© 2006 Cisco Systems, Inc. All rights reserved. BCMSNv3.07-1 Configuring Campus Switches to Support Voice Planning for Implementation of Voice in a Campus. - презентация

1 © 2006 Cisco Systems, Inc. All rights reserved. BCMSNv Configuring Campus Switches to Support Voice Planning for Implementation of Voice in a Campus Network

2 © 2006 Cisco Systems, Inc. All rights reserved. BCMSN v Benefits of a Converged Network More efficient use of bandwidth and equipment Lower transmission costs Consolidated network expenses Increased revenue from new services Service innovation Access to new communications devices Flexible new pricing structures

3 © 2006 Cisco Systems, Inc. All rights reserved. BCMSN v Describing VoIP Network Components

4 © 2006 Cisco Systems, Inc. All rights reserved. BCMSN v Characteristics of Voice and Data

5 © 2006 Cisco Systems, Inc. All rights reserved. BCMSN v Describing VoIP Call Flow

6 © 2006 Cisco Systems, Inc. All rights reserved. BCMSN v Auxiliary VLANs Voice VLANs 802.1p/Q PortFast A highly available network

7 © 2006 Cisco Systems, Inc. All rights reserved. BCMSN v QoS Basics

8 © 2006 Cisco Systems, Inc. All rights reserved. BCMSN v High Availability for VoIP Traditional telephony networks claim percent uptime. Data networks must consider reliability and availability requirements when incorporating voice. Methods to improve reliability and availability include: –Redundant hardware –Redundant links –UPS –Proactive network management

9 © 2006 Cisco Systems, Inc. All rights reserved. BCMSN v Power Requirements in Support of VoIP Inline power or power patch panel for IP phones –May require special modules UPS and generator backup, with autorestart and monitoring A 4-hour service-response contract for system problems Recommended equipment operating temperatures maintained 24/7 Note: There are several power levels defined for VoIP, ranging from 4.0w to 15.4w, depending on the VoIP phone used.

10 © 2006 Cisco Systems, Inc. All rights reserved. BCMSN v Summary Converged networks reduce costs and increase productivity. VoIP equipment consists of a VoIP phone and a network infrastructure capable of supporting VoIP. Auxiliary VLANs provide the ability to apply QoS to voice traffic without affecting the flow of data from the client PC. To ensure high quality VoIP, implementation of QoS is required. High-availability networks must be created to avoid network congestion and overcome a lack of redundancy and poor engineering. For ease of implementation, most VoIP phones get power through the same cable on which data is sent. This is called inline power. Cisco supports 802.3af and its proprietary standard.

11