User's Manual 702 Document #: LTRT-10632
Mediant 800B Gateway & E-SBC
3. Click Apply.
If the parameter is set to Allow, the incoming SIP dialog is assigned to an IP Group as
follows:
1. The device determines on which SIP listening port (e.g., 5061) the incoming SIP
dialog request was received and the SIP Interface configured with this port (in the SIP
Interfaces table).
2. The device determines the SRD associated with this SIP Interface (in the SIP
Interfaces table) and then classifies the SIP dialog to the first IP Group in the IP
Groups table that is associated with the SRD. For example, if IP Groups 3 and 4
belong to the same SRD, the device classifies the call to IP Group 3.
Note: If classification of a SIP request fails and the device is configured to reject
unclassified calls, the device can send a specific S
Interface. This is configured by the 'Classification Failure Response Type' parameter
in the SIP Interfaces table (see 'Configuring SIP Interfaces' on page 357).
The Classification table is used to classify incoming SIP dialog requests only if the
following classification stages fail:
1. Classification Stage 1 - Based on User Registration Database: The device
searches its users registration database to check whether the incoming SIP dialog
arrived from a registered user. The device searches the database for a user that
matches the address-of-record (AOR) and Contact of the incoming SIP message:
• Compares the SIP Contact header to the contact value in the database.
• Compares the URL in the SIP P-Asserted-Identity/From header to the registered
AOR in the database.
If the device finds a matching registered user, it classifies the user to the IP Group
associated with the user in the database. If this classification stage fails, the device
proceeds to classification based on Proxy Set.
2. Classification Stage 2 - Based on Proxy Set: If the database search fails, the
device performs classification based on Proxy Set. This classification is applicable
only to Server-type IP Groups and is done only if classification based on Proxy Set is
enabled (see the 'Classify By Proxy Set' parameter in the IP Groups table in
'Configuring IP Groups' on page 365). The device checks whether the incoming
INVITE's IP address (if host name, then according to the dynamically resolved IP
address list) is configured for a Proxy Set (in the Proxy Sets table). If such a Proxy Set
exists, the device classifies the INVITE to the IP Group that is associated with the
Proxy Set. The Proxy Set is assigned to the IP Group in the IP Groups table.
If more than one Proxy Set is configured with the same IP address and associated
with the same SIP Interface, the device may classify and route the SIP dialog to an
incorrect IP Group. In such a scenario, a warning is generated in the Syslog message.
However, if some Proxy Sets are configured with the same IP address but different
ports (e.g., 10.1.1.1:5060 and 10.1.1.1:5070) and the 'Classification Input' parameter
is configured to IP Address, Port & Transport Type, classification (based on IP
address and port combination) to the correct IP Group is achieved. Therefore, when
classification is by Proxy Set, pay attention to the configured IP addresses and the
'Classification Input' parameter of your Proxy Sets. When more than one Proxy Set is
configured with the same IP address, the device selects the matching Proxy Set in the
following precedence order:
a. Selects the Proxy Set whose IP address, port, and transport type match the
source of the incoming dialog.
b. If no match is found for a), it selects the Proxy Set whose IP address and
transport type match the source of the incoming dialog (if the 'Classification Input'
parameter is configured to IP Address Only).
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