ACI Advanced Monitoring and Troubleshooting

Name: ACI Advanced Monitoring and Troubleshooting
Author: Sadiq Memon

Paperback Engels 2021 9781587145285

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Samenvatting

ACI Advanced Monitoring and Troubleshooting provides a solid conceptual foundation and in-depth technical knowledge for monitoring and troubleshooting virtually any problem encountered during testing, deployment, or operation of Cisco Application Centric Infrastructure (ACI) infrastructure. Authored by leading ACI support experts at Cisco, it covers all students will need to learn to keep an ACI deployment working optimally. Coverage includes: Core ACI concepts and components, including Nexus 9000 Series platforms, APIC controllers, and protocols In-depth insight into ACI’s policy model ACI fabric design options: single and multiple data centers, stretched vs. multiple fabrics, and multi-pod/multi-site Automation, orchestration, and the cloud in ACI environments ACI topology and hardware/software specifications End host and network connectivity VMM integration Network management configuration, including SNMP, AAA, and SPAN Monitoring ACI fabrics and health Getting immediate results through the NX-OS command line interface Troubleshooting use cases: fabric discovery, APIC, management access, contracts, external connectivity, leaf/spine connectivity, end-host connectivity, VMM problems, ACI multi-pod/multi-site problems, and more

Specificaties

ISBN13:9781587145285

Taal:Engels

Bindwijze:Paperback

Uitgever:Pearson Education

Serie:Networking Technology

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<div> Foreword by Yusuf Bhaiji     xxviii </div> <div> <br> </div> <div> Foreword by Ronak Desai     xxix </div> <div> <br> </div> <div> Introduction     xxx </div> <div> <br> </div> <div> PART I:  INTRODUCTION TO ACI </div> <div> <br> </div> <div> Chapter 1  Fundamental Functions and Components of Cisco ACI     1 </div> <div> <br> </div> <div> ACI Building Blocks     8 </div> <div> <br> </div> <div>     Hardware Specifications     8 </div> <div> <br> </div> <div> ACI Key Concepts     14 </div> <div> <br> </div> <div>     Control Plane     15 </div> <div> <br> </div> <div>     Data Plane     17 </div> <div> <br> </div> <div>     VXLAN     17 </div> <div> <br> </div> <div>     Tenant     18 </div> <div> <br> </div> <div>     VRF     19 </div> <div> <br> </div> <div>     Application Profile     20 </div> <div> <br> </div> <div>     Endpoint Group     21 </div> <div> <br> </div> <div>     Contracts     22 </div> <div> <br> </div> <div>     Bridge Domain     24 </div> <div> <br> </div> <div>     External Routed or Bridged Network     25 </div> <div> <br> </div> <div> Summary     26 </div> <div> <br> </div> <div> Review Key Topics     26 </div> <div> <br> </div> <div> Review Questions     27 </div> <div> <br> </div> <div> Chapter 2  Introduction to the ACI Policy Model     31 </div> <div> <br> </div> <div> Key Characteristics of the Policy Model     32 </div> <div> <br> </div> <div>     Management Information Tree (MIT)     33 </div> <div> <br> </div> <div>     Benefits of a Policy Model     37 </div> <div> <br> </div> <div> Logical Constructs     37 </div> <div> <br> </div> <div> Tenant Objects     38 </div> <div> <br> </div> <div> VRF Objects     39 </div> <div> <br> </div> <div> Application Profile Objects     40 </div> <div> <br> </div> <div> Endpoint Group Objects     41 </div> <div> <br> </div> <div> Bridge Domain and Subnet Objects     43 </div> <div> <br> </div> <div>     Bridge Domain Options     45 </div> <div> <br> </div> <div> Contract Objects     46 </div> <div> <br> </div> <div>     Labels, Filters, and Aliases     48 </div> <div> <br> </div> <div>     Contract Inheritance     49 </div> <div> <br> </div> <div>     Contract Preferred Groups     49 </div> <div> <br> </div> <div>     vzAny     50 </div> <div> <br> </div> <div> Outside Network Objects     51 </div> <div> <br> </div> <div> Physical Construct     52 </div> <div> <br> </div> <div>     Access Policies     52 </div> <div> <br> </div> <div>     Switch Policies     53 </div> <div> <br> </div> <div>     Interface Policies     54 </div> <div> <br> </div> <div>     Global Policies     55 </div> <div> <br> </div> <div> Managed Object Relationships and Policy Resolution     57 </div> <div> <br> </div> <div> Tags     58 </div> <div> <br> </div> <div> Default Policies     58 </div> <div> <br> </div> <div> How a Policy Model Helps in Diagnosis     60 </div> <div> <br> </div> <div> Summary     63 </div> <div> <br> </div> <div> Review Key Topics     63 </div> <div> <br> </div> <div> Review Questions     64 </div> <div> <br> </div> <div> Chapter 3  ACI Command-Line Interfaces     67 </div> <div> <br> </div> <div> APIC CLIs     68 </div> <div> <br> </div> <div>     NX-OS–Style CLI     68 </div> <div> <br> </div> <div>     Bash CLI     74 </div> <div> <br> </div> <div> ACI Fabric Switch CLIs     78 </div> <div> <br> </div> <div>     iBash CLI     78 </div> <div> <br> </div> <div>     VSH CLI     81 </div> <div> <br> </div> <div>     VSH_LC CLI     83 </div> <div> <br> </div> <div> Summary     84 </div> <div> <br> </div> <div> Reference     84 </div> <div> <br> </div> <div> Chapter 4  ACI Fabric Design Options     85 </div> <div> <br> </div> <div> Physical Design     85 </div> <div> <br> </div> <div>     Single- Versus Multiple-Fabric Design     87 </div> <div> <br> </div> <div>     Multi-Pod     97 </div> <div> <br> </div> <div>     Multi-Site     116 </div> <div> <br> </div> <div>     Remote Leaf     131 </div> <div> <br> </div> <div>     Hardware and Software Support     134 </div> <div> <br> </div> <div>     ACI Multi-Pod and Remote Leaf Integration     143 </div> <div> <br> </div> <div> Logical Design     149 </div> <div> <br> </div> <div>     Design 1: Container-as-a-Service Using the OpenShift Platform and Calico CNI     149 </div> <div> <br> </div> <div> Design 2: Vendor-Based ERP/SAP Hana Design with ACI     165 </div> <div> <br> </div> <div> Design 3: vBrick Digital Media Engine Design with ACI     175 </div> <div> <br> </div> <div> Summary     180 </div> <div> <br> </div> <div> Review Key Topics     181 </div> <div> <br> </div> <div> Review Questions     181 </div> <div> <br> </div> <div> Chapter 5  End Host and Network Connectivity     185 </div> <div> <br> </div> <div> End Host Connectivity     185 </div> <div> <br> </div> <div>     VLAN Pool     186 </div> <div> <br> </div> <div>     Domain     186 </div> <div> <br> </div> <div>     Attachable Access Entity Profiles (AAEPs)     186 </div> <div> <br> </div> <div>     Switch Policies     187 </div> <div> <br> </div> <div>     Interface Policies     188 </div> <div> <br> </div> <div>     Virtual Port Channel (VPC)     191 </div> <div> <br> </div> <div>     Port Channel     197 </div> <div> <br> </div> <div>     Access Port     201 </div> <div> <br> </div> <div>     Best Practices in Configuring Access Policies     206 </div> <div> <br> </div> <div>     Compute and Storage Connectivity     207 </div> <div> <br> </div> <div>     L4/L7 Service Device Connectivity     210 </div> <div> <br> </div> <div> Network Connectivity     213 </div> <div> <br> </div> <div>     Connecting an External Bridge Network     213 </div> <div> <br> </div> <div>     Connecting an External Routed Network     218 </div> <div> <br> </div> <div> Diagnosing Connectivity Problems     242 </div> <div> <br> </div> <div> Summary     245 </div> <div> <br> </div> <div> Review Questions     245 </div> <div> <br> </div> <div> Chapter 6  VMM Integration     249 </div> <div> <br> </div> <div> Virtual Machine Manager (VMM)     249 </div> <div> <br> </div> <div>     VMM Domain Policy Model     250 </div> <div> <br> </div> <div>     VMM Domain Components     