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General| Type | Virtual Switch |
|---|---|
| Manageable | Yes |
| NetFlow | Yes |
| SPAN | Yes |
| ERSPAN | Yes |
| Operating System | Cisco NX-OS |
| Form Factor | Virtual |
| Hypervisor Support | VMware ESXi |
| Features | VXLAN |
| Security Features | Port Security, Private VLANs, ACLs |
Outlines the steps to follow to troubleshoot network problems, focusing on information gathering and systematic elimination.
Provides recommendations for ensuring proper network operation, including maintaining consistent releases and enabling logging.
Introduces questions to ask when troubleshooting problems to identify scope and plan actions.
Highlights tools and techniques for gathering information to troubleshoot network problems effectively.
Provides questions to verify the status and connectivity of physical and virtual Ethernet ports.
Offers questions to verify Layer 2 connectivity, including VLANs and port channel configurations.
Provides questions to verify Layer 3 connectivity, focusing on gateway configuration.
Explains the symptom-based troubleshooting approach and lists common observable symptoms and corrective actions.
Describes how system messages (syslog) are sent and their role in diagnosing system issues.
Details how to configure a Cisco Nexus 1000V to use a syslog facility for message logging.
Explains how to view system messages to determine events leading to current problems.
Guides users on what information to prepare and how to contact support for unresolved issues.
Explains the use of the Command Line Interface (CLI) and context-sensitive help for managing the Nexus 1000V.
Describes the ping utility for verifying connectivity and latency to a destination across an IP network.
Details the traceroute utility for tracing routes, computing hop-to-hop latency, and testing connectivity.
Explains how the CLI can be used to monitor switch processes, CPU status, and utilization.
Describes the `show processes` command to identify running processes and their states (PID, State, PC, TTY, Process).
Explains how to use the `show processes cpu` command to display CPU utilization metrics.
Details how to use `show system resources` to display system-related CPU and memory statistics.
Defines RADIUS as a protocol for exchanging credentials between a RADIUS server and a client device.
Describes the system message logging software that saves messages in a log file or directs them to other devices.
Explains how to isolate potential issues encountered during the installation process.
Details how to verify that the ESX server has the necessary VMware Enterprise Plus license for DVS.
Addresses issues where hosts do not appear in the vCenter Client Add Host dialog box.
Provides steps to refresh the connection between the Cisco Nexus 1000V and vCenter Server.
Explains how to verify the unique domain ID configuration required for VSM-VEM communication.
Details how to verify the correct creation and assignment of Control, Packet, and Management Port Groups.
Provides guidelines to troubleshoot connectivity issues between the VSM and vCenter Server.
Offers steps to troubleshoot connection issues between a Cisco Nexus 1000V VSM and a vCenter Server.
Covers troubleshooting issues related to extension keys and plug-ins for vCenter integration.
Provides a table to troubleshoot and resolve known issues with plug-ins and extensions.
Outlines a procedure to resolve plug-in conflicts when a Nexus 1000V plug-in is already registered.
Explains how to find the extension key on the Cisco Nexus 1000V VSM CLI.
Describes how to find the extension key tied to a specific Distributed Virtual Switch (DVS) in vSphere Client.
Provides steps to verify that the Cisco Nexus 1000V and vCenter Server are using the same extension key.
Explains how to re-create the complete Cisco Nexus 1000V configuration in case of persistent problems.
Details the procedure to remove hosts from the Cisco Nexus 1000V Distributed Virtual Switch (DVS).
Describes how to remove the Cisco Nexus 1000V DVS from the vCenter Server.
Explains how to unregister the Cisco Nexus 1000V extension key in the vCenter Server.
Lists possible problems and their solutions related to the Cisco Nexus 1000V Installation Management Center.
Provides information about the Cisco Nexus 1000V license package, version, and licensing basis.
Lists verification steps before troubleshooting license issues, including file names and host IDs.
Details symptoms, causes, and solutions for common license problems, such as VEM unlicensed status.
Lists commands used to troubleshoot problems related to licenses, including usage and module information.
Describes the upgrade process for VSM and VEM software, including In-Service Software Upgrade (ISSU).
Details symptoms, causes, and solutions for issues encountered during In-Service Software Upgrade (ISSU).
Addresses symptoms, causes, and solutions for problems that occur during VEM software upgrades.
Covers symptoms, causes, and solutions for issues encountered when using the GUI upgrade application.
Guides users on how to recover a secondary VSM when the primary VSM is active.
