Arista Warrior - Cdn.oreilly.com

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Table of Contents Preface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xi 1. Why Arista?. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 A Brief History of Arista 1 Key Players 1 The Needs of a Data Center 4 Data Center Networking 5 The Case for Low Latency 6 Network-Based Storage 6 Arista Delivers 7 Hardware 7 EOS 7 Bash 7 SysDB 8 MLAG 8 VARP 8 LANZ 8 VM Tracer 8 ZTP 9 Email 9 Event Scheduler 9 TCP Dump 9 Event Handler 9 Event Monitor 10 Extending EOS 10 CloudVision 10 2. Buffers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 3. Merchant Silicon. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 v
The Debate 23 Arista and Merchant Silicon 24 Arista Product ASICs 25 4. Fabric Speed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 5. Arista Products. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 Power 39 Airflow 40 Optics 41 EOS 42 Top-of-Rack Switches 43 One-Gigabit Switches 43 Ten-Gigabit Switches: 7100 Series 44 Ten-Gigabit Switches: 7050 Series 47 Chassis Switches 51 Arista 7500 Series 51 6. Introduction to EOS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 SysDB 58 Using EOS 59 7. Upgrading EOS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 8. LLDP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79 9. Bash. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85 10. SysDB. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91 11. Python. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99 12. MLAG. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107 MLAG Overview 107 Configuring MLAG 109 MLAG ISSU 123 13. Spanning Tree Protocol. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127 MST 128 MST Terminology 146 Why Pruning VLANs Can Be Bad 149 vi | Table of Contents
Page 2 and 3: Want to read more? Spreading the kn
Page 6 and 7: Spanning Tree and MLAG 151 14. Firs
Page 8 and 9: Arista Support 377 31. Aristacisms.
Page 10 and 11: Figure 2-1. Simple switch fabric of
Page 12 and 13: have collisions! Full-duplex conver
Page 14 and 15: Dropped packets might be OK for som
Page 16 and 17: Figure 2-6. Switch fabric with outp
Page 18 and 19: Figure 2-7. Head-of-line blocking V
Page 20 and 21: The kickin’ 10 Gbps data flow fro

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