Problemas al crear VLAN (L2) en Cisco

Algunos problemas y soluciones al crear VLAN en Cisco

SWITCH75

Cisco IOS (tm) C3500XL Software (C3500XL-C3H2S-M)
Version 12.0(5)WC9, RELEASE SOFTWARE (fc1)

PROBLEMA

SCASWT75#config t

SCASWT75(config)#vlan

% Invalid input detected at '^' marker.

SOLUCION

SCASWT75#vlan database

SCASWT75(vlan)#vlan 75 name "PC"

VLAN 75 modified:

                      Name: PC

SCASWT75(vlan)#show vlan

               VLAN ISL Id:75

    Name: PC

    Media Type: Ethernet

    VLAN 802.10 Id: 100080

    State: Operational

    MTU: 1500

    Backup CRF Mode: Disabled

SWITCH82

Cisco IOS Software, C2960 Software (C2960-LANBASE-M)

Version 12.2(35)SE5, RELEASE SOFTWARE (fc1)

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PROBLEMA 
SWITCH82#config t

SWITCH82(config)#vlan 82

%VTP VLAN configuration not allowed when device is in CLIENT mode.

¿Qué es VTP?

https://www.cisco.com/c/en/us/support/docs/lan-switching/vtp/10558-21.html

SOLUCION 
SWITCH82(config)#vtp ?

  domain     Set the name of the VTP administrative domain.

  file       Configure IFS filesystem file where VTP configuration is stored.

  interface  Configure interface as the preferred source for the VTP IP updater address.

  mode       Configure VTP device mode

  password   Set the password for the VTP administrative domain

  pruning    Set the adminstrative domain to permit pruning

  version    Set the adminstrative domain to VTP version

SWITCH82(config)#vtp mode transparent

Setting device to VTP TRANSPARENT mode.

SWITCH82(config)#vlan 82
SWITCH82(config-vlan)#name "PC"
SWITCH82(config-vlan)#end
SWITCH82#show vlan 

               VLAN ISL Id:82

    Name: PC

    Media Type: Ethernet

    VLAN 802.10 Id: 100080

    State: Operational

    MTU: 1500

    Backup CRF Mode: Disabled