Configuring the MLSSE

This section deals with topics involved in configuration of the switching engine or MLS-SE. Topics covered include enabling MLS, MLS caching, verifying MLS, external router support, and switch inclusion lists. MLS is enabled by default on Catalyst series switches that support Layer 3 switching in other words, if an RSM is on the switch. There are, however, a couple of cases where configuring the switch is necessary. The first is obvious, when the MLS-RP happens to be an external router. Because...

VLAN Frame Identification

Because a trunk link can be used to transport many VLANs, a switch must identify frames with their VLANs as they are sent and received over a trunk link. Frame identification, or tagging, assigns a unique user-defined ID to each frame transported on a trunk link. This ID can be thought of as the VLAN number or VLAN color, as if each VLAN was drawn on a network diagram in a unique color. VLAN frame identification was developed for switched networks. As each frame is transmitted over a trunk...

Foundation Summary

The Foundation Summary is a collection of tables and figures that provide a convenient review of many key concepts in this chapter. For those of you already comfortable with the topics in this chapter, this summary could help you recall a few details. For those of you who just read this chapter, this review should help solidify some key facts. For any of you doing your final prep before the exam, these tables and figures will hopefully be a convenient way to review the day before the exam. One...

VTP Advertisements

Each switch participating in VTP advertises VLANs, revision numbers, and VLAN parameters on its trunk ports to notify other switches in the management domain. VTP advertisements are sent as multicast frames. The switch intercepts frames sent to the VTP multicast address and processes them with its supervisory processor. VTP frames are forwarded out trunk links as a special case. Because all switches in a management domain learn of new VLAN configuration changes, a VLAN need only be created and...

Configuring the VTP Version

Two versions of VTP are available for use in a management domain. Catalyst switches are capable of running either VTP version 1 or VTP version 2. Within a management domain, the two versions are not interoperable. Therefore, the same VTP version must be configured on each switch in a domain. VTP version 1 is the default protocol on a switch. If a switch is capable of running VTP version 2, however, a switch may coexist with other version 1 switches, as long as its VTP version 2 is not enabled....

Contents

Strategies for Exam Preparation xxiv Chapter 1 All About the Cisco Certified Network Professional and Design Professional Certification 3 Overview of Cisco Certifications 4 Exams Required for Certification 5 Other Cisco Certifications 6 Recommended Training Path for CCNP and CCDP 8 How to Use This Book to Pass the Exam 9 I've Taken BCMSN Now What 11 I've Taken CLSC Now What 11 I've Learned Switching From Experience, But I Will Not Be Taking the BCMSN Course Now What 12 Chapter 2 Campus Network...

Privilege Levels

The two default levels of access are user and privileged. The user level allows the user to perform certain commands but does not give them the ability to modify the configuration or perform a debug. At the other end of the spectrum, the privileged level allows the user to issue all commands, including configuration and debug commands. Cisco IOS provides different levels of privileges for users with the use of the privilege level command. This command allows network administrators to provide a...

Token Ring VLANs

This section discusses VLANs as they are applied to Token Ring networks. Only the Catalyst 5000 and the Catalyst 3900 switches support Token Ring both using CLI-based commands. Recall from the discussion in Chapter 3, Basic Switch and Port Configuration, the basic topology of Token Ring networks. End stations are connected to multistation access units (MSAUs), which interconnect with other MSAUs to form a ring. Multiple rings can be interconnected by bridges for segmentation and frame...

CCIE Professional Development

Kennedy Clark, CCIE Kevin Hamilton, CCIE 1-57870-094-9 AVAILABLE NOW This volume provides an in-depth analysis of Cisco LAN switching technologies, architectures, and deployments, including unique coverage of Catalyst network design essentials. Network designs and configuration examples are incorporated throughout to demonstrate the principles and enable easy translation of the material into practice in production networks. Alvaro Retana, CCIE Don Slice, CCIE and Russ White, CCIE 1-57870-097-3...

All About the Cisco Certified Network Professional and Design Professional Certification

The Cisco Certified Network Professional (CCNP) and Cisco Certified Design Professional (CCDP) certifications are the second level of Cisco certifications and are becoming popular as more incentives become available to both certification holders and their employers. Cisco has designed both the CCNP and CCDP certifications as evidence that an individual has completed a rigorous path of testing in the network arena. The CCNP and CCDP tracks require the candidate to be comfortable in advanced...

Hot Standby Router Protocol

So what problem are we trying to solve We've looked at solutions that try to solve the problem of a network failure, but for various reasons don't necessarily fix the problem. Enter Hot Standby Router Protocol. HSRP addresses the problem caused by first-hop failures generally having static default gateway addresses on hosts. Previously, a failure at the default gateway address would leave the host unable to communicate outside of its own subnet. Now with HSRP, the default gateway is a...

Conclusion

The CCNP Switching Exam Certification Guide is designed to help you attain CCNP certification by successfully preparing you to pass the Switching Exam. This book is the Switching Exam certification book from the only Cisco-authorized publisher. We at Cisco Press believe that this book certainly can help you prepare for and pass the Switching Exam but the real work is up to you We trust that your time will be well spent. This chapter covers the following topics that you will need to master for...

