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Viser: Scaling Networks V6 Companion Guide
Scaling Networks V6 Companion Guide
Cisco Networking Cisco Networking Academy
(2017)
Sprog: Engelsk
Cisco Press
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- Hardback: 672 sider
- Udgiver: Cisco Press (August 2017)
- ISBN: 9781587134340
Scaling Networks v6 Companion Guide is the official supplemental textbook for the Scaling Networks v6 course in the Cisco Networking Academy CCNA Routing and Switching curriculum. The Companion Guide is designed as a portable desk reference to use anytime, anywhere to reinforce the material from the course and organize your time. The book's features help you focus on important concepts to succeed in this course: - Chapter objectives-Review core concepts by answering the focus questions listed at the beginning of each chapter. - Key terms-Refer to the lists of networking vocabulary introduced and highlighted in context in each chapter. - Glossary-Consult the comprehensive Glossary with more than 250 terms. - Summary of Activities and Labs-Maximize your study time with this complete list of all associated practice exercises at the end of each chapter. - Check Your Understanding-Evaluate your readiness with the end-of-chapter questions that match the style of questions you see in the online course quizzes. The answer key explains each answer. How To-Look for this icon to study the steps you need to learn to perform certain tasks. Interactive Activities-Reinforce your understanding of topics with dozens of exercises from the online course identified throughout the book with this icon. Videos-Watch the videos embedded within the online course. Packet Tracer Activities-Explore and visualize networking concepts using Packet Tracer exercises interspersed throughout the chapters and provided in the accompanying Labs & Study Guide book. Hands-on Labs-Work through all the course labs and additional Class Activities that are included in the course and published in the separate Labs & Study Guide. Normal 0 false false false EN-US X-NONE X-NONE
Introduction xx
Chapter 1 LAN Design 1 Objectives 1 Key Terms 1 Introduction (1.0.1.1) 3 Campus Wired LAN Designs (1.1) 4 Cisco Validated Designs (1.1.1) 4 The Need to Scale the Network (1.1.1.1) 4 Hierarchical Design Model (1.1.1.2) 6 Expanding the Network (1.1.2) 8 Design for Scalability (1.1.2.1) 8 Planning for Redundancy (1.1.2.2) 10 Failure Domains (1.1.2.3) 11 Increasing Bandwidth (1.1.2.4) 13 Expanding the Access Layer (1.1.2.5) 14 Fine-tuning Routing Protocols (1.1.2.6) 15 Selecting Network Devices (1.2) 17 Switch Hardware (1.2.1) 17 Switch Platforms (1.2.1.1) 17 Port Density (1.2.1.2) 21 Forwarding Rates (1.2.1.3) 22 Power over Ethernet (1.2.1.4) 23 Multilayer Switching (1.2.1.5) 24 Router Hardware (1.2.2) 26 Router Requirements (1.2.2.1) 26 Cisco Routers (1.2.2.2) 27 Router Hardware (1.2.2.3) 28 Managing Devices (1.2.3) 29 Managing IOS Files and Licensing (1.2.3.1) 30 In-Band versus Out-of-Band Management (1.2.3.2) 30 Basic Router CLI Commands (1.2.3.3) 31 Basic Router Show Commands (1.2.3.4) 34 Basic Switch CLI Commands (1.2.3.5) 38 Basic Switch Show Commands (1.2.3.6) 40 Summary (1.3) 43 Practice 44 Check Your Understanding Questions 45
