
Configuration Note 4. Configuring the Device
Version 6.6 23 September 2013
4.3 Step 3: Configuring SRDs
This step describes how to configure Signaling Routing Domains (SRDs). An SRD is a set
of definitions comprising IP interfaces, SBC resources, SIP behaviors, and Media Realms.
4.3.1 Configuring Media Realms
A Media Realm represents a set of ports, associated with an IP interface, used by the SBC
entity and the Gateway entity to transmit or receive media (RTP or SRTP). Media Realms
are associated with SRDs or IP Groups.
The simplest way is to configure one Media Realm for internal (LAN) traffic as shown below
(applied to the example scenario).
To configure Media Realms:
1. Open the Media Realm Table page (Configuration tab > VoIP > Media > Media
Realm Configuration).
2. Add a Media Realm for the LAN traffic.
a. Click Add.
b. Configure like this:
Parameter Example Setting
Index 0
Media Realm Name MRLan (an arbitrary name)
IPv4 Interface Name Voice (the interface name)
IPv6 Interface Name IP6Voice (the interface name).
Note: Only applicable if using IPv6.
Port Range Start 6000 (a number representing the lowest UDP port
number to be used for media on the LAN)
Number of Media Session
Legs
10 (the number of media sessions assigned with the
port range)
Figure 4-4: Configuring a LAN Media Realm
c. Click Submit.
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