Cisco Systems NME-16ES-1G manual Discovery of Candidates and Members Through Different VLANs

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Cisco EtherSwitch Service Modules Feature Guide

Information About the Cisco EtherSwitch Service Modules

Discovery of Candidates and Members Through Different VLANs

If the cluster command switch is a Cisco EtherSwitch service module, the cluster can have cluster member switches in different VLANs. As cluster member switches, they must be connected through at least one VLAN in common with the cluster command switch. The cluster command switch in Figure 3 has ports assigned to VLANs 9, 16, and 62 and therefore discovers the switches in those VLANs. It does not discover the switch in VLAN 50. It also does not discover the switch in VLAN 16 in the first column because the cluster command switch has no VLAN connectivity to it.

Note For additional considerations about VLANs in switch stacks, see the “Switch Clusters and Switch Stacks” section on page 31.

Figure 3

Discovery Through Different VLANs

Command device

VLAN 62 VLAN trunk 9,16

VLAN 50

VLAN 62

VLAN trunk 9,16

VLAN 16

VLAN trunk 4,16

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Discovery of Candidates and Members Through Different Management VLANs

Cluster command switches can discover and manage cluster member switches in different VLANs and different management VLANs. As cluster member switches, they must be connected through at least one VLAN in common with the cluster command switch. They do not need to be connected to the cluster command switch through their management VLAN. The default management VLAN is VLAN 1.

Note If the switch cluster has a Cisco EtherSwitch service module, Catalyst 3750 switch, or switch stack, that switch or switch stack must be the cluster command switch.

The cluster command switch and standby command switch in Figure 4 have ports assigned to VLANs 9, 16, and 62. The management VLAN on the cluster command switch is VLAN 9. Each cluster command switch discovers the switches in the different management VLANs except these:

•Switches 7 and 10 (switches in management VLAN 4) because they are not connected through a common VLAN (meaning VLANs 62 and 9) with the cluster command switch

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 Accessing the CLI of a Specific Stack Member Clustering ConceptsManagement Connectivity to Specific Stack Members Command Device Characteristics Standby Command Device CharacteristicsCluster Compatibility Candidate and Member Characteristics Automatic Discovery of Candidates and MembersDiscovery of Candidates and Members Through CDP Hops 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 shutdown Router# service-module gigabitethernet1/0 resetRouter# service-module gigabitethernet1/0 reload 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-portsUsing the CLI to Manage Switch Clusters RcommandShow version 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+6Troubleshooting Sample Output for the copy flash xmodem CommandRouter# copy flash xmodem 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 BootSample Output for the set Command ExampleSet 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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