About Me
Cisco Certified Internetwork Expert (CCIE) - Collaboration
1 Infrastructure and Services
1-1 Collaboration Infrastructure
1-1 1 Collaboration Architecture
1-1 2 Collaboration Deployment Models
1-1 3 Collaboration Security
1-1 4 Collaboration Management
1-1 5 Collaboration Monitoring
1-2 Collaboration Services
1-2 1 Voice Services
1-2 2 Video Services
1-2 3 Messaging Services
1-2 4 Conferencing Services
1-2 5 Contact Center Services
2 Cisco Unified Communications Manager (CUCM)
2-1 CUCM Architecture
2-1 1 CUCM Components
2-1 2 CUCM Deployment Models
2-1 3 CUCM High Availability
2-1 4 CUCM Scalability
2-2 CUCM Administration
2-2 1 CUCM Installation and Configuration
2-2 2 CUCM User Management
2-2 3 CUCM Device Management
2-2 4 CUCM Call Routing
2-2 5 CUCM Media Resources
2-3 CUCM Advanced Features
2-3 1 CUCM Unified Mobility
2-3 2 CUCM Unified CMIM
2-3 3 CUCM Unified Emergency Services
2-3 4 CUCM Unified Presence
2-3 5 CUCM Unified Unified CMIM
3 Cisco Unity Connection
3-1 Unity Connection Architecture
3-1 1 Unity Connection Components
3-1 2 Unity Connection Deployment Models
3-1 3 Unity Connection High Availability
3-1 4 Unity Connection Scalability
3-2 Unity Connection Administration
3-2 1 Unity Connection Installation and Configuration
3-2 2 Unity Connection User Management
3-2 3 Unity Connection Call Routing
3-2 4 Unity Connection Media Resources
3-2 5 Unity Connection Unified Messaging
3-3 Unity Connection Advanced Features
3-3 1 Unity Connection Unified Mobility
3-3 2 Unity Connection Unified CMIM
3-3 3 Unity Connection Unified Emergency Services
3-3 4 Unity Connection Unified Presence
3-3 5 Unity Connection Unified Unified CMIM
4 Cisco Unified Contact Center Enterprise (UCCE)
4-1 UCCE Architecture
4-1 1 UCCE Components
4-1 2 UCCE Deployment Models
4-1 3 UCCE High Availability
4-1 4 UCCE Scalability
4-2 UCCE Administration
4-2 1 UCCE Installation and Configuration
4-2 2 UCCE User Management
4-2 3 UCCE Call Routing
4-2 4 UCCE Media Resources
4-2 5 UCCE Unified Messaging
4-3 UCCE Advanced Features
4-3 1 UCCE Unified Mobility
4-3 2 UCCE Unified CMIM
4-3 3 UCCE Unified Emergency Services
4-3 4 UCCE Unified Presence
4-3 5 UCCE Unified Unified CMIM
5 Cisco TelePresence
5-1 TelePresence Architecture
5-1 1 TelePresence Components
5-1 2 TelePresence Deployment Models
5-1 3 TelePresence High Availability
5-1 4 TelePresence Scalability
5-2 TelePresence Administration
5-2 1 TelePresence Installation and Configuration
5-2 2 TelePresence User Management
5-2 3 TelePresence Call Routing
5-2 4 TelePresence Media Resources
5-2 5 TelePresence Unified Messaging
5-3 TelePresence Advanced Features
5-3 1 TelePresence Unified Mobility
5-3 2 TelePresence Unified CMIM
5-3 3 TelePresence Unified Emergency Services
5-3 4 TelePresence Unified Presence
5-3 5 TelePresence Unified Unified CMIM
6 Cisco Webex
6-1 Webex Architecture
6-1 1 Webex Components
6-1 2 Webex Deployment Models
6-1 3 Webex High Availability
6-1 4 Webex Scalability
6-2 Webex Administration
6-2 1 Webex Installation and Configuration
6-2 2 Webex User Management
6-2 3 Webex Call Routing
6-2 4 Webex Media Resources
6-2 5 Webex Unified Messaging
6-3 Webex Advanced Features
6-3 1 Webex Unified Mobility
6-3 2 Webex Unified CMIM
6-3 3 Webex Unified Emergency Services
6-3 4 Webex Unified Presence
6-3 5 Webex Unified Unified CMIM
7 Cisco Collaboration Endpoints
7-1 Collaboration Endpoints Architecture
7-1 1 Collaboration Endpoints Components
7-1 2 Collaboration Endpoints Deployment Models
7-1 3 Collaboration Endpoints High Availability
7-1 4 Collaboration Endpoints Scalability
7-2 Collaboration Endpoints Administration
7-2 1 Collaboration Endpoints Installation and Configuration
7-2 2 Collaboration Endpoints User Management
7-2 3 Collaboration Endpoints Call Routing
7-2 4 Collaboration Endpoints Media Resources
7-2 5 Collaboration Endpoints Unified Messaging
7-3 Collaboration Endpoints Advanced Features
7-3 1 Collaboration Endpoints Unified Mobility
7-3 2 Collaboration Endpoints Unified CMIM
7-3 3 Collaboration Endpoints Unified Emergency Services
7-3 4 Collaboration Endpoints Unified Presence
7-3 5 Collaboration Endpoints Unified Unified CMIM
8 Cisco Collaboration Security
8-1 Collaboration Security Architecture
8-1 1 Collaboration Security Components
8-1 2 Collaboration Security Deployment Models
8-1 3 Collaboration Security High Availability
8-1 4 Collaboration Security Scalability
8-2 Collaboration Security Administration
8-2 1 Collaboration Security Installation and Configuration
8-2 2 Collaboration Security User Management
8-2 3 Collaboration Security Call Routing
8-2 4 Collaboration Security Media Resources
8-2 5 Collaboration Security Unified Messaging
8-3 Collaboration Security Advanced Features
8-3 1 Collaboration Security Unified Mobility
8-3 2 Collaboration Security Unified CMIM
8-3 3 Collaboration Security Unified Emergency Services
8-3 4 Collaboration Security Unified Presence
8-3 5 Collaboration Security Unified Unified CMIM
9 Cisco Collaboration Management
9-1 Collaboration Management Architecture
9-1 1 Collaboration Management Components
9-1 2 Collaboration Management Deployment Models
9-1 3 Collaboration Management High Availability
9-1 4 Collaboration Management Scalability
9-2 Collaboration Management Administration
9-2 1 Collaboration Management Installation and Configuration
9-2 2 Collaboration Management User Management
9-2 3 Collaboration Management Call Routing
9-2 4 Collaboration Management Media Resources
9-2 5 Collaboration Management Unified Messaging
9-3 Collaboration Management Advanced Features
9-3 1 Collaboration Management Unified Mobility
9-3 2 Collaboration Management Unified CMIM
9-3 3 Collaboration Management Unified Emergency Services
9-3 4 Collaboration Management Unified Presence
9-3 5 Collaboration Management Unified Unified CMIM
10 Cisco Collaboration Monitoring
10-1 Collaboration Monitoring Architecture
10-1 1 Collaboration Monitoring Components
10-1 2 Collaboration Monitoring Deployment Models
10-1 3 Collaboration Monitoring High Availability
10-1 4 Collaboration Monitoring Scalability
10-2 Collaboration Monitoring Administration
10-2 1 Collaboration Monitoring Installation and Configuration
10-2 2 Collaboration Monitoring User Management
10-2 3 Collaboration Monitoring Call Routing
10-2 4 Collaboration Monitoring Media Resources
10-2 5 Collaboration Monitoring Unified Messaging
10-3 Collaboration Monitoring Advanced Features
10-3 1 Collaboration Monitoring Unified Mobility
10-3 2 Collaboration Monitoring Unified CMIM
10-3 3 Collaboration Monitoring Unified Emergency Services
10-3 4 Collaboration Monitoring Unified Presence
10-3 5 Collaboration Monitoring Unified Unified CMIM
2.1 CUCM Architecture

