Troubleshooting VTP 

The following are some common things to check when troubleshooting problems with VTP: 

■ Make sure you are trunking between the switches. VTP is sent only over trunk links. 

■ Make sure the domain name matches on both switches. (The name is case sensitive.) 

■ If the switch is not updating its database, make sure it is not in transparent mode. 

■ If using passwords, make sure they all match. To remove a password, use no vtp password. 

■ If VLANs are missing, check the Revision number for a possible database overwrite. Also check the number of VLANs in the domain. 

There might be too many VLANs for VTP to update properly.