250 </div> <div> <br> </div> <div>     VMM Domains     250 </div> <div> <br> </div> <div>     VMM Domain VLAN Pool Association     252 </div> <div> <br> </div> <div> VMware Integration     257 </div> <div> <br> </div> <div>     Prerequisites for VMM Integration with AVS or VDS     257 </div> <div> <br> </div> <div>     Guidelines and Limitations for VMM Integration with AVS or VDS     257 </div> <div> <br> </div> <div>     ACI VMM Integration Workflow     258 </div> <div> <br> </div> <div>     Publishing EPGs to a VMM Domain     258 </div> <div> <br> </div> <div>     Connecting Virtual Machines to the Endpoint Group Port Groups on vCenter     259 </div> <div> <br> </div> <div>     Verifying VMM Integration with the AVS or VDS     259 </div> <div> <br> </div> <div> Microsoft SCVMM Integration     260 </div> <div> <br> </div> <div>     Mapping ACI and SCVMM Constructs     261 </div> <div> <br> </div> <div>     Mapping Multiple SCVMMs to an APIC     262 </div> <div> <br> </div> <div>     Verifying That the OpFlex Certificate Is Deployed for a Connection from the SCVMM to the APIC     262 </div> <div> <br> </div> <div>     Verifying VMM Deployment from the APIC to the SCVMM     263 </div> <div> <br> </div> <div> OpenStack Integration     263 </div> <div> <br> </div> <div>     Extending OpFlex to the Compute Node     264 </div> <div> <br> </div> <div>     ACI with OpenStack Physical Architecture     264 </div> <div> <br> </div> <div>     OpFlex Software Architecture     265 </div> <div> <br> </div> <div>     OpenStack Logical Topology     265 </div> <div> <br> </div> <div>     Mapping OpenStack and ACI Constructs     266 </div> <div> <br> </div> <div> Kubernetes Integration     272 </div> <div> <br> </div> <div>     Planning for Kubernetes Integration     272 </div> <div> <br> </div> <div>     Prerequisites for Integrating Kubernetes with Cisco ACI     273 </div> <div> <br> </div> <div>     Provisioning Cisco ACI to Work with Kubernetes     274 </div> <div> <br> </div> <div>     Preparing the Kubernetes Nodes     277 </div> <div> <br> </div> <div>     Installing Kubernetes and Cisco ACI Containers     279 </div> <div> <br> </div> <div>     Verifying the Kubernetes Integration     280 </div> <div> <br> </div> <div> OpenShift Integration     281 </div> <div> <br> </div> <div>     Planning for OpenShift Integration     282 </div> <div> <br> </div> <div>     Prerequisites for Integrating OpenShift with Cisco ACI     283 </div> <div> <br> </div> <div>     Provisioning Cisco ACI to Work with OpenShift     284 </div> <div> <br> </div> <div>     Preparing the OpenShift Nodes     287 </div> <div> <br> </div> <div>     Installing OpenShift and Cisco ACI Containers     290 </div> <div> <br> </div> <div>     Updating the OpenShift Router to Use the ACI Fabric     291 </div> <div> <br> </div> <div>     Verifying the OpenShift Integration     291 </div> <div> <br> </div> <div> VMM Integration with ACI at Multiple Locations     292 </div> <div> <br> </div> <div>     Multi-Site     292 </div> <div> <br> </div> <div>     Remote Leaf     295 </div> <div> <br> </div> <div> Summary     298 </div> <div> <br> </div> <div> Chapter 7  L4/L7 Service Integration     299 </div> <div> <br> </div> <div> Service Insertion     299 </div> <div> <br> </div> <div> The Service Graph     300 </div> <div> <br> </div> <div>     Managed Mode Versus Un-Managed Mode     301 </div> <div> <br> </div> <div>     L4–L7 Integration Use Cases     302 </div> <div> <br> </div> <div>     How Contracts Work in ACI     303 </div> <div> <br> </div> <div>     The Shadow EPG     306 </div> <div> <br> </div> <div>     Configuring the Service Graph     307 </div> <div> <br> </div> <div>     Service Graph Design and Deployment Options     312 </div> <div> <br> </div> <div> Policy-Based Redirect (PBR)     322 </div> <div> <br> </div> <div>     PBR Design Considerations     323 </div> <div> <br> </div> <div>     PBR Design Scenarios     324 </div> <div> <br> </div> <div>     Configuring the PBR Service Graph     325 </div> <div> <br> </div> <div>     Service Node Health Check     326 </div> <div> <br> </div> <div>     Common Issues in the PBR Service Graph     328 </div> <div> <br> </div> <div> L4/L7 Service Integration in Multi-Pod and Multi-Site     332 </div> <div> <br> </div> <div>     Multi-Pod     332 </div> <div> <br> </div> <div>     Multi-Site     338 </div> <div> <br> </div> <div> Review Questions     342 </div> <div> <br> </div> <div> Chapter 8  Automation and Orchestration     343 </div> <div> <br> </div> <div> The Difference Between Automation and Orchestration     343 </div> <div> <br> </div> <div>     Benefits of Automation and Orchestration     344 </div> <div> <br> </div> <div> REST API     349 </div> <div> <br> </div> <div> Automating Tasks Using the Native REST API: JSON and XML     351 </div> <div> <br> </div> <div>     API Inspector     351 </div> <div> <br> </div> <div>     Object (Save As)     353 </div> <div> <br> </div> <div>     Visore (Object Store Browser)     355 </div> <div> <br> </div> <div>     MOQuery     357 </div> <div> <br> </div> <div>     Automation Use Cases     364 </div> <div> <br> </div> <div> Automating Tasks Using Ansible     372 </div> <div> <br> </div> <div>     Ansible Support in ACI     375 </div> <div> <br> </div> <div>     Installing Ansible and Ensuring a Secure Connection     378 </div> <div> <br> </div> <div>     APIC Authentication in Ansible     382 </div> <div> <br> </div> <div>     Automation Use Cases     384 </div> <div> <br> </div> <div> Orchestration Through UCS Director     392 </div> <div> <br> </div> <div>     Management Through Cisco UCS Director     392 </div> <div> <br> </div> <div>     Automation and Orchestration with Cisco UCS Director     393 </div> <div> <br> </div> <div>     Automation Use Cases     395 </div> <div> <br> </div> <div> Summary     402 </div> <div> <br> </div> <div> Review Questions     402 </div> <div> <br> </div> <div> PART II:  MONITORING AND MANAGEMENT BEST PRACTICES </div> <div> <br> </div> <div> Chapter 9  Monitoring ACI Fabric     405 </div> <div> <br> </div> <div> Importance of Monitoring     405 </div> <div> <br> </div> <div> Faults and Health Scores     407 </div> <div> <br> </div> <div> Faults     407 </div> <div> <br> </div> <div> Health Scores     411 </div> <div> <br> </div> <div> ACI Internal Monitoring Tools     415 </div> <div> <br> </div> <div>     SNMP     415 </div> <div> <br> </div> <div>     Syslog     420 </div> <div> <br> </div> <div>     NetFlow     426 </div> <div> <br> </div> <div> ACI External Monitoring Tools     430 </div> <div> <br> </div> <div>     Network Insights     430 </div> <div> <br> </div> <div>     Network Assurance Engine     437 </div> <div> <br> </div> <div>     Tetration     453 </div> <div> <br> </div> <div> Monitoring Through the REST API     473 </div> <div> <br> </div> <div>     Monitoring an APIC     475 </div> <div> <br> </div> <div> Monitoring Leafs and Spines     482 </div> <div> <br> </div> <div>     Monitoring Applications     499 </div> <div> <br> </div> <div> Summary     505 </div> <div> <br> </div> <div> Review Questions     506 </div> <div> <br> </div> <div> Chapter 10  Network Management and Monitoring Configuration     509 </div> <div> <br> </div> <div> Out-of-Band Management     509 </div> <div> <br> </div> <div>     Creating Static Management Addresses     510 </div> <div> <br> </div> <div>     Creating the Management Contract     510 </div> <div> <br> </div> <div>     Choosing the Node Management EPG     513 </div> <div> <br> </div> <div>     Creating an External Management Entity EPG     513 </div> <div> <br> </div> <div>     Verifying the OOB Management Configuration     515 </div> <div> <br> </div> <div> In-Band Management     517 </div> <div> <br> </div> <div>     Creating a Management Contract     517 </div> <div> <br> </div> <div>     Creating Leaf Interface Access Policies for APIC INB Management     518 </div> <div> <br> </div> <div>     Creating Access Policies for the Border Leaf(s) Connected to L3Out     520 </div> <div> <br> </div> <div>     Creating INB Management External Routed Networks (L3Out)     522 </div> <div> <br> </div> <div>     Creating External Management EPGs     524 </div> <div> <br> </div> <div>     Creating an INB BD with a Subnet     527 </div> <div> <br> </div> <div>     Configuring the Node Management EPG     529 </div> <div> <br> </div> <div>     Creating Static Management Addresses     530 </div> <div> <br> </div> <div>     Verifying the INB Management Configuration     530 </div> <div> <br> </div> <div> AAA     533 </div> <div> <br> </div> <div>     Configuring Cisco Secure ACS     533 </div> <div> <br> </div> <div>     Configuring Cisco ISE     542 </div> <div> <br> </div> <div>     Configuring AAA in ACI     547 </div> <div> <br> </div> <div>     Recovering with the Local Fallback User     550 </div> <div> <br> </div> <div>     Verifying the AAA Configuration     550 </div> <div> <br> </div> <div> Syslog     551 </div> <div> <br> </div> <div>     Verifying the Syslog Configuration and Functionality     555 </div> <div> <br> </div> <div> SNMP     556 </div> <div> <br> </div> <div>     Verifying the SNMP Configuration and Functionality     562 </div> <div> <br> </div> <div> SPAN     566 </div> <div> <br> </div> <div>     Access SPAN     567 </div> <div> <br> </div> <div>     Fabric SPAN     571 </div> <div> <br> </div> <div>     Tenant SPAN     572 </div> <div> <br> </div> <div>     Ensuring Visibility and Troubleshooting SPAN     575 </div> <div> <br> </div> <div>     Verifying the SPAN Configuration and Functionality     576 </div> <div> <br> </div> <div> NetFlow     577 </div> <div> <br> </div> <div>     NetFlow with Access Policies     580 </div> <div> <br> </div> <div>     NetFlow with Tenant Policies     582 </div> <div> <br> </div> <div>     Verifying the NetFlow Configuration and Functionality     585 </div> <div> <br> </div> <div> Summary     587 </div> <div> <br> </div> <div> PART III:  ADVANCED FORWARDING AND TROUBLESHOOTING TECHNIQUES </div> <div> <br> </div> <div> Chapter 11  ACI Topology     589 </div> <div> <br> </div> <div> Physical Topology     589 </div> <div> <br> </div> <div> APIC Initial Setup     593 </div> <div> <br> </div> <div> Fabric Access Policies     595 </div> <div> <br> </div> <div>     Switch Profiles, Switch Policies, and Interface Profiles     595 </div> <div> <br> </div> <div>     Interface Policies and Policy Groups     596 </div> <div> <br> </div> <div>     Pools, Domains, and AAEPs     597 </div> <div> <br> </div> <div> VMM Domain Configuration     601 </div> <div> <br> </div> <div>     VMM Topology     601 </div> <div> <br> </div> <div> Hardware and Software Specifications     603 </div> <div> <br> </div> <div> Logical Layout of EPGs, BDs, VRF Instances, and Contracts     605 </div> <div> <br> </div> <div>     L3Out Logical Layout     606 </div> <div> <br> </div> <div> Summary     608 </div> <div> <br> </div> <div> Review Key Topics     608 </div> <div> <br> </div> <div> References     609 </div> <div> <br> </div> <div> Chapter 12  Bits and Bytes of ACI Forwarding     611 </div> <div> <br> </div> <div> Limitations of Traditional Networks and the Evolution of Overlay Networks     611 </div> <div> <br> </div> <div> High-Level VXLAN Overview     613 </div> <div> <br> </div> <div> IS-IS, TEP Addressing, and the ACI Underlay     615 </div> <div> <br> </div> <div>     IS-IS and TEP Addressing     615 </div> <div> <br> </div> <div>     FTags and the MDT     618 </div> <div> <br> </div> <div> Endpoint Learning in ACI     626 </div> <div> <br> </div> <div>     Endpoint Learning in a Layer 2–Only Bridge