Details how to recover a primary VSM when the secondary VSM is active.
Lists commands used to troubleshoot problems related to software upgrades.
Explains the purpose of High Availability (HA) and the components of the Cisco Nexus 1000V system for HA.
Describes redundant VSM virtual machines operating as an HA pair for active/standby capacity.
Explains how port channels and LACP contribute to network-level high availability.
Details symptoms, causes, and solutions for common High Availability problems.
Lists commands that can be used to troubleshoot problems related to high availability.
Explains how the Cisco Nexus 1000V manages data centers and its two main components: VSM and VEM.
Provides guidelines and steps to troubleshoot situations where modules (VEMs) do not come up on the VSM.
Offers guidelines for troubleshooting modules, including checking vCenter Server, network connectivity, and extension keys.
Presents a flowchart to guide the troubleshooting process for modules not coming up on the VSM.
Details symptoms, causes, and solutions for common problems encountered with the Virtual Supervisor Module (VSM).
Provides a procedure to verify that the VSM is successfully connected to the vCenter Server.
Guides users on verifying the domain configuration, system port profiles, and VLAN configurations on the VSM.
Explains how to verify the SVS domain configuration, including control and packet VLAN presence.
Details how to verify the system port profile configuration, ensuring control and packet VLANs are assigned.
Describes how to verify that control and packet VLANs are correctly configured on the VSM.
Explains how to verify the configuration within the vCenter Server for proper operation.
Provides steps to verify Layer 2 network connectivity between the VSM and the VEM.
Details how to verify the ESX host received the VEM configuration and setup.
Describes the procedure to collect log files to help identify problems related to VEM and VSM connectivity.
Lists commands that can be used to troubleshoot problems related to the VSM.
Provides symptoms, causes, and solutions for troubleshooting L3Sec issues.
Explains the characteristics of interfaces, including administrative configuration and operational state.
Defines interface characteristics such as administrative configuration and operational state.
Explains the use of port counters to identify synchronization problems and display interface counters.
Defines link flapping and provides information for troubleshooting unexpected link flapping.
Describes the port security feature for securing ports by limiting and identifying MAC addresses.
Provides a checklist to diagnose port interface activity, including module status and VSM connectivity.
Details symptoms, causes, and solutions for various port-related problems.
Addresses issues where an interface cannot be enabled, listing possible causes and solutions.
Details possible causes and solutions for port link failures or ports not being connected.
Explains possible causes and solutions for ports that repeatedly go up and down (flapping).
Covers possible causes and solutions when a port enters the ErrDisabled state.
Addresses issues where a VM cannot ping a secured port, listing causes and verification steps.
Details possible causes and solutions for port security violations, such as exceeding maximum secured addresses.
Covers possible causes and solutions when a port's state is blocked on a VEM, often related to VLANs or licensing.
Lists commands used to troubleshoot problems related to ports.
Explains the use of port profiles for configuring interfaces and their representation as port groups in vCenter Server.
Details symptoms, causes, and solutions for problems related to port profiles, including visibility and configuration issues.
Describes commands to enable and collect detailed logs for port profiles.
Lists commands used to troubleshoot problems related to port profiles.
Describes how port channels aggregate physical interfaces and how trunking enables multiple VLANs over a single link.
Explains how port channels aggregate physical interfaces for higher bandwidth, load balancing, and link redundancy.
Defines trunking as enabling interconnected ports to transmit frames across multiple VLANs over the same link.
Provides a checklist to begin troubleshooting port channel and trunking issues.
Lists restrictions for port channels, including unsupported ACLs and NetFlow.
Provides guidelines for troubleshooting asymmetric port channels, focusing on APC and CDP.
Addresses issues where a port channel cannot be created, possibly due to reaching the system limit.
Covers symptoms and solutions when a newly added interface does not come online in a port channel.
Explains how to manually force physical interface characteristics to match the port channel group.
Guides users on debugging port channels configured through a port profile.
Addresses symptoms and solutions when VLAN traffic does not traverse a trunk, often due to missing VLANs in the allowed list.
Describes the Cisco Nexus 1000V as a Layer 2 virtual switch and its components: VSM and VEM.
Explains the port model, including virtual and physical ports mapped within VEMs.
Illustrates how ports are mapped within VEMs, showing virtual NICs, VEth ports, and local vEth ports.
Shows the VSM view of ports, explaining vmnic, uplink port, and physical Ethernet port concepts.
