Cisco IE-3000-8TC Software Configuration Guide - Page 50

Network Configuration Examples Chapter 1 Overview Bandwidth alone is not the only consideration when designing your network. As your network traffic profiles evolve, consider providing network services that can support applications for voice and data integration, multimedia integration, application prioritization, and security. Table 1-2 describes some network demands and how you can meet them. Table 1-2 Providing Network Services Network Demands Suggested Design Methods Efficient bandwidth usage for multimedia applications and guaranteed bandwidth for critical applications • Use IGMP snooping to efficiently forward multimedia and multicast traffic. • Use other QoS mechanisms such as packet classification, marking, scheduling, and congestion avoidance to classify traffic with the appropriate priority level, thereby providing maximum flexibility and support for mission-critical, unicast, and multicast and multimedia applications. • Use MVR to continuously send multicast streams in a multicast VLAN but to isolate the streams from subscriber VLANs for bandwidth and security reasons. High demand on network redundancy • Use VLAN trunks and BackboneFast for traffic-load balancing on the uplink ports and availability to provide always on so that the uplink port with a lower relative port cost is selected to carry the VLAN mission-critical applications traffic. An evolving demand for IP telephony • Use QoS to prioritize applications such as IP telephony during congestion and to help control both delay and jitter within the network. • Use switches that support at least two queues per port to prioritize voice and data traffic as either high- or low-priority, based on IEEE 802.1p/Q. The switch supports at least four queues per port. • Use voice VLAN IDs (VVIDs) to provide separate VLANs for voice traffic. A growing demand for using existing infrastructure to transport data and voice from a home or office to the Internet or an intranet at higher speeds Use the Catalyst Long-Reach Ethernet (LRE) switches to provide up to 15 Mb of IP connectivity over existing infrastructure, such as existing telephone lines. Note LRE is the technology used in the Catalyst 2900 LRE XL and Catalyst 2950 LRE switches. See the documentation sets specific to these switches for LRE information. Ethernet-to-the-Factory Architecture This section is an overview of the Ethernet-to-the-Factory (EttF) architecture that provides network and security services to the devices and applications in automation and control systems. It then integrates those into the wider enterprise network. EttF architecture applies to many types of manufacturing environments, but it must be tailored to the industry type, the manufacturing type, and the production-facility size. Deployments can range from small networks (less than 50 devices), to medium-sized networks (less than 200 devices), and to large networks (up to and more than 1000 devices). Within the EttF architecture are conceptual structures called zones that separate the various functions, from the highest-level enterprise switches and processes to the smallest devices that control more detailed processes and devices on the factory floor. See Figure 1-1. For more information about EttF architecture, see this URL: http://wwwin.cisco.com/enterprise/solutions/manufacturing/solutions/ettf.shtml 1-14 Cisco IE 3000 Switch Software Configuration Guide OL-13018-03