Cisco Systems NME-16ES-1G manual Switch Stack Software Compatibility Recommendations

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Cisco EtherSwitch Service Modules Feature Guide

Information About the Cisco EtherSwitch Service Modules

Switch Stack Software Compatibility Recommendations

All stack members must run the same Cisco IOS software version to ensure compatibility between stack members.

We recommend the following:

•The Cisco IOS software version on all stack members, including the stack master, should be the same. This helps ensure full compatibility in the stack protocol version among the stack members.

•If your switch stack must have Cisco EtherSwitch service modules or switches running IP base images and IP services images, the Cisco EtherSwitch service module running the IP services image should be the stack master. IP services image features become unavailable to all stack members if the stack master is running the IP base image.

•At least two stack members should have the IP services image installed to ensure redundant support of the IP services image features. The IP services image has precedence over the IP base image during stack master election, assuming that the priority value of the stack members is the same. If the stack master running the IP services image fails, the other stack member running the IP services image becomes the stack master.

•When a Cisco EtherSwitch service module or switch running the IP services image joins a switch stack running the IP base image of the same version, the IP services image Cisco EtherSwitch service module or switch does not automatically become the stack master. If you want the Cisco EtherSwitch service module running the IP services image to become the stack master, reset the current stack master running the IP base image by using the reload slot stack-member-numberprivileged EXEC command. The Cisco EtherSwitch service module running the IP services image is elected the stack master, assuming its priority value is higher or the same as that of the other stack members.

Stack Protocol Version Compatibility

Each software image includes a stack protocol version. The stack protocol version has a major version number and a minor version number. Both version numbers determine the level of compatibility among the stack members. You can display the stack protocol version by using the show platform stack-manager all privileged EXEC command.

Cisco EtherSwitch service modules or switches with the same Cisco IOS software version have the same stack protocol version. Such modules are fully compatible, and all features function properly across the switch stack. Cisco EtherSwitch service modules or switches with the same Cisco IOS software version as the stack master join the switch stack immediately.

If an incompatibility exists, the incompatible stack members generate a system error message that describes the cause of the incompatibility on the specific stack members. The stack master displays the error message to all stack members.

These sections provide more detail about incompatibility in switch stacks:

•Major Incompatibility Between Cisco EtherSwitch Service Modules, page 17

•Minor Incompatibility Between Cisco EtherSwitch Service Modules, page 18

Major Incompatibility Between Cisco EtherSwitch Service Modules

Cisco EtherSwitch service modules or Catalyst 3750 switches with different Cisco IOS software versions most likely have different stack protocol versions. Cisco EtherSwitch service modules or Catalyst 3750 switches with different major stack protocol version numbers are incompatible and cannot exist in the same switch stack.

Cisco IOS Release 12.2(25)SEC

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Contents Release Modification GuideContents Hardware Overview Network Modules Hardware Installation GuideSoftware Features and Benefits Performance Features Ease-of-Use and Ease-of-Deployment FeaturesManagement Options Availability Features Manageability FeaturesVlan Features Security Features QoS and CoS Features Monitoring Features Power-over-Ethernet FeaturesCisco StackWise Concepts Overview of Switch StacksSwitch Stack Membership Stack Master Election and Re-Election Stack Member Numbers Switch Stack Bridge ID and Router MAC AddressStack Member Priority Values Stack Protocol Version Compatibility Switch Stack Software Compatibility RecommendationsSwitch 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 Discovery of Candidates and Members Through Routed Ports SwitchNew out-of-box Discovery of Newly Installed Switches in ClustersHsrp and Standby Cluster Command Switches Other Considerations for Cluster Standby Groups Virtual IP Addresses in ClustersAutomatic Recovery of Cluster Configuration Hostnames in Clusters IP Addresses in ClustersSwitch Clusters and Switch Stacks Passwords in ClustersSwitch Stack Switch Cluster Snmp Community Strings in ClustersSwitch Stack Switch Cluster TACACS+ and Radius in Clusters Availability of Switch-Specific Features in Switch ClustersCisco IOS Release 12.225SEC Using Interface Configuration Mode Boot flash image-name Command or Action PurposeExample Dir flashShow running configuration EnableConfigure terminal Service-module interface slot/port sessionOutput of the show service-module status command Show power inlineShow ip interface brief Control+shift+6Sample Output for the boot flash Command on the Router Sample Output for the dir flash Command on the RouterRouter boot flashc2800-adventerprisek9-mz ExamplesRouter# configure terminal Router# show running config interface gigabitethernet2/0Router# service-module gigabitethernet2/0 session Switch dir flashSwitch# ctrl+shift+6 Switch# show ip interface briefSwitch# show power inline Sample Output for Pressing Ctrl+Shift+6 Followed byDhcp Feature Default SettingSTP Prerequisites Clustering Concepts section on Return Sample Output for Assigning the IP Address and Subnet Mask Sample Output for Entering an Interface NameCommand or Action Purpose Sample Output for Saving the Configuration to NvramRouter# service-module gigabitethernet1/0 reload Router# service-module gigabitethernet1/0 shutdownRouter# service-module gigabitethernet1/0 reset Cisco IOS Release 12.225SEC Restrictions Default Switch Stack ConfigurationAssigning a Stack Member Number Sample Output for the reload slot Command Sample Output for the switch renumber CommandShow switch Switchconfig# switch 6 renumberSample Output for the show switch Command Setting the Stack Member Priority ValueSample Output for the switch priority Command Verifying Information About the Switch StackSwitchconfig# switch 2 priority Switch show switchSwitch# show platform stack-manager all Show switch stack-ports Switchconfig# show switch neighborsShow version Using the CLI to Manage Switch ClustersRcommand Sample Output for the show cluster members Command Sample Output for the rcommand and show version CommandsChoose View Refresh Choose Cluster Add to Cluster or Cluster member PasswordDetailed Steps from the CLI Creating a Cluster Standby GroupRouting-redundancy Cluster standby-group HSRP-group-nameNo switchport Sample Output for the ping tftpserver Command Sample Output for the copy tftp flash Command Sample Output for the show flash CommandSwitch# show flash Switch# copy tftp flashService-module interface slot/port password-reset Flashinit Recovering from a Corrupted Software Image Using XmodemPassword-reset Service-module interface slot/portFlashinit Control+6Router# copy flash xmodem TroubleshootingSample Output for the copy flash xmodem Command Router# copy tftp xmodem Sample Output for the copy tftp xmodem CommandRouter# service-module gigabitethernet2/0 password-reset Router# service-module gigabitethernet1/0 sessionRecovering from a Lost or Forgotten Password Optional loadhelper filesystem/file-url Enable secret password Boot -x -v deviceimagenameRename Copy flashReload Copy running-configuration startup-configurationOptional set Boot Service-module password-reset commandSet 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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