Symptom

VLAN configuration mode states you can configure VLAN name up to 128 characters without "system vlan long-name" enabled: VL-LB-SNX901(config)# vlan 3060 VL-LB-SNX901(config-vlan)# name ? WORD The ascii name for the VLAN (Max Size 128) => it is indicated there that I can enter a vlan name with 128 character VL-LB-SNX901(config-vlan)# name LONGVLANNAME-TEST-123456789ABCDEFG => command is OK VL-LB-SNX901(config-vlan)# copy run start => commit is OK [########################################] 100% Copy complete. VL-LB-SNX901(config-vlan)# exit => and get the error after this command ERROR: Long VLAN name knob is not enabled, vlan-name >32 char is not allowed.

Conditions

"no system vlan long-name" configured, attempt to configure VLAN with name >32 characters.

Workaround

Configure "system vlan long-name" to allow VLAN names >32 and <128 characters.

Further Problem Description