To add a VTP client to a VTP domain that already exists, verify that its VTP configuration revision number is lower than the configuration revision number of the other switches in the VTP domain.

• 若要将一个VTP用户模式交换器加入一个已存在的VTP领域内，请先检查它的VTP设定资料的修订号码比该领域内所有交换器的修订号码还来的小。