This document provides guidance on how to design a local area network (LAN) for a Business Ready Branch or autonomous Business Ready Office where corporate services such as voice, video, and data are converged onto a single office network. Because of the numerous combinations of features, platforms, and customer requirements that make up a branch office design, this version of the design guide focuses on various LAN designs for voice and data services. This document also includes design guidance on the LAN side of the office network using features such as 802.1x and Cisco Catalyst Integrated Security. Hardware and Software Options This section provides various hardware and software options for the LAN portion of the network. The hardware and software options are categorized based on multilayered branch architecture. Access Switches Factors to consider when choosing access layer switches include the following: • Spanning tree requirements • Layer 2 security features such as Cisco Integrated Security Features (CISF) requirements • Support for private virtual LANs (VLANs) • Support for Switched Port Analyzer (SPAN) and Remote SPAN (RSPAN) • Quality of service (QoS) requirement
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