d. CatOS Setting the password for VTP in CatOS is done with the set vtp passwd command: Switch1-Catos# (enable) set vtp passwd MilkBottle Generating the secret associated to the password. VTP domain GAD-Lab modified To encrypt the password SO it cannot be read in the configuration, append the word hidden to the command: Switch1-CatOS# (enable) set vtp passwd MilkBottle hidden Generating the secret associated to the password. The VTP password will not be shown in the configuration. VTP domain GAD- Lab modified To clear the password on a CatOS switch, set the password to the number zero: Switch1-Catos# (enable) set vtp passwd 0 Resetting the password to Default value. VTP domain GAD- Lab modified VTP Pruning VTP pruning must be enabled or disabled throughout the entire VTP domain. Failure to configure VTP pruning properly can result in instability in the network. Configuring VTP By default, all VLANs up to VLAN 1001 are eligible for pruning, except VLAN 1, which can never be pruned. The extended VLANs above VLAN 1001 are not supported by VTP, and as such cannot be pruned. CatOS allows the pruning of VLANs 2-1000. If you enable VTP pruning on a VTP server, VTP pruning will automatically be enabled for the entire domain. VTP pruning is enabled with the vtp pruning command on IOS: 3550-IOS (config)# vtp pruning Pruning switched on Disabling VTP pruning is done by negating the command (no vtp pruning). To show which VLANs are eligible for pruning on a trunk, execute the show interface interface-id switchport command: 3550-IOS# sho int fo/15 switchport Name: Fa0/15 Switchport: Enabled Administrative Mode: trunk Operational Mode: trunk Administrative Trunking Encapsulation: dot1q Operational Trunking Encapsulation: dot1q Negotiation of Trunking: On Access Mode VLAN: 1 (default) Trunking Native Mode VLAN: 1 (default) Administrative Native VLAN tagging: enabled Voice VLAN: none Administrative private-vlan host-association: none Administrative private-vlan mapping: none Administrative private-vlan trunk native VLAN: none Ad