![]() When the process is incomplete, the frame is forwarded (flooded) out to all ports in that VLAN. If the destination is unknown or the frame is destined to a broadcast or multicast address, the address learning process is incomplete. The tables indicate which egress port forwards each frame that is received. Content-addressable memory (CAM) lookup tables on each switch Supervisor Engine are populated by an SA learning process. The source address (SA) and destination address (DA) of the data frames are not changed throughout Layer 2 (L2)-switched domains. In basic frame forwarding, user data frames originate from end systems. Whether these protocols are Cisco proprietary, such as Cisco Discovery Protocol (CDP), or standards-based, such as IEEE 802.1D (Spanning Tree Protocol ), all have certain elements in common when the protocols are implemented on the Catalyst series. Therefore, there must be a controlled exchange of keepalive messages, configuration parameters, and management changes. Most features that are enabled in a Catalyst network require two or more switches to cooperate. A basic comprehension of the protocols is helpful when you tackle each section. This section introduces the protocols that run between switches under normal operation. This section discusses features that are deployed when you use the majority of Catalyst networks. ![]() SAFE: A Security Blueprint for Enterprise NetworksĬisco Field Manual: Catalyst Switch Configuration But, other good foundational and educational references are:Ĭomparison of the Cisco Catalyst and Cisco IOS Operating Systems for the Cisco Catalyst 6500 Series SwitchĬisco LAN Switching (CCIE Professional Development series)īuilding Cisco Multilayer Switched Networks This document provides references to public online material so that you can read further. The support page provides product documentation as well as troubleshooting and configuration documents. Refer to the LAN Switching Technology Support for more information on any of the topics that this document covers. The references that this section lists provide additional depth into the topics that this document discusses. There are many reference sites for the Catalyst 6500/6000 and Catalyst 4500/4000 product lines on. Solutions that promote high availability and high stability Solutions that are easy to manage and that network operations teams configure Solutions that are simple, which trade some flexibility for deterministic results Solutions that have, statistically, the broadest field exposure and, thus, the lowest risk Consequently, this document emphasizes real-world configurations that make networks successful. The solutions that this document offers represent years of field experience from Cisco engineers who work with complex networks and many of the largest customers. The document does not cover overall campus network design. This document assumes a basic comprehension and familiarity with the Cisco IOS Software user interface. Therefore, you can read each section independently and make changes in a phased approach. This document provides modular configuration guidance. Refer to the document Best Practices for Catalyst 4500/4000, 5500/5000, and 6500/6000 Series Switches Running CatOS Configuration and Management for information on CatOS because this document covers Cisco IOS system software.Ĭisco IOS system software provides users with some of these advantages: CatOS, with the Cisco IOS Software option for router daughter cards and modules, is supported in these switch series:Ĭisco IOS system software is supported in these switch series: In this mode, Cisco IOS Software is the system software, and it replaces CatOS.īoth CatOS and Cisco IOS Software operating systems are deployed in critical networks. The integration results in a single command line for both switching and routing configuration. ![]() In this mode, the functionality of CatOS has been integrated into Cisco IOS Software. Cisco IOS Software that runs on the routing module is an option that requires CatOS system software.įor Cisco IOS Software, there is only one command line for configuration. The Cisco IOS Software command line for routingĬatOS is the system software, which runs on the Supervisor Engine. ![]() In this mode, there are two command lines for configuration: The Multilayer Switch Feature Card (MSFC) in the Catalyst 6500/6000 With CatOS, there is the option to run Cisco IOS Software on router daughter cards or modules such as: The Catalyst 6500/6000 and Catalyst 4500/4000 series switches support one of these two operating systems that run on the Supervisor Engine: This document provides best practices for Catalyst 000 series switches that run Cisco IOS ® Software on the Supervisor Engine.
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