs upon one of the following conditions:
A request sent by the device is responded with the following:
•
SIP response code (i.e., 4xx, 5xx, and 6xx SIP responses) configured in the SBC
Alternative Routing Reasons table (see ''Configuring Alternative Routing
Reasons'' on page 206).
•
SIP 408 Timeout or no response (after timeout).
The DNS resolution includes IP addresses that the device has yet to try (for the
current call).
Messages are re-routed with the same SIP Call-ID and CSeq header fields (increased
by 1).
Version 6.2
Description
This IP Group is used for SBC routing and manipulations
To define IP Groups, see ''Configuring IP Groups'' on
page 119.
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3. Web-Based Management
February 2011