Configuring Media Realm Extensions

The Media Realm Extension table lets you configure up to 24 Media Realm Extensions. A Media Realm Extension is associated with a specific Media Realm and defines a port range and the number of media sessions for a specific Media-type network interface (configured in the IP Interfaces table). Therefore, a Media Realm Extension enhances a Media Realm by allowing you to define different port ranges, media sessions, and network interface than is defined by the associated Media Realm (i.e., the Media Realm is distributed across multiple interfaces).

Media Realm Extensions can be useful, for example, to overcome limitations of the maximum number of media ports supported per interface. Instead of configuring only a single Media Realm in the Media Realms table (see Configuring Media Realms), you can also configure additional "Media Realms" in the Media Realm Extensions table associated with the single Media Realm. An IP Group that is associated with a Media Realm configured with Media Realm Extensions, allocates its media sessions / ports between the different interfaces, as configured by the Media Real and its associated Media Realm Extensions. For example, two Media Realm Extensions could be configured, whereby one allocates 25 media sessions on interface "LAN-1" and another, 10 sessions on interface "LAN-2". The Media Realm associated with these Media Realm Extensions would be assigned to the relevant IP Group.

The following procedure describes how to configure Media Realm Extensions through the Web interface. You can also configure it through ini file [MediaRealmExtension] or CLI (configure voip > voip-network realm-extension).

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To configure a Media Realm Extension:

1.

Open the Media Realms table (see Configuring Media Realms).

2.

Select the Media Realm for which you want to add Remote Media Extensions, and then click the Media Realm Extension link located below the table; the Media Realm Extension table appears.

3.

Click New; the following dialog box appears:

4.

Configure the Media Realm Extension according to the parameters described in the table below.

5.

Click Apply.

Media Realm Extension Table Parameter Descriptions

Parameter	Description
'Index' [MediaRealmExtension_ExtensionIndex]	Defines an index number for the new table row. Note: Each row must be configured with a unique index.
'IPv4 Interface Name' [MediaRealmExtension_IPv4IF]	Assigns an IPv4 network interface (configured in the IP Interfaces table) to the Media Realm Extension. By default, no value is defined. To configure IP network interfaces, see Configuring IP Network Interfaces. Note: ■ The parameter is mandatory. ■ You must configure the Media Realm Extension with an IP network interface that has the same IP version(s) as the Media Realm to which the Media Realm Extension is associated. If the associated Media Realm is assigned both an IPv4 and IPv6 network interface, you also need to assign the Media Realm Extension with both an IPv4 and IPv6 network interface. For example, if the associated Media Realm is assigned only an IPv4 network interface, you also need to assign the Media Realm Extension with an IPv4 network interface.
'IPv6 Interface Name' [MediaRealmExtension_IPv6IF]	Assigns an IPv6 network interface (configured in the IP Interfaces table) to the Media Realm Extension. By default, no value is defined. Note: ■ The parameter is mandatory. ■ You must configure the Media Realm Extension with an IP network interface that has the same IP version(s) as the Media Realm to which the Media Realm Extension is associated. If the associated Media Realm is assigned both an IPv4 and IPv6 network interface, you also need to assign the Media Realm Extension with both an IPv4 and IPv6 network interface. For example, if the associated Media Realm is assigned an IPv6 network interface, you also need to assign the Media Realm Extension with an IPv6 network interface.
'Port Range Start' [MediaRealmExtension_PortRangeStart]	Defines the first (lower) port in the range of media UDP ports for the Media Realm Extension. By default, no value is defined. Notes: ■ You must either configure all your Media Realms with port ranges or all without; not some with and some without. ■ The available UDP port range is according to the [BaseUDPport] parameter (see Configuring RTP Base UDP Port). ■ The port range must not overlap with any other media port range configured for other Media Realm Extensions, Media Realms, or SIP Interfaces that are associated with the same IP network interface.
'Port Range End' [MediaRealmExtension_PortRangeEnd]	Defines the last (upper) port in the range of media UDP ports for the Media Realm Extension. Note: It is unnecessary to configure the parameter. The device automatically populates the parameter with a value, calculated by the summation of the 'Number of Media Session Legs' parameter (multiplied by the port chunk size) and the 'Port Range Start' parameter. After you have added the Media Realm Extension row to the table, the parameter is displayed with the calculated value.
'Number Of Media Session Legs' [MediaRealmExtension_MediaSessionLeg]	Defines the number of media sessions for the port range. For example, 100 ports correspond to 10 media sessions, since ports are allocated in chunks of 10. By default, no value is defined. Note: The parameter is mandatory.