Symptom

Extra VLAN entry with a 5-digit value can be seen under "show vlan" after the creation of an extended VLAN on a IE3010. Switch#sh vlan | i active 1 default active Fa0/1, Fa0/2, Fa0/3, Fa0/4 100 VLAN0100 active 101 VLAN0101 active 102 VLAN0102 active 103 VLAN0103 active 104 VLAN0104 active 105 VLAN0105 active 106 VLAN0106 active 107 VLAN0107 active 108 VLAN0108 active 109 VLAN0109 active 110 VLAN0110 active 111 VLAN0111 active 112 VLAN0112 active 113 VLAN0113 active 114 VLAN0114 active 115 VLAN0115 active 116 VLAN0116 active 117 VLAN0117 active 118 VLAN0118 active 119 VLAN0119 active 120 VLAN0120 active 121 VLAN0121 active 122 VLAN0122 active 123 VLAN0123 active 124 VLAN0124 active 22345 VLAN2345 active <<<<< 2345 VLAN2345 active Issue is not seen under "show vlan brief".

Conditions

Creation of an extended VLAN. Issue does not always appear immediately after VLAN creation.

Workaround

Deleting vlan.dat and reloading the switch appears to remove the extra VLAN.

Further Problem Description