(Optional) Blocking Synchronization Between LDP and IS-IS on an Interface
Context
The ldp-sync enable command run in an IS-IS process enables synchronization between LDP and IS-IS on all local IS-IS interfaces. On an IS-IS interface transmits importance services, LDP and IS-IS synchronization may affect service transmission. If the link is working properly and an LDP session over the link fails, IS-IS sends link state PDUs (LSPs) to advertise the maximum cost of the link. As a result, IS-IS does not select the route for the link, which affects important service transmission.
To prevent the preceding problem, block LDP and IS-IS synchronization on an IS-IS interface that transmits important services.
Procedure
- Run system-view
The system view is displayed.
- Run interface interface-type interface-number
The IS-IS interface view is displayed.
- (Optional) On an Ethernet interface, run undo portswitch
The interface is switched to Layer 3 mode.
By default, an Ethernet interface works in Layer 2 mode.Only the S5720HI, S5720EI, S6720EI, and S6720S-EI support switching between Layer 2 and Layer 3 modes.
- Run isis ldp-sync block
Synchronization between LDP and IS-IS is blocked on the interface.
By default, synchronization between LDP and IS-IS is not blocked on an interface.
