Cisco Systems NME-16ES-1G Clustering Concepts, Management Connectivity to Specific Stack Members

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Cisco EtherSwitch Service Modules Feature Guide

Information About the Cisco EtherSwitch Service Modules

Be careful when using multiple CLI sessions to the stack master. Commands that you enter in one session are not displayed in the other sessions. Therefore, it is possible that you might not be able to identify the session from which you entered a command.

Note We recommend using only one CLI session when you manage the switch stack.

Management Connectivity to Specific Stack Members

If you want to configure a specific stack member port, you must include the stack member number in the CLI command interface notation. For more information about interface notations, see the “Using Interface Configuration Mode” section on page 35.

To debug a specific stack member, you can access it from the stack master by using the session stack-member-numberprivileged EXEC command. The stack member number is appended to the system prompt. For example, Switch-2# is the prompt in privileged EXEC mode for stack member 2, and the system prompt for the stack master is Switch. Only the show and debug commands are available in a CLI session to a specific stack member.

Accessing the CLI of a Specific Stack Member

Note This task is available only from the stack master. This task is only for debugging purposes.

You can access all or specific stack members by using the remote command {all stack-member-number} privileged EXEC command. The stack member number range is 1 to 9.

Clustering Concepts

This section describes the concepts and procedures required to plan and create clusters on a Cisco EtherSwitch service module.

•Cluster Compatibility, page 21

•Command Device Characteristics, page 21

•Standby Command Device Characteristics, page 21

•Candidate and Member Characteristics, page 22

•Automatic Discovery of Candidates and Members, page 22

•Discovery of Candidates and Members Through CDP Hops, page 22

•Discovery of Candidates and Members Through Non-CDP-Capable and Noncluster-Capable Devices, page 23

•Discovery of Candidates and Members Through Different VLANs, page 24

•Discovery of Candidates and Members Through Different Management VLANs, page 24

•Discovery of Candidates and Members Through Routed Ports, page 25

•Discovery of Newly Installed Switches in Clusters, page 26

•HSRP and Standby Cluster Command Switches, page 27

•Virtual IP Addresses in Clusters, page 28

Cisco IOS Release 12.2(25)SEC

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Contents Guide Release ModificationContents Network Modules Hardware Installation Guide Hardware OverviewSoftware Features and Benefits Ease-of-Use and Ease-of-Deployment Features Performance FeaturesManagement Options Manageability Features Availability FeaturesVlan Features Security Features QoS and CoS Features Power-over-Ethernet Features Monitoring FeaturesOverview of Switch Stacks Cisco StackWise ConceptsSwitch Stack Membership Stack Master Election and Re-Election Switch Stack Bridge ID and Router MAC Address Stack Member NumbersStack Member Priority Values Switch Stack Software Compatibility Recommendations Stack Protocol Version CompatibilitySwitch Stack Configuration Files Switch Stack Management Connectivity Management Connectivity to Specific Stack Members Accessing the CLI of a Specific Stack MemberClustering Concepts Cluster Compatibility Command Device CharacteristicsStandby Command Device Characteristics Discovery of Candidates and Members Through CDP Hops Candidate and Member CharacteristicsAutomatic Discovery of Candidates and Members Vlan Discovery of Candidates and Members Through Different VLANs Switch Discovery of Candidates and Members Through Routed PortsDiscovery of Newly Installed Switches in Clusters New out-of-boxHsrp and Standby Cluster Command Switches Virtual IP Addresses in Clusters Other Considerations for Cluster Standby GroupsAutomatic Recovery of Cluster Configuration IP Addresses in Clusters Hostnames in ClustersPasswords in Clusters Switch Clusters and Switch StacksSwitch Stack Switch Cluster Snmp Community Strings in ClustersSwitch Stack Switch Cluster Availability of Switch-Specific Features in Switch Clusters TACACS+ and Radius in ClustersCisco IOS Release 12.225SEC Using Interface Configuration Mode Command or Action Purpose Boot flash image-nameExample Dir flashEnable Show running configurationConfigure terminal Service-module interface slot/port sessionShow power inline Output of the show service-module status commandShow ip interface brief Control+shift+6Sample Output for the dir flash Command on the Router Sample Output for the boot flash Command on the RouterRouter boot flashc2800-adventerprisek9-mz ExamplesRouter# show running config interface gigabitethernet2/0 Router# configure terminalRouter# service-module gigabitethernet2/0 session Switch dir flashSwitch# show ip interface brief Switch# ctrl+shift+6Switch# show power inline Sample Output for Pressing Ctrl+Shift+6 Followed byFeature Default Setting DhcpSTP Prerequisites Clustering Concepts section on Return Sample Output for Entering an Interface Name Sample Output for Assigning the IP Address and Subnet MaskSample Output for Saving the Configuration to Nvram Command or Action PurposeRouter# service-module gigabitethernet1/0 reload Router# service-module gigabitethernet1/0 shutdownRouter# service-module gigabitethernet1/0 reset Cisco IOS Release 12.225SEC Default Switch Stack Configuration RestrictionsAssigning a Stack Member Number Sample Output for the switch renumber Command Sample Output for the reload slot CommandShow switch Switchconfig# switch 6 renumberSetting the Stack Member Priority Value Sample Output for the show switch CommandVerifying Information About the Switch Stack Sample Output for the switch priority CommandSwitchconfig# switch 2 priority Switch show switchSwitch# show platform stack-manager all Switchconfig# show switch neighbors Show switch stack-portsShow version Using the CLI to Manage Switch ClustersRcommand Sample Output for the rcommand and show version Commands Sample Output for the show cluster members CommandChoose View Refresh Choose Cluster Add to Cluster or Password Cluster memberCreating a Cluster Standby Group Detailed Steps from the CLICluster standby-group HSRP-group-name Routing-redundancyNo switchport Sample Output for the ping tftpserver Command Sample Output for the show flash Command Sample Output for the copy tftp flash CommandSwitch# show flash Switch# copy tftp flashRecovering from a Corrupted Software Image Using Xmodem Service-module interface slot/port password-reset FlashinitService-module interface slot/port Password-resetFlashinit Control+6Router# copy flash xmodem TroubleshootingSample Output for the copy flash xmodem Command Sample Output for the copy tftp xmodem Command Router# copy tftp xmodemRouter# service-module gigabitethernet1/0 session Router# service-module gigabitethernet2/0 password-resetRecovering from a Lost or Forgotten Password Optional loadhelper filesystem/file-url Boot -x -v deviceimagename Enable secret passwordRename Copy flashCopy running-configuration startup-configuration ReloadOptional set Service-module password-reset command BootSet Sample Output for the set CommandExample Scenario Action Result Current-stack-member-number Renumber new-stack-member-number Network Configuration Examples Network Demands Suggested Design Methods Cost-Effective Wiring Closet Redundant Gigabit Backbone Cisco SoftPhone Software 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