Details the available port types: vEths, Eths (physical Ethernet), and Po (port channel interfaces).
Lists troubleshooting commands and guides for identifying and resolving Layer 2 switching problems.
Provides steps to verify a connection between two vEth ports on a VEM, checking VLAN states.
Guides users on verifying connections between vEth ports on two separate VEMs.
Explains how to isolate causes for no traffic passing across VMs on different VEMs.
Provides steps and limitations for troubleshooting Microsoft Network Load Balancing (MS-NLB) in unicast mode.
Explains BPDU Guard and provides commands to troubleshoot its configuration and status.
Lists commands used to troubleshoot problems related to BPDU Guard configuration.
Explains how VLANs isolate devices and recommends naming conventions and guidelines.
Provides a checklist for troubleshooting VLAN problems, focusing on physical connectivity and VLAN membership.
Addresses the inability to create a VLAN, often due to using a reserved VLAN ID.
Explains Private VLANs (PVLANs) for Layer 2 traffic segregation and device isolation.
Defines a private VLAN domain as consisting of primary and secondary VLAN pairs for subdomain creation.
Discusses how Private VLANs can span multiple switches, maintaining consistent behavior across inter-switch links.
Provides guidelines for troubleshooting private VLAN issues, including verifying VLAN configuration and interface status.
Lists commands used to troubleshoot problems related to private VLANs.
Explains NetFlow for evaluating IP traffic, gathering data for accounting, monitoring, and planning.
Lists commands to collect information about NetFlow process runtime configuration errors.
Details common NetFlow configuration problems and potential solutions.
Guides users on debugging policy verification failures due to processing on the VSM.
Provides guidelines for debugging NetFlow statistics export problems.
Explains ACLs as ordered sets of rules for filtering traffic and the types of ACLs supported.
Lists the configuration limits that apply to ACLs, such as the maximum number of rules.
Details the restrictions that apply to ACLs, such as the inability to apply multiple IP/MAC ACLs or support for IP fragments.
Lists commands used on the VSM to view policies and collect ACLMGR/ACLCOMP process information.
Explains how to display configured ACL policies on the Virtual Ethernet Module (VEM).
Guides users on debugging policy verification failures, applicable to older VEM releases.
Describes situations encountered when using ACL logging and how to troubleshoot them.
Explains QoS for classifying, policing, and prioritizing network traffic to prevent congestion.
Lists the configuration limits for QoS, including DVS and Per Server limits for Class maps and Policy maps.
Lists commands used on the VSM to view policies and class-maps, and check resource limits.
Details how to display configured QoS policies on the VEM using VEM commands.
Guides users on debugging policy configuration failures caused by processing on the VSM.
Provides steps to debug policy verification failures on the VEM.
Guides users on debugging policy verification failures caused by processing on the VSM.
Explains the Switched Port Analyzer (SPAN) feature for network traffic analysis and its two types: local and ERSPAN.
Lists guidelines for running SPAN sessions, including requirements and potential issues after VMotion.
Details symptoms, causes, and solutions for problems encountered with SPAN sessions.
Lists commands used to troubleshoot problems related to SPAN sessions.
Explains IP multicast as a method for forwarding IP packets to multiple hosts.
Describes IGMP snooping software for examining Layer 2 IP multicast traffic and reducing bandwidth consumption.
Details symptoms, causes, and solutions for problems related to multicast IGMP snooping.
Provides guidelines for troubleshooting multicast IGMP issues, including verifying snooping and group commands.
Explains how to enable debugging commands for IGMP snooping.
Explains DHCP snooping's role as a firewall between untrusted hosts and DHCP servers.
Describes Dynamic ARP Inspection (DAI) for validating ARP requests and responses on untrusted ports.
Explains IP Source Guard as a traffic filter that permits IP traffic based on IP and MAC address bindings.
Lists guidelines and limitations for troubleshooting DHCP snooping, DAI, and IP Source Guard.
Details symptoms, causes, and solutions for problems encountered with DHCP snooping.
Addresses possible causes and solutions for dropped ARP responses, often related to inspection or snooping configurations.
Details symptoms, causes, and solutions for problems related to IP Source Guard.
Provides commands to collect and view logs related to DHCP, DAI, and IP Source Guard.
Lists VSM commands for collecting and viewing logs related to DHCP, DAI, and IP Source Guard.
Lists commands used to troubleshoot problems related to DHCP snooping, DAI, and IP Source Guard.
Explains the traffic storm control feature to prevent disruptions from broadcast, multicast, or unknown-unicast traffic storms.
