Unified Border Element- High Availability Configuration Release 9.0(1)
Applicable to UC System Release 9.0(1)
This page provides configuration information for Cisco Unified Border Element (Unified Border Element) in High-Availability mode deployment in Contact Center.
The intended audience should be able to perform system-level configuration of Cisco Unified Communications components and deployments and be familiar with the Cisco Unified Communications solution.
The configuration information is based primarily on system testing performed in the Contact Center Solution environment during Cisco Unified Communication System Release 9.0(1) testing. TIP: Search for related test cases in System Test Results for Contact Center.
This topic does not contain detailed step-by-step procedures; for detailed information about installing, configuring, and administering the Unified Border Element, refer to Unified Border Element documentation. For detailed configuration information refer to Cisco Unified Border Element High Availability (HA) Using HSRP Configuration Example.
For information on specific deployments and sites where Unified Border Element in High-Availability mode system testing was performed, see Unified CCE with Unified CVP Post-Routed Call Flow, Local and Remote Agents test bed (Test Bed 1) in Tested Deployments and Site Models.
This section provides information about the Unified Border Element in High-Availability deployment in the System Validation Contact Center Solution Integration Test bed. During Cisco Unified Communications system testing, various components including Unified Border Element, Unified CCE, and Unified CVP were installed and tested in multiple sites in the System Verification test environment.
As shown in Figure 1 Unified Border Elements (both Active and Standby) are placed in the Data Center A and Data Center B respectively. The Unified Border Element provides high availability via box-to-box redundancy configurations implemented on a Cisco Integrated Services Generation 2 Router (ISR G2) platform. Unified Border Element box-to-box redundancy leverages available router-based Hot Standby Routing Protocol (HSRP) router technology.
Bidirectional redundancy is achieved on Unified CCE/Unified CVP and Service Provider Sides via floating IP address configuration on both sides.
The Unified Border Element box-to-box redundancy High-Availability implementation supports media preservation over an HSRP switchover of SIP to SIP calls. Call signaling preservation is also supported in the latest Cisco IOS Software release 15.2(3)T1.
A SIP trunk was created from each Unified Border Element (i.e from Active and Stand-by) to Unified CVP. Similarly from a Unified CVP a SIP trunk was created to a floating IP of a Unified Border Element (i.e. common IP address which points to an active Unified Border Element).
A dial-peers on a Unified Border Element was created to accept the IP calls from IP PSTN Service Providers and as well dial-peers to route calls to a Unified CVP.
Call Flow Diagrams
This section provides examples of call flows in various Unified Border Element High-Availability scenarios.
Figure 2: Basic IP PSTN call to Unified CCE/CVP solution via Unified Border Element
Figure 3: Hold call in Unified Border Element High-Availability Mode
Figure 4: Retrieve call in Unified Border Element High-Availability Mode
Figure 5: REFER Consumption Modes
This section provides the high-level tasks and related information for configuring a Unified Border Element in High Availability mode deployment in a Contact Center.
The following table provides this information:
- Configuration Tasks: List of high-level configuration tasks.
- System Test Specifics: System test variations from procedures and settings documented in the product documentation.
- More Information: Links to product documentation for detailed configuration information related to the high-level tasks.
NOTE: Default and recommended values specified in the product documentation were used during system testing, unless otherwise noted in the ‘’’System Test Specifics’’’ column.
Table 1: Configuration
|Configuration Tasks||System Test Specifics||More Information|
|1. Configure the Unified Border Element in High Availability.||See|
|2. Configure dial-pattern and trunk creation from Unified CVP to Unified Border Element and vice versa||See|
|3. Configure Unified Border Element with Cisco Unified Communications Manager (Unified CM)||See|
|4. Configure Support for Dynamic Refer Handling on Unified Border Element configuration guide||See|
|5. Configure Cisco UBE Out-of-dialog OPTIONS Ping for Specified SIP Servers or Endpoints.||See|
- For component installation and configuration documents see
- For information on the results obtained from the system testing, see
- For information on configuring the security components, see
- For information on the IOS commands used to configure infrastructure components, see