HP Cisco Catalyst Blade Switch 3020 Cisco Catalyst Blade Switch 3020 for HP So - Page 244
VLAN Configuration Mode Options, VLAN Configuration in config-vlan Mode
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Configuring Normal-Range VLANs Chapter 10 Configuring VLANs are several adjacent switches that all have run out of spanning-tree instances. You can prevent this possibility by setting allowed lists on the trunk ports of switches that have used up their allocation of spanning-tree instances. If the number of VLANs on the switch exceeds the number of supported spanning-tree instances, we recommend that you configure the IEEE 802.1s Multiple STP (MSTP) on your switch to map multiple VLANs to a single spanning-tree instance. For more information about MSTP, see Chapter 14, "Configuring MSTP." VLAN Configuration Mode Options You can configure normal-range VLANs (with VLAN IDs 1 to 1005) by using these two configuration modes: • VLAN Configuration in config-vlan Mode, page 10-6 You access config-vlan mode by entering the vlan vlan-id global configuration command. • VLAN Configuration in VLAN Database Configuration Mode, page 10-6 You access VLAN database configuration mode by entering the vlan database privileged EXEC command. VLAN Configuration in config-vlan Mode To access config-vlan mode, enter the vlan global configuration command with a VLAN ID. Enter a new VLAN ID to create a VLAN, or enter an existing VLAN ID to modify that VLAN. You can use the default VLAN configuration (Table 10-2) or enter multiple commands to configure the VLAN. For more information about commands available in this mode, see the vlan global configuration command description in the Cisco Catalyst Blade Switch 3020 for HP Command Reference for this release. When you have finished the configuration, you must exit config-vlan mode for the configuration to take effect. To display the VLAN configuration, enter the show vlan privileged EXEC command. You must use this config-vlan mode when creating extended-range VLANs (VLAN IDs greater than 1005). See the "Configuring Extended-Range VLANs" section on page 10-11. VLAN Configuration in VLAN Database Configuration Mode To access VLAN database configuration mode, enter the vlan database privileged EXEC command. Then enter the vlan command with a new VLAN ID to create a VLAN, or enter an existing VLAN ID to modify the VLAN. You can use the default VLAN configuration (Table 10-2) or enter multiple commands to configure the VLAN. For more information about keywords available in this mode, see the vlan VLAN database configuration command description in the command reference for this release. When you have finished the configuration, you must enter apply or exit for the configuration to take effect. When you enter the exit command, it applies all commands and updates the VLAN database. VTP messages are sent to other switches in the VTP domain, and the privileged EXEC mode prompt appears. Saving VLAN Configuration The configurations of VLAN IDs 1 to 1005 are always saved in the VLAN database (vlan.dat file). If the VTP mode is transparent, they are also saved in the switch running configuration file. You can enter the copy running-config startup-config privileged EXEC command to save the configuration in the startup configuration file. To display the VLAN configuration, enter the show vlan privileged EXEC command. 10-6 Cisco Catalyst Blade Switch 3020 for HP Software Configuration Guide OL-8915-01