Cisco 3560G 48TS Software Configuration Guide - Page 120
Catalyst1900 and Catalyst2820 CLI Considerations, Using SNMP to Manage Switch Clusters
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Using SNMP to Manage Switch Clusters Chapter 5 Clustering Switches Catalyst 1900 and Catalyst 2820 CLI Considerations If your switch cluster has Catalyst 1900 and Catalyst 2820 switches running standard edition software, the Telnet session accesses the management console (a menu-driven interface) if the cluster command switch is at privilege level 15. If the cluster command switch is at privilege level 1 to 14, you are prompted for the password to access the menu console. Command-switch privilege levels map to the Catalyst 1900 and Catalyst 2820 cluster member switches running standard and Enterprise Edition Software as follows: • If the command-switch privilege level is 1 to 14, the cluster member switch is accessed at privilege level 1. • If the command-switch privilege level is 15, the cluster member switch is accessed at privilege level 15. Note The Catalyst 1900 and Catalyst 2820 CLI is available only on switches running Enterprise Edition Software. For more information about the Catalyst 1900 and Catalyst 2820 switches, refer to the installation and configuration guides for those switches. Using SNMP to Manage Switch Clusters When you first power on the switch, SNMP is enabled if you enter the IP information by using the setup program and accept its proposed configuration. If you did not use the setup program to enter the IP information and SNMP was not enabled, you can enable it as described in the "Configuring SNMP" section on page 26-6. On Catalyst 1900 and Catalyst 2820 switches, SNMP is enabled by default. When you create a cluster, the cluster command switch manages the exchange of messages between cluster member switches and an SNMP application. The cluster software on the cluster command switch appends the cluster member switch number (@esN, where N is the switch number) to the first configured read-write and read-only community strings on the cluster command switch and propagates them to the cluster member switch. The cluster command switch uses this community string to control the forwarding of gets, sets, and get-next messages between the SNMP management station and the cluster member switches. Note When a cluster standby group is configured, the cluster command switch can change without your knowledge. Use the first read-write and read-only community strings to communicate with the cluster command switch if there is a cluster standby group configured for the cluster. If the cluster member switch does not have an IP address, the cluster command switch redirects traps from the cluster member switch to the management station, as shown in Figure 5-13. If a cluster member switch has its own IP address and community strings, the cluster member switch can send traps directly to the management station, without going through the cluster command switch. If a cluster member switch has its own IP address and community strings, they can be used in addition to the access provided by the cluster command switch. For more information about SNMP and community strings, see Chapter 26, "Configuring SNMP." 5-22 Catalyst 3560 Switch Software Configuration Guide 78-16156-01
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