Chapter 2 Scaling VLANs 47 Objectives 47 Key Terms 47 Introduction (2.0.1.1) 48 VTP, Extended VLANs, and DTP (2.1) 48 VTP Concepts and Operation (2.1.1) 49 VTP Overview (2.1.1.1) 49 VTP Modes (2.1.1.2) 50 VTP Advertisements (2.1.1.3) 52 VTP Versions (2.1.1.4) 53 Default VTP Configuration (2.1.1.5) 53 VTP Caveats (2.1.1.6) 55 VTP Configuration (2.1.2) 57 VTP Configuration Overview (2.1.2.1) 57 Step 1-Configure the VTP Server (2.1.2.2) 58 Step 2-Configure the VTP Domain Name and Password (2.1.2.3) 59 Step 3-Configure the VTP Clients (2.1.2.4) 60 Step 4-Configure VLANs on the VTP Server (2.1.2.5) 60 Step 5-Verify That the VTP Clients Have Received the New VLAN Information (2.1.2.6) 62 Extended VLANs (2.1.3) 63 VLAN Ranges on Catalyst Switches (2.1.3.1) 63 Creating a VLAN (2.1.3.2) 65 Assigning Ports to VLANs (2.1.3.3) 66 Verifying VLAN Information (2.1.3.4) 67 Configuring Extended VLANs (2.1.3.5) 69 Dynamic Trunking Protocol (2.1.4) 71 Introduction to DTP (2.1.4.1) 71 Negotiated Interface Modes (2.1.4.2) 72 Troubleshoot Multi-VLAN Issues (2.2) 75 Inter-VLAN Configuration Issues (2.2.1) 75 Deleting VLANs (2.2.1.1) 75 Switch Port Issues (2.2.1.2) 77 Verify Switch Configuration (2.2.1.3) 79 Interface Issues (2.2.1.4) 81 Verify Routing Configuration (2.2.1.5) 82 IP Addressing Issues (2.2.2) 83 Errors with IP Addresses and Subnet Masks (2.2.2.1) 83 Verifying IP Address and Subnet Mask Configuration Issues (2.2.2.2) 85 VTP and DTP Issues (2.2.3) 88 Troubleshoot VTP Issues (2.2.3.1) 88 Troubleshoot DTP Issues (2.2.3.2) 89 Layer 3 Switching (2.3) 89 Layer 3 Switching Operation and Configuration (2.3.1) 90 Introduction to Layer 3 Switching (2.3.1.1) 90 Inter-VLAN Routing with Switch Virtual Interfaces (2.3.1.2) 91 Inter-VLAN Routing with Switch Virtual Interfaces (Con''t.) (2.3.1.3) 92 Inter-VLAN Routing with Routed Ports (2.3.1.4) 94 Troubleshoot Layer 3 Switching (2.3.2) 95 Layer 3 Switch Configuration Issues (2.3.2.1) 95 Example: Troubleshooting Layer 3 Switching (2.3.2.2) 96 Summary (2.4) 99 Practice 99 Check Your Understanding Questions 100
Chapter 3 STP 105 Objectives 105 Key Terms 105 Introduction (3.0.1.1) 107 Spanning Tree Concepts (3.1) 108 Purpose of Spanning Tree (3.1.1) 108 Redundancy at OSI Layers 1 and 2 (3.1.1.1) 108 Issues with Layer 1 Redundancy: MAC Database Instability (3.1.1.2) 109 Issues with Layer 1 Redundancy: Broadcast Storms (3.1.1.3) 111 Issues with Layer 1 Redundancy: Duplicate Unicast Frames (3.1.1.4) 113 STP Operation (3.1.2) 114 Spanning Tree Algorithm: Introduction (3.1.2.1) 114 Spanning Tree Algorithm: Port Roles (3.1.2.2) 117 Spanning Tree Algorithm: Root Bridge (3.1.2.3) 119 Spanning Tree Algorithm: Root Path Cost (3.1.2.4) 121 Port Role Decisions for RSTP (3.1.2.5) 124 Designated and Alternate Ports (3.1.2.6) 127
802.1D BPDU Frame Format (3.1.2.7) 128