2.1 CUCM Architecture

Cisco Unified Communications Manager (CUCM) is the core component of Cisco's Unified Communications system, providing call control and session management for voice, video, and mobility services. Understanding the architecture of CUCM is crucial for designing, deploying, and managing a robust collaboration environment.

Key Concepts

CUCM Nodes

A CUCM node is a single instance of the CUCM application running on a physical or virtual server. Each node is responsible for managing call control, media processing, and user authentication. Multiple nodes can be deployed within a CUCM cluster to provide scalability and redundancy.

Example: In a large enterprise, multiple CUCM nodes are deployed across different data centers to ensure that call control services are available even if one data center goes offline.

CUCM Clusters

A CUCM cluster is a group of CUCM nodes that work together to provide unified call control and session management. Clusters enhance scalability and reliability by distributing the load across multiple nodes. Nodes within a cluster communicate using the Cisco Discovery Protocol (CDP) and the Lightweight Directory Access Protocol (LDAP).

Example: A global organization deploys a CUCM cluster across three continents, ensuring that users can make and receive calls regardless of their physical location.

CUCM Databases

CUCM uses a relational database management system (RDBMS) to store configuration data, user information, and call detail records (CDRs). The primary database is typically Oracle or Microsoft SQL Server. Databases are replicated across nodes within a cluster to ensure data consistency and availability.

Example: In a CUCM cluster with three nodes, the database is replicated across all three nodes, ensuring that if one node fails, the other nodes can continue to operate without data loss.

CUCM Services

CUCM services are the various processes and applications that run on a CUCM node to provide call control, media processing, and other functionalities. Key services include the Cisco CallManager service, which handles call control, and the Cisco TFTP service, which provides configuration files to IP phones.

Example: When a user makes a call, the Cisco CallManager service on the CUCM node processes the call setup, while the Cisco TFTP service ensures that the IP phone receives the necessary configuration files.

CUCM High Availability

CUCM high availability (HA) ensures that the CUCM system remains operational even in the event of hardware or software failures. HA is achieved through redundancy, failover mechanisms, and load balancing. Key HA features include Cisco SRST (Survivable Remote Site Telephony) and Cisco HSRP (Hot Standby Router Protocol).

Example: In a CUCM deployment with HA, if the primary CUCM node fails, the secondary node automatically takes over, ensuring that call services are not interrupted.

Conclusion

Understanding the architecture of CUCM—nodes, clusters, databases, services, and high availability—is essential for designing a scalable, reliable, and efficient collaboration environment. By leveraging these components, organizations can ensure that their communication systems are robust and capable of meeting the demands of modern business.

© 2024 Ahmed Baheeg Khorshid. All rights reserved.