Distributing Traffic in Ether Channel

Traffic in an EtherChannel is statistically load-balanced across the individual links bundled together. However, the load is not necessarily balanced equally across all of the links. Instead, frames are forwarded on a specific link as a function of the addresses present in the frame. Some combination of source and destination addresses (either MAC or IP addresses) is used to form a binary pattern used to select a link number in the bundle. Switches perform an exclusive-OR (XOR) operation on one...

Do I Know This Already Quiz

The purpose of the Do I Know This Already quiz is to help you decide what parts of this chapter to use. If you already intend to read the entire chapter, you do not necessarily need to answer these questions now. The quiz helps you make good choices of how to spend your limited study time. The quiz is sectioned into five smaller quizlets that correspond to the five major headings in the Foundation Topics section of the chapter. Although your answer may differ somewhat from the answers given,...

Root Bridge Placement

While STP is wonderfully automatic with its default values and election processes, the resulting tree structure may perform quite differently than expected. The Root Bridge election is based on the idea that one switch is chosen as a common reference point, and all other switches choose ports that are closest to the Root. The Root Bridge election is also based on the idea that the Root Bridge can become a central hub that interconnects other legs of the network. Therefore, the Root Bridge can...

Answers to Chapter 6 QA Section

1 What is the basic unit of ATM data What is its basic format (header, payload, etc.) The basic ATM data unit is the cell. An ATM cell consists of a 5-byte header and a 48-byte payload. 2 What process allows an IP packet to be transported within ATM cells Segmentation and Reassembly (SAR) provided by the ATM Adaptation Layer (AAL). 3 What is an ATM edge device What Cisco devices can be used An ATM edge device interfaces native ATM to another media. For example, Cisco Catalyst switches (5000 and...

Full Duplex Fast Ethernet

As with traditional Ethernet, the natural progression to improve performance is to use full-duplex operation. Fast Ethernet can provide 100 Mbps in each direction on a switched connection, for 200 Mbps total throughput. This throughput is only possible when a workstation or server is directly connected to a switch port, or when two switches directly connect to each other. The Fast Ethernet specification also offers backward compatibility to support traditional 10 Mbps Ethernet. To provide this...

Answers to Chapter 5 QA Section

1 What is EtherChannel What types of switch links can it be used with EtherChannel is a method for aggregating multiple physical Ethernet ports into a single logical link. EtherChannel can be used with full-duplex Fast Ethernet or Gigabit Ethernet links. 2 How does an EtherChannel distribute broadcasts and multicasts Broadcasts and multicasts are sent across only one port of the bundle and are not distributed across the EtherChannel. 3 How is traffic distributed over an EtherChannel Traffic is...

Establishing VLAN Connectivity

Next, the route processor will need to have its interfaces configured to support connectivity to the necessary VLANs. This is accomplished using interfaces and commands that are unique to the route processor hardware. The following sections present this information for each type of link between the route processor and switches. Establishing VLAN Connectivity with Physical Interfaces External routers are connected to switches using traditional LAN media links. For example, Ethernet, Fast...

MLS Management Interface

When a RSM or router is configured to participate in MLS, the device uses the MLSP to send Hello messages, advertise routing changes, and announce the VLANs or MAC addresses of those interfaces on the devices participating in MLS. One interface on the MLS-RP must be identified as the management interface through which MLSP packets are sent and received. The MLSP management interface can be any MLS interface connected to the switch. Only one management interface needs to be specified. If no...

About the Authors

Tim Boyles is the Director of Network Architecture for Link Networks, a national CLEC which specializes in broadband data and communications solutions for small- and medium-sized businesses. Prior to that he worked as a Senior Consultant at Lucent Networkcare, formerly known as INS, where he was responsible for the design and implementation of large switch-based networks as well as multiple service provider projects. Tim has been in the networking business for 16 years with multiple vendor...

Exams Required for Certification

To certify for CCNP or CCDP, successful completion of a group of exams is required. The exams generally match the same topics that are covered in one of the official Cisco courses. Table 1-1 outlines the exams and the courses with which they are most closely matched. Course Most Closely Matching Exam Requirements Interconnecting Cisco Network Devices (ICND) Building Scalable Cisco Networks (BSCN) Building Cisco Multilayer Switched Networks (BCMSN) Building Cisco Remote Access Networks (BCRAN)...

Recommended Training Path for CCNP and CCDP

The recommended training path for the Cisco CCNP 2.0 and CCDP 2.0 professional level certifications is as follows Building Scalable Cisco Networks (BSCN) Covers the advanced routing protocols and the scaling issues involved with a large routed network with multiple protocols. Building Cisco Multilayer Switched Networks (BCMSN) Covers the switch infrastructure and the configuration in a large network environment. Building Cisco Remote Access Networks (BCRAN) Covers the dialup and RAS issues...

Cisco CCNP Switching Exam Certification Guide

Tim Boyles and Dave Hucaby, CCIE 4594 Cisco CCNP Switching Exam Certification Guide Copyright 2001 Cisco Systems, Inc. Cisco Press logo is a trademark of Cisco Systems, Inc. All rights reserved. No part of this book may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or by any information storage and retrieval system, without written permission from the publisher, except for the inclusion of brief quotations in a review....