802.1D BPDU Propagation and Process (3.1.2.8) 131 Extended System ID (3.1.2.9) 136 Varieties of Spanning Tree Protocols (3.2) 140 Overview (3.2.1) 140 Types of Spanning Tree Protocols (3.2.1.1) 140 Characteristics of the Spanning Tree Protocols (3.2.1.2) 141 PVST+ (3.2.2) 143 Overview of PVST+ (3.2.2.1) 143 Port States and PVST+ Operation (3.2.2.2) 144 Extended System ID and PVST+ Operation (3.2.2.3) 146 Rapid PVST+ (3.2.3) 148 Overview of Rapid PVST+ (3.2.3.1) 148 RSTP BPDUs (3.2.3.2) 149 Edge Ports (3.2.3.3) 150 Link Types (3.2.3.4) 152 Spanning Tree Configuration (3.3) 153 PVST+ Configuration (3.3.1) 153 Catalyst 2960 Default Configuration (3.3.1.1) 153 Configuring and Verifying the Bridge ID (3.3.1.2) 154 PortFast and BPDU Guard (3.3.1.3) 156 PVST+ Load Balancing (3.3.1.4) 158 Rapid PVST+ Configuration (3.3.2) 160 Spanning Tree Mode (3.3.2.1) 161 STP Configuration Issues (3.3.3) 163 Analyzing the STP Topology (3.3.3.1) 164 Expected Topology versus Actual Topology (3.3.3.2) 164 Overview of Spanning Tree Status (3.3.3.3) 165 Spanning Tree Failure Consequences (3.3.3.4) 166 Repairing a Spanning Tree Problem (3.3.3.5) 169 Switch Stacking and Chassis Aggregation (3.3.4) 169 Switch Stacking Concepts (3.3.4.1) 169 Spanning Tree and Switch Stacks (3.3.4.2) 170 Summary (3.4) 173 Practice 174 Check Your Understanding Questions 174
Chapter 4 EtherChannel and HSRP 179 Objectives 179 Key Terms 179 Introduction (4.0.1.1) 180 Link Aggregation Concepts (4.1) 181 Link Aggregation (4.1.1) 181 Introduction to Link Aggregation (4.1.1.1) 181 Advantages of EtherChannel (4.1.1.2) 182 EtherChannel Operation (4.1.2) 183 Implementation Restrictions (4.1.2.1) 183 Port Aggregation Protocol (4.1.2.2) 185 Link Aggregation Control Protocol (4.1.2.3) 186 Link Aggregation Configuration (4.2) 188 Configuring EtherChannel (4.2.1) 188 Configuration Guidelines (4.2.1.1) 188 Configuring Interfaces (4.2.1.2) 189 Verifying and Troubleshooting EtherChannel (4.2.2) 191 Verifying EtherChannel (4.2.2.1) 191 Troubleshooting EtherChannel (4.2.2.2) 194 First Hop Redundancy Protocols (4.3) 198 Concept of First Hop Redundancy Protocols (4.3.1) 198 Default Gateway Limitations (4.3.1.1) 198 Router Redundancy (4.3.1.2) 199 Steps for Router Failover (4.3.1.3) 200 First Hop Redundancy Protocols (4.3.1.5) 201 HSRP Operations (4.3.2) 202 HSRP Overview (4.3.2.1) 203 HSRP Versions (4.3.2.2) 204 HSRP Priority and Preemption (4.3.2.3) 204 HSRP States and Timers (4.3.2.4) 205 HSRP Configuration (4.3.3) 206 HSRP Configuration Commands (4.3.3.1) 206 HSRP Sample Configuration (4.3.3.2) 207 HSRP Verification (4.3.3.3) 208 HSRP Troubleshooting (4.3.4) 209 HSRP Failure (4.3.4.1) 209 HSRP Debug Commands (4.3.4.2) 210 Common HSRP Configuration Issues (4.3.4.3) 213 Summary (4.4) 214 Practice 215 Check Your Understanding Questions 216
Chapter 5 Dynamic Routing 219 Objectives 219 Key Terms 219 Introduction (5.0.1.1) 221 Dynamic Routing Protocols (5.1) 222 Types of Routing Protocols (5.1.1) 222 Classifying Routing Protocols (5.1.1.1) 222 IGP and EGP Routing Protocols (5.1.1.2) 224 Distance Vector Routing Protocols (5.1.1.3) 226 Link-State Routing Protocols (5.1.1.4) 226 Classful Routing Protocols (5.1.1.5) 228 Classless Routing Protocols (5.1.1.6) 231 Routing Protocol Characteristics (5.1.1.7) 233 Routing Protocol Metrics (5.1.1.8) 234 Distance Vector Dynamic Routing (5.2) 236 Distance Vector Fundamentals (5.2.1) 236 Dynamic Routing Protocol Operation (5.2.1.1) 236 Cold Start (5.2.1.2) 237 Network Discovery (5.2.1.3) 238 Exchanging the Routing Information (5.2.1.4) 239 Achieving Convergence (5.2.1.5) 241 Distance Vector Routing Protocol Operation (5.2.2) 242 Distance Vector Technologies (5.2.2.1) 242 Distance Vector Algorithm (5.2.2.2) 242 Types of Distance Vector Routing Protocols (5.2.3) 245 Routing Information Protocol (5.2.3.1) 245 Enhanced Interior-Gateway Routing Protocol (5.2.3.2) 246 Link-State Dynamic Routing (5.3) 248 Link-State Routing Protocol Operation (5.3.1) 248 Shortest Path First Protocols (5.3.1.1) 248 Dijkstra''s Algorithm (5.3.1.2) 248 SPF Example (5.3.1.3) 249 Link-State Updates (5.3.2) 251 Link-State Routing Process (5.3.2.1) 251 Link and Link-State (5.3.2.2) 252 Say Hello (5.3.2.3) 256 Building the Link-State Packet (5.3.2.4) 257 Flooding the LSP (5.3.2.5) 258 Building the Link-State Database (5.3.2.6) 259 Building the SPF Tree (5.3.2.7) 260 Adding OSPF Routes to the Routing Table (5.3.2.8) 264
Chapter 1 LAN Design 1 Objectives 1 Key Terms 1 Introduction (1.0.1.1) 3 Campus Wired LAN Designs (1.1) 4 Cisco Validated Designs (1.1.1) 4 The Need to Scale the Network (1.1.1.1) 4 Hierarchical Design Model (1.1.1.2) 6 Expanding the Network (1.1.2) 8 Design for Scalability (1.1.2.1) 8 Planning for Redundancy (1.1.2.2) 10 Failure Domains (1.1.2.3) 11 Increasing Bandwidth (1.1.2.4) 13 Expanding the Access Layer (1.1.2.5) 14 Fine-tuning Routing Protocols (1.1.2.6) 15 Selecting Network Devices (1.2) 17 Switch Hardware (1.2.1) 17 Switch Platforms (1.2.1.1) 17 Port Density (1.2.1.2) 21 Forwarding Rates (1.2.1.3) 22 Power over Ethernet (1.2.1.4) 23 Multilayer Switching (1.2.1.5) 24 Router Hardware (1.2.2) 26 Router Requirements (1.2.2.1) 26 Cisco Routers (1.2.2.2) 27 Router Hardware (1.2.2.3) 28 Managing Devices (1.2.3) 29 Managing IOS Files and Licensing (1.2.3.1) 30 In-Band versus Out-of-Band Management (1.2.3.2) 30 Basic Router CLI Commands (1.2.3.3) 31 Basic Router Show Commands (1.2.3.4) 34 Basic Switch CLI Commands (1.2.3.5) 38 Basic Switch Show Commands (1.2.3.6) 40 Summary (1.3) 43 Practice 44 Check Your Understanding Questions 45
Chapter 2 Scaling VLANs 47 Objectives 47 Key Terms 47 Introduction (2.0.1.1) 48 VTP, Extended VLANs, and DTP (2.1) 48 VTP Concepts and Operation (2.1.1) 49 VTP Overview (2.1.1.1) 49 VTP Modes (2.1.1.2) 50 VTP Advertisements (2.1.1.3) 52 VTP Versions (2.1.1.4) 53 Default VTP Configuration (2.1.1.5) 53 VTP Caveats (2.1.1.6) 55 VTP Configuration (2.1.2) 57 VTP Configuration Overview (2.1.2.1) 57 Step 1-Configure the VTP Server (2.1.2.2) 58 Step 2-Configure the VTP Domain Name and Password (2.1.2.3) 59 Step 3-Configure the VTP Clients (2.1.2.4) 60 Step 4-Configure VLANs on the VTP Server (2.1.2.5) 60 Step 5-Verify That the VTP Clients Have Received the New VLAN Information (2.1.2.6) 62 Extended VLANs (2.1.3) 63 VLAN Ranges on Catalyst Switches (2.1.3.1) 63 Creating a VLAN (2.1.3.2) 65 Assigning Ports to VLANs (2.1.3.3) 66 Verifying VLAN Information (2.1.3.4) 67 Configuring Extended VLANs (2.1.3.5) 69 Dynamic Trunking Protocol (2.1.4) 71 Introduction to DTP (2.1.4.1) 71 