Describes troubleshooting commands for debugging Storm Control.
Lists commands for displaying detailed storm control statistics on an interface and module.
Lists commands for displaying statistics related to broadcast, multicast, and unknown unicast traffic on VEMs.
Provides steps to debug storm control on a VEM using vemlog commands.
Describes the Cisco Nexus 1000V as a Layer 2 switch for virtualized server environments.
Outlines restrictions to observe when troubleshooting issues related to vCenter Server.
Explains the VSM's use of a unique extension key for vCenter Server communication.
Provides procedures to recover a Distributed Virtual Switch (DVS) if the VSM VM is lost or needs replacement.
Details how to recover a DVS using a previously saved backup copy of the VSM configuration file.
Outlines how to recover a DVS when a backup copy of the VSM configuration file was not previously saved.
Details symptoms and solutions for connectivity problems between the VSM and vCenter Server.
Addresses connection loss between VSM and VEM after ESX reboots, often due to MTU mismatch.
Provides a procedure to set a system MTU in existing system uplink port profiles to prevent MTU mismatch issues.
Details how to recover lost connectivity due to an MTU mismatch between physical and kernel NICs after ESX reboot.
Explains the process of creating a VSM, including using port profiles and ensuring system VLAN configuration.
Details symptoms and solutions for problems with hosts, including DVS operation failures and module flaps.
Provides guidelines for troubleshooting intra-host VM traffic issues.
Lists commands to display VEM information, including kernel logs, configuration, and status.
Explains commands to control the vemlog, including starting, stopping, and clearing logs.
Lists common error messages seen on the VSM and their descriptions, often related to vCenter integration.
Provides information on accessing Cisco support communities for additional help.
Outlines steps to perform before contacting support to reduce resolution time.
Explains how to generate and send core dump files for system analysis by support engineers.
Describes how to move files to or from the switch, including logs, configurations, and firmware.
Refers to the Cisco Nexus 1000V Network Segmentation Manager Configuration Guide for more information.
Details symptoms, causes, and solutions for problems with Network Segmentation Manager (NSM).
Lists commands used to troubleshoot problems related to the Network Segmentation Manager (NSM).
Describes VXLANs for creating LAN segments using MAC-in-UDP encapsulation and a VXLAN ID.
Explains VXLANs as creating LAN segments via overlay with MAC-in-UDP encapsulation and VXLAN ID.
Defines the VXLAN Tunnel End Point (VTEP) IP/MAC addresses required for each VEM to terminate VXLAN packets.
Explains VXLAN termination (encapsulation/decapsulation) support on virtual switches, noting feature deprecation.
Describes VXLAN trunks allowing multiple VXLANs on a single virtual Ethernet interface via VXLAN-VLAN mapping.
Explains how BGP enables Cisco Nexus 1000V to exchange VXLAN information across VSMs for VXLAN segments.
Lists commands used to display VXLAN attributes.
Provides commands to debug VXLAN traffic from VM on VEM1 to VM on VEM2.
Provides commands to debug VEM multicast traffic.
Lists commands to troubleshoot VXLAN problems, covering vemlog, vempkt, statistics, and show commands.
Explains VDP as an IEEE standard for detecting end hosts and exchanging capability with adjacent bridges.
Details symptoms, causes, and solutions for problems related to VDP.
Lists commands used to troubleshoot problems related to VDP.
Lists commands used in the VSM section to troubleshoot VDP-related problems.
Lists VEM commands used to troubleshoot problems related to VDP.
Describes Cisco TrustSec's security architecture for building secure networks with trusted devices.
Contains topics on debugging commands, host logging, and show commands for Cisco TrustSec.
Lists commands for collecting and viewing logs related to Cisco TrustSec authentication, authorization, errors, and messages.
Provides commands for collecting and viewing logs related to host logging for TrustSec.
Lists show commands for Cisco TrustSec, covering configuration, SXP, device tracking, and event logs.
Details symptoms, causes, and solutions for problems with Cisco TrustSec, including SXP session issues and IP-SGT mapping.
Describes the Cisco Nexus 1000V vCenter Plug-in for managing networking aspects within VMware environments.
Lists prerequisites for configuring vCenter Plug-in functionality, including vCenter Server version and browser support.
Explains how to collect diagnostic information for VMware vCenter Server by generating a vSphere log bundle.
Describes Ethanalyzer as an NX-OS protocol analyzer tool for capturing and decoding packets.
