Cisco Systems Comprehensive Guide to Session Border Controller Configuration for Cisco Routers

C H A P T E R 2

Configuring Integrated Session Border Controller

This chapter describes fundamental configuration tasks required for typical data border element (DBE) deployment of the Integrated Session Border Controller (SBC). The Cisco ASR 1000 Series Aggregation Services Router serves as the DBE. The DBE operates with a Signaling Border Element (SBE), also called a media gateway controller (MGC).

For a complete description of commands used in this chapter, refer to the Cisco IOS Integrated Session Border Controller Command Reference.

Contents

•Prerequisites for Integrated Session Border Controller, page 2-1

•Restrictions for Integrated Session Border Controller, page 2-1

•Configuring Integrated Session Border Controller DBE Deployment, page 2-2

•Configuring H.248 Logging Level, page 2-6

•Configuration Examples, page 2-9

•Cisco H.248 Profile, page 2-14

Prerequisites for Integrated Session Border Controller

When running SBC with 500 or more active calls, ensure you configure the huge buffer size to 65535 bytes with the buffer huge size 65535 command. The increased buffer size is required because by default Cisco IOS software sets the “huge” buffer size to be 18084 bytes, which is not large enough for H.248 audit responses when there are more than 500 active calls.

Restrictions for Integrated Session Border Controller

The following are not supported by the SBC function on the Cisco ASR 1000 Series Routers:

•Signaling Border Element (SBE) function and SBE CLIs

•Virtual Routing and Forwarding (VRF) and VRF-Lite

•Digital signal processing (DSP)

•Network management system (NMS) configuration

Cisco IOS XE Integrated Session Border Controller Configuration Guide for the Cisco ASR 1000 Series Aggregation Services Routers

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