Domain     627 </div> <div> <br> </div> <div>     Endpoint Learning in a Layer 3–Enabled Bridge Domain     635 </div> <div> <br> </div> <div>     Fabric Glean     640 </div> <div> <br> </div> <div>     Remote Endpoint Learning     641 </div> <div> <br> </div> <div>     Endpoint Mobility     645 </div> <div> <br> </div> <div>     Anycast Gateway     647 </div> <div> <br> </div> <div>     Virtual Port Channels in ACI     649 </div> <div> <br> </div> <div> Routing in ACI     651 </div> <div> <br> </div> <div>     Static or Dynamic Routes     651 </div> <div> <br> </div> <div>     Learning External Routes in the ACI Fabric     656 </div> <div> <br> </div> <div>     Transit Routing     659 </div> <div> <br> </div> <div> Policy Enforcement     661 </div> <div> <br> </div> <div>     Shared Services     664 </div> <div> <br> </div> <div>     L3Out Flags     668 </div> <div> <br> </div> <div> Quality of Service (QoS) in ACI     669 </div> <div> <br> </div> <div>     Externally Set DSCP and CoS Markings     671 </div> <div> <br> </div> <div> CoS Preservation in ACI     672 </div> <div> <br> </div> <div> Multi-Pod     674 </div> <div> <br> </div> <div> Multi-Site     680 </div> <div> <br> </div> <div> Remote Leaf     684 </div> <div> <br> </div> <div> Forwarding Scenarios     686 </div> <div> <br> </div> <div>     ARP Flooding     686 </div> <div> <br> </div> <div>     Layer 2 Known Unicast     688 </div> <div> <br> </div> <div>     ARP Optimization     690 </div> <div> <br> </div> <div>     Layer 2 Unknown Unicast Proxy     690 </div> <div> <br> </div> <div>     L3 Policy Enforcement When Going to L3Out     693 </div> <div> <br> </div> <div>     L3 Policy Enforcement for External Traffic Coming into the Fabric     695 </div> <div> <br> </div> <div> Route Leaking/Shared Services     695 </div> <div> <br> </div> <div>     Consumer to Provider     695 </div> <div> <br> </div> <div>     Provider to Consumer     698 </div> <div> <br> </div> <div> Multi-Pod Forwarding Examples     698 </div> <div> <br> </div> <div>     ARP Flooding     700 </div> <div> <br> </div> <div>     Layer 3 Proxy Flow     700 </div> <div> <br> </div> <div> Multi-Site Forwarding Examples     703 </div> <div> <br> </div> <div>     ARP Flooding     703 </div> <div> <br> </div> <div>     Layer 3 Proxy Flow     705 </div> <div> <br> </div> <div> Remote Leaf     707 </div> <div> <br> </div> <div>     ARP Flooding     707 </div> <div> <br> </div> <div>     Layer 3 Proxy Flow     710 </div> <div> <br> </div> <div> Summary     713 </div> <div> <br> </div> <div> Review Key Topics     713 </div> <div> <br> </div> <div> References     714 </div> <div> <br> </div> <div> Review Questions     714 </div> <div> <br> </div> <div> Chapter 13  Troubleshooting Techniques     717 </div> <div> <br> </div> <div> General Troubleshooting     717 </div> <div> <br> </div> <div>     Faults, Events, and Audits     718 </div> <div> <br> </div> <div>     moquery     722 </div> <div> <br> </div> <div>     iCurl     724 </div> <div> <br> </div> <div>     Visore     726 </div> <div> <br> </div> <div> Infrastructure Troubleshooting     727 </div> <div> <br> </div> <div>     APIC Cluster Troubleshooting     727 </div> <div> <br> </div> <div>     Fabric Node Troubleshooting     734 </div> <div> <br> </div> <div> How to Verify Physical- and Platform-Related Issues     737 </div> <div> <br> </div> <div>     Counters     737 </div> <div> <br> </div> <div>     CPU Packet Captures     743 </div> <div> <br> </div> <div>     SPAN     748 </div> <div> <br> </div> <div> Troubleshooting Endpoint Connectivity     751 </div> <div> <br> </div> <div>     Endpoint Tracker and Log Files     752 </div> <div> <br> </div> <div>     Enhanced Endpoint Tracker (EPT) App     756 </div> <div> <br> </div> <div>     Rogue Endpoint Detection     758 </div> <div> <br> </div> <div> Troubleshooting Contract-Related Issues     759 </div> <div> <br> </div> <div>     Verifying Policy Deny Drops     764 </div> <div> <br> </div> <div> Embedded Logic Analyzer Module (ELAM)     765 </div> <div> <br> </div> <div> Summary     769 </div> <div> <br> </div> <div> Review Key Topics     769 </div> <div> <br> </div> <div> Review Questions     769 </div> <div> <br> </div> <div> Chapter 14  The ACI Visibility & Troubleshooting Tool     771 </div> <div> <br> </div> <div> Visibility & Troubleshooting Tool Overview     771 </div> <div> <br> </div> <div> Faults Tab     772 </div> <div> <br> </div> <div> Drop/Stats Tab     773 </div> <div> <br> </div> <div>     Ingress/Egress Buffer Drop Packets     774 </div> <div> <br> </div> <div>     Ingress Error Drop Packets Periodic     774 </div> <div> <br> </div> <div>     Storm Control     774 </div> <div> <br> </div> <div>     Ingress Forward Drop Packets     775 </div> <div> <br> </div> <div>     Ingress Load Balancer Drop Packets     776 </div> <div> <br> </div> <div> Contract Drops Tab     777 </div> <div> <br> </div> <div>     Contracts     777 </div> <div> <br> </div> <div>     Contract Considerations     778 </div> <div> <br> </div> <div> Events and Audits Tab     779 </div> <div> <br> </div> <div> Traceroute Tab     780 </div> <div> <br> </div> <div> Atomic Counter Tab     782 </div> <div> <br> </div> <div> Latency Tab     785 </div> <div> <br> </div> <div> SPAN Tab     786 </div> <div> <br> </div> <div> Network Insights Resources (NIR) Overview     787 </div> <div> <br> </div> <div> Summary     790 </div> <div> <br> </div> <div> Chapter 15  Troubleshooting Use Cases     791 </div> <div> <br> </div> <div> Troubleshooting Fabric Discovery: Leaf Discovery     792 </div> <div> <br> </div> <div> Troubleshooting APIC Controllers and Clusters: Clustering     795 </div> <div> <br> </div> <div> Troubleshooting Management Access: Out-of-Band EPG     799 </div> <div> <br> </div> <div> Troubleshooting Contracts: Traffic Not Traversing a Firewall as Expected     801 </div> <div> <br> </div> <div> Troubleshooting Contracts: Contract Directionality     804 </div> <div> <br> </div> <div> Troubleshooting End Host Connectivity: Layer 2 Traffic Flow Through ACI     807 </div> <div> <br> </div> <div> Troubleshooting External Layer 2 Connectivity: Broken Layer 2 Traffic Flow Through ACI     812 </div> <div> <br> </div> <div> Troubleshooting External Layer 3 Connectivity: Broken Layer 3 Traffic Flow Through ACI     814 </div> <div> <br> </div> <div> Troubleshooting External Layer 3 Connectivity: Unexpected Layer 3 Traffic Flow Through ACI     816 </div> <div> <br> </div> <div> Troubleshooting Leaf and Spine Connectivity: Leaf Issue     821 </div> <div> <br> </div> <div> Troubleshooting VMM Domains: VMM Controller Offline     826 </div> <div> <br> </div> <div> Troubleshooting VMM Domains: VM Connectivity Issue After Deploying the VMM Domain     829 </div> <div> <br> </div> <div> Troubleshooting L4–L7: Deploying an L4–L7 Device     832 </div> <div> <br> </div> <div> Troubleshooting L4–L7: Control Protocols Stop Working After Service Graph Deployment     834 </div> <div> <br> </div> <div> Troubleshooting Multi-Pod: BUM Traffic Not Reaching Remote Pods     837 </div> <div> <br> </div> <div> Troubleshooting Multi-Pod: Remote L3Out Not Reachable     839 </div> <div> <br> </div> <div> Troubleshooting Multi-Site: Using Consistency Checker to Verify State at Each Site     841 </div> <div> <br> </div> <div> Troubleshooting Programmability Issues: JSON Script Generates Error     844 </div> <div> <br> </div> <div> Troubleshooting Multicast Issues: PIM Sparse Mode Any-Source Multicast (ASM)     846 </div> <div> <br> </div> <div> Summary     860 </div> <div> <br> </div> <div> Appendix A  Answers to Chapter Review Questions     861 </div> <div> <br> </div> <div> Index     873 </div> <div> <br> </div>

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