Negotiated Interface Modes (2.1.4.2) 72 Troubleshoot Multi-VLAN Issues (2.2) 75 Inter-VLAN Configuration Issues (2.2.1) 75 Deleting VLANs (2.2.1.1) 75 Switch Port Issues (2.2.1.2) 77 Verify Switch Configuration (2.2.1.3) 79 Interface Issues (2.2.1.4) 81 Verify Routing Configuration (2.2.1.5) 82 IP Addressing Issues (2.2.2) 83 Errors with IP Addresses and Subnet Masks (2.2.2.1) 83 Verifying IP Address and Subnet Mask Configuration Issues (2.2.2.2) 85 VTP and DTP Issues (2.2.3) 88 Troubleshoot VTP Issues (2.2.3.1) 88 Troubleshoot DTP Issues (2.2.3.2) 89 Layer 3 Switching (2.3) 89 Layer 3 Switching Operation and Configuration (2.3.1) 90 Introduction to Layer 3 Switching (2.3.1.1) 90 Inter-VLAN Routing with Switch Virtual Interfaces (2.3.1.2) 91 Inter-VLAN Routing with Switch Virtual Interfaces (Con''t.) (2.3.1.3) 92 Inter-VLAN Routing with Routed Ports (2.3.1.4) 94 Troubleshoot Layer 3 Switching (2.3.2) 95 Layer 3 Switch Configuration Issues (2.3.2.1) 95 Example: Troubleshooting Layer 3 Switching (2.3.2.2) 96 Summary (2.4) 99 Practice 99 Check Your Understanding Questions 100
Chapter 3 STP 105 Objectives 105 Key Terms 105 Introduction (3.0.1.1) 107 Spanning Tree Concepts (3.1) 108 Purpose of Spanning Tree (3.1.1) 108 Redundancy at OSI Layers 1 and 2 (3.1.1.1) 108 Issues with Layer 1 Redundancy: MAC Database Instability (3.1.1.2) 109 Issues with Layer 1 Redundancy: Broadcast Storms (3.1.1.3) 111 Issues with Layer 1 Redundancy: Duplicate Unicast Frames (3.1.1.4) 113 STP Operation (3.1.2) 114 Spanning Tree Algorithm: Introduction (3.1.2.1) 114 Spanning Tree Algorithm: Port Roles (3.1.2.2) 117 Spanning Tree Algorithm: Root Bridge (3.1.2.3) 119 Spanning Tree Algorithm: Root Path Cost (3.1.2.4) 121 Port Role Decisions for RSTP (3.1.2.5) 124 Designated and Alternate Ports (3.1.2.6) 127
802.1D BPDU Frame Format (3.1.2.7) 128
802.1D BPDU Propagation and Process (3.1.2.8) 131 Extended System ID (3.1.2.9) 136 Varieties of Spanning Tree Protocols (3.2) 140 Overview (3.2.1) 140 Types of Spanning Tree Protocols (3.2.1.1) 140 Characteristics of the Spanning Tree Protocols (3.2.1.2) 141 PVST+ (3.2.2) 143 Overview of PVST+ (3.2.2.1) 143 Port States and PVST+ Operation (3.2.2.2) 144 Extended System ID and PVST+ Operation (3.2.2.3) 146 Rapid PVST+ (3.2.3) 148 Overview of Rapid PVST+ (3.2.3.1) 148 RSTP BPDUs (3.2.3.2) 149 Edge Ports (3.2.3.3) 150 Link Types (3.2.3.4) 152 Spanning Tree Configuration (3.3) 153 PVST+ Configuration (3.3.1) 153 Catalyst 2960 Default Configuration (3.3.1.1) 153 Configuring and Verifying the Bridge ID (3.3.1.2) 154 PortFast and BPDU Guard (3.3.1.3) 156 PVST+ Load Balancing (3.3.1.4) 158 Rapid PVST+ Configuration (3.3.2) 160 Spanning Tree Mode (3.3.2.1) 161 STP Configuration Issues (3.3.3) 163 Analyzing the STP Topology (3.3.3.1) 164 Expected Topology versus Actual Topology (3.3.3.2) 164 Overview of Spanning Tree Status (3.3.3.3) 165 Spanning Tree Failure Consequences (3.3.3.4) 166 Repairing a Spanning Tree Problem (3.3.3.5) 169 Switch Stacking and Chassis Aggregation (3.3.4) 169 Switch Stacking Concepts (3.3.4.1) 169 Spanning Tree and Switch Stacks (3.3.4.2) 170 Summary (3.4) 173 Practice 174 Check Your Understanding Questions 174
