для Cisco Cisco Customer Voice Portal 8.0(1)

Load-balancing SIP Calls

SIP calls can be load balanced across destinations in several different ways as outlined below:

•

Using the CUPS proxy server, define several static routes with the same route pattern and
priorities and weights.

•

Using DNS, configure SRV records with priorities and weights. Both the DNS client and the
server settings must be configured and operating successfully for DNS "A" and "SRV" type
queries to work. Configure SRV queries to be used wherever outbound SIP calls are made,
such as on the IOS Ingress gateway, on the Call Server itself, and on Unified CM.

Note: See the 

 section in Chapter 2, "Configuration

Overview," in Part 1 for information about load balancing and failover without a Proxy Server.
Only the DNS SRV method is supported for load balancing and failover without a Proxy Server.
The following screen shot example displays this configuration in the Operations Console:

Figure 33: DNS SRV Method for Load Balancing and Failover without a Proxy Server

How to Set Up the Ingress Gateway to Use Redundant Proxy Servers

Configure the gateway with the following to send calls to redundant proxy servers as resolved
using DNS SRV lookup:

ip domain name <your domain name>

ip name-server <your DNS server>

sip-ua

sip-server dns:<your SRV cluster domain name>

dial-peer voice 1000 voip

session target sip-server

How to Set Up the Unified CVP Call Server with Redundant Proxy Servers

The Device Management SIP proxy server section in the Operations Console does not currently
allow the SRV cluster domain name to be configured as an outbound proxy server, since this
by itself does not have an IP address.

Configuration and Administration Guide for Cisco Unified Customer Voice Portal Release 4.1(1)