User's Manual 346 Document #: LTRT-10532
Mediant 500L Gateway & E-SBC
Therefore, when employing a single-SRD configuration topology, there is no need to
handle SRD configuration (i.e., transparent).
SRDs are associated with the following configuration entities:
SIP Interface (mandatory) - see ''Configuring SIP Interfaces'' on page 355
IP Group (mandatory) - see ''Configuring IP Groups'' on page 363
Proxy Set (mandatory) - see ''Configuring Proxy Sets'' on page 378
(SBC application only) Admission Control rule - see Configuring Admission Control
Table on page
673
(SBC application only) Classification rule - see Configuring Classification Rules on
page
677
As mentioned previously, if you use only a single SRD, the device automatically assigns it
to the above-listed configuration entities.
As each SIP Interface defines a different Layer-3 network (see ''Configuring SIP Interfaces''
on page 355 for more information) on which to route or receive calls and as you can assign
multiple SIP Interfaces to the same SRD, for most deployment scenarios (even for multiple
Layer-3 network environments), you only need to employ a single SRD to represent your
VoIP network (Layer 5). For example, if your VoIP deployment consists of an Enterprise IP
PBX (LAN), a SIP Trunk (WAN), and far-end users (WAN), you would only need a single
SRD. The single SRD would be assigned to three different SIP Interfaces, where each SIP
Interface would represent a specific Layer-3 network (IP PBX, SIP Trunk, or far-end users)
in your environment. The following figure provides an example of such a deployment:
Figure 17-6: Deployment using a Single SRD