Cisco Systems NME-16ES-1G guide

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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Image 24

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

Contents

Guide Release Modification Contents Network Modules Hardware Installation Guide Hardware Overview Software Features and Benefits Ease-of-Use and Ease-of-Deployment Features Performance Features Management Options Manageability Features Availability Features Vlan Features Security Features QoS and CoS Features Power-over-Ethernet Features Monitoring Features Overview of Switch Stacks Cisco StackWise Concepts Switch Stack Membership Stack Master Election and Re-Election Switch Stack Bridge ID and Router MAC Address Stack Member Numbers Stack Member Priority Values Switch Stack Software Compatibility Recommendations Stack Protocol Version Compatibility Switch 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 Ports Discovery of Newly Installed Switches in Clusters New out-of-box Hsrp and Standby Cluster Command Switches Virtual IP Addresses in Clusters Other Considerations for Cluster Standby Groups Automatic Recovery of Cluster Configuration IP Addresses in Clusters Hostnames in Clusters Passwords in Clusters Switch Clusters and Switch StacksSwitch Stack Switch Cluster Snmp Community Strings in Clusters Switch Stack Switch Cluster Availability of Switch-Specific Features in Switch Clusters TACACS+ and Radius in Clusters Cisco IOS Release 12.225SEC Using Interface Configuration Mode Command or Action Purpose Boot flash image-nameExample Dir flash Enable Show running configurationConfigure terminal Service-module interface slot/port session Show power inline Output of the show service-module status commandShow ip interface brief Control+shift+6 Sample Output for the dir flash Command on the Router Sample Output for the boot flash Command on the RouterRouter boot flashc2800-adventerprisek9-mz Examples Router# show running config interface gigabitethernet2/0 Router# configure terminalRouter# service-module gigabitethernet2/0 session Switch dir flash Switch# show ip interface brief Switch# ctrl+shift+6Switch# show power inline Sample Output for Pressing Ctrl+Shift+6 Followed by Feature Default Setting Dhcp STP Prerequisites Clustering Concepts section on Return Sample Output for Entering an Interface Name Sample Output for Assigning the IP Address and Subnet Mask Sample Output for Saving the Configuration to Nvram Command or Action Purpose Router# 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 Restrictions Assigning a Stack Member Number Sample Output for the switch renumber Command Sample Output for the reload slot CommandShow switch Switchconfig# switch 6 renumber Setting the Stack Member Priority Value Sample Output for the show switch Command Verifying Information About the Switch Stack Sample Output for the switch priority CommandSwitchconfig# switch 2 priority Switch show switch Switch# show platform stack-manager all Switchconfig# show switch neighbors Show switch stack-ports Using the CLI to Manage Switch Clusters RcommandShow version Sample Output for the rcommand and show version Commands Sample Output for the show cluster members Command Choose View Refresh Choose Cluster Add to Cluster or Password Cluster member Creating a Cluster Standby Group Detailed Steps from the CLI Cluster standby-group HSRP-group-name Routing-redundancy No 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 flash Recovering from a Corrupted Software Image Using Xmodem Service-module interface slot/port password-reset Flashinit Service-module interface slot/port Password-resetFlashinit Control+6 Troubleshooting Sample Output for the copy flash xmodem CommandRouter# copy flash xmodem Sample Output for the copy tftp xmodem Command Router# copy tftp xmodem Router# service-module gigabitethernet1/0 session Router# service-module gigabitethernet2/0 password-reset Recovering from a Lost or Forgotten Password Optional loadhelper filesystem/file-url Boot -x -v deviceimagename Enable secret passwordRename Copy flash Copy running-configuration startup-configuration Reload Optional set Service-module password-reset command Boot Sample 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 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