If you do not want an IS-IS interface to establish dynamic BFD sessions, configure the interface to prevent it.
After the bfd all-interfaces enable command is used for an IS-IS process on a P2P network, all IS-IS interfaces whose neighbor status is Up establish dynamic BFD sessions; all IS-IS interfaces whose neighbor status is Up on a broadcast network establish dynamic sessions between DISs and non-DISs. To prevent an interface from dynamically establishing BFD sessions, perform the following steps.
The system view is displayed.
The interface view is displayed.
The interface is prevented from dynamically establishing BFD sessions.
The configuration is committed.