Chapter 55 Configuring a VoIP Network

Configuring VoIP on a Switch

High-Availability Support

To support high availability during a failover from the active supervisor engine to the standby supervisor engine, the per-port power management and phone status information is synchronized between the active and standby supervisor engines.

The information to be synchronized (on a per-port basis) is the presence of a phone, the phone power status (on, off, denied, or faulty), allocated power, device class, device type, device maximum power, and device discovery. The active supervisor engine sends this information to the standby supervisor engine, and the standby supervisor engine updates its internal data structures. When a switchover occurs, the standby supervisor engine allocates the power to the modules and ports from the available power, one module at a time. Once the power for each module has been allocated, the supervisor engine allocates the power to the phones, beginning with the lowest slot number, until all inline powered ports have been either powered on, off, or denied.

Phone Detection Summary

Figure 55-4shows how the system detects a phone that is connected to a Catalyst 6500 series switch port.

Figure 55-4 Power Detection Summary

Catalyst Switch

10/100 module

Cisco phone

Switching module

 

discovers the phone.

10/100 module

Cisco phone

Supervisor engine discovers

or third party phone.

the phone through CDP and/or

 

 

IEEE.

 

 

 

 

 

Wall-power

10/100 module

10/100 module

Third party phone without CDP.

Network

device

Switching module will not discover the phone because CDP is not supported. However, the supervisor engine detects the phone and powers it up.

Phone is inserted but has not booted, then phone is removed. A network device is plugged in. Inline power might damage the network device.

 

 

 

 

Cisco phone

 

 

Network

 

10/100 module

 

 

 

or third party phone

 

 

 

 

device

 

 

 

 

with CDP.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Wall-power

Catalyst 6500 Series Switch Software Configuration Guide—Release 8.7

55-16

Supervisor engine discovers the phone through CDP and/or IEEE.

38205

OL-8978-02

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Cisco Systems OL-8978-02 manual Phone Detection Summary, High-Availability Support, 55-16
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OL-8978-02 specifications

Cisco Systems OL-8978-02 is a comprehensive training curriculum designed to enhance the skills and knowledge of network professionals seeking to advance their careers in network management and security. This curriculum offers a significant focus on Cisco networking technologies and concepts, ensuring that learners are well-equipped to handle the intricacies of modern network environments.

One of the primary features of OL-8978-02 is its in-depth coverage of foundational networking concepts, which are crucial for effective network administration. The curriculum includes detailed modules on networking fundamentals, such as OSI and TCP/IP models, LAN and WAN architectures, and network protocols. This solid foundation enables learners to understand how different networking components interact and function together, forming the backbone of corporate and enterprise environments.

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Another distinguishing characteristic of the OL-8978-02 curriculum is its emphasis on hands-on experience. The program often includes practical labs and simulations, allowing participants to apply theoretical knowledge in real-world scenarios. This experiential learning approach is pivotal for solidifying skills and boosting confidence in network management tasks.

Furthermore, OL-8978-02 addresses the latest advancements in networking technology, including software-defined networking (SDN) and cloud computing. By introducing emerging technologies, this curriculum ensures that professionals remain ahead of the curve, ready to adapt to the future demands of networking.

Finally, Cisco Systems OL-8978-02 positions itself not only as an educational tool but also as a career catalyst, providing learners with skills that are highly sought after in the IT job market. Upon completion, participants often find themselves well-prepared for various Cisco certifications, which can enhance their employability and professional growth opportunities in a competitive landscape. Through its thorough approach, OL-8978-02 plays a vital role in shaping the next generation of network professionals.
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