Chapter 4 EtherChannel and HSRP 179 Objectives 179 Key Terms 179 Introduction (4.0.1.1) 180 Link Aggregation Concepts (4.1) 181 Link Aggregation (4.1.1) 181 Introduction to Link Aggregation (4.1.1.1) 181 Advantages of EtherChannel (4.1.1.2) 182 EtherChannel Operation (4.1.2) 183 Implementation Restrictions (4.1.2.1) 183 Port Aggregation Protocol (4.1.2.2) 185 Link Aggregation Control Protocol (4.1.2.3) 186 Link Aggregation Configuration (4.2) 188 Configuring EtherChannel (4.2.1) 188 Configuration Guidelines (4.2.1.1) 188 Configuring Interfaces (4.2.1.2) 189 Verifying and Troubleshooting EtherChannel (4.2.2) 191 Verifying EtherChannel (4.2.2.1) 191 Troubleshooting EtherChannel (4.2.2.2) 194 First Hop Redundancy Protocols (4.3) 198 Concept of First Hop Redundancy Protocols (4.3.1) 198 Default Gateway Limitations (4.3.1.1) 198 Router Redundancy (4.3.1.2) 199 Steps for Router Failover (4.3.1.3) 200 First Hop Redundancy Protocols (4.3.1.5) 201 HSRP Operations (4.3.2) 202 HSRP Overview (4.3.2.1) 203 HSRP Versions (4.3.2.2) 204 HSRP Priority and Preemption (4.3.2.3) 204 HSRP States and Timers (4.3.2.4) 205 HSRP Configuration (4.3.3) 206 HSRP Configuration Commands (4.3.3.1) 206 HSRP Sample Configuration (4.3.3.2) 207 HSRP Verification (4.3.3.3) 208 HSRP Troubleshooting (4.3.4) 209 HSRP Failure (4.3.4.1) 209 HSRP Debug Commands (4.3.4.2) 210 Common HSRP Configuration Issues (4.3.4.3) 213 Summary (4.4) 214 Practice 215 Check Your Understanding Questions 216
Chapter 5 Dynamic Routing 219 Objectives 219 Key Terms 219 Introduction (5.0.1.1) 221 Dynamic Routing Protocols (5.1) 222 Types of Routing Protocols (5.1.1) 222 Classifying Routing Protocols (5.1.1.1) 222 IGP and EGP Routing Protocols (5.1.1.2) 224 Distance Vector Routing Protocols (5.1.1.3) 226 Link-State Routing Protocols (5.1.1.4) 226 Classful Routing Protocols (5.1.1.5) 228 Classless Routing Protocols (5.1.1.6) 231 Routing Protocol Characteristics (5.1.1.7) 233 Routing Protocol Metrics (5.1.1.8) 234 Distance Vector Dynamic Routing (5.2) 236 Distance Vector Fundamentals (5.2.1) 236 Dynamic Routing Protocol Operation (5.2.1.1) 236 Cold Start (5.2.1.2) 237 Network Discovery (5.2.1.3) 238 Exchanging the Routing Information (5.2.1.4) 239 Achieving Convergence (5.2.1.5) 241 Distance Vector Routing Protocol Operation (5.2.2) 242 Distance Vector Technologies (5.2.2.1) 242 Distance Vector Algorithm (5.2.2.2) 242 Types of Distance Vector Routing Protocols (5.2.3) 245 Routing Information Protocol (5.2.3.1) 245 Enhanced Interior-Gateway Routing Protocol (5.2.3.2) 246 Link-State Dynamic Routing (5.3) 248 Link-State Routing Protocol Operation (5.3.1) 248 Shortest Path First Protocols (5.3.1.1) 248 Dijkstra''s Algorithm (5.3.1.2) 248 SPF Example (5.3.1.3) 249 Link-State Updates (5.3.2) 251 Link-State Routing Process (5.3.2.1) 251 Link and Link-State (5.3.2.2) 252 Say Hello (5.3.2.3) 256 Building the Link-State Packet (5.3.2.4) 257 Flooding the LSP (5.3.2.5) 258 Building the Link-State Database (5.3.2.6) 259 Building the SPF Tree (5.3.2.7) 260 Adding OSPF Routes to the Routing Table (5.3.2.8) 264
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