For mid-range and low-end routers of VRP3.4, you can view online L2TP users by running the dis l2tp user command. However, the user names are hidden. Then how to view the user names? See the following example:
<Quidway>dis l2tp user
User Name LocalSID RemoteSID LocalTID
22854 1 1
Total user = 1
Because the user names cannot be displayed, the set l2tp user command cannot be used. We have to adopt a compromising measure to view the online user names by running the dis connetion command in global mode. In this manner, the intranet address of each user can be learned indirectly. When forcing the users offline, you can block a certain domain by running the state domain command in addition to the preceding operation. Thus, users in this domain are blocked for dial-up connection.
The problem may be related to the VRP platform of Huawei.
For this type of problems, you can adopt a compromising way to solve it. It is recommended that the R&D personnel of Huawei solve the problem in the new version.