The nexthop recursive-lookup restrain disable command disables EVPN global recursion suppression in case of next hop flapping.
The undo nexthop recursive-lookup restrain disable command enables EVPN global recursion suppression in case of next hop flapping.
By default, EVPN global recursion suppression in case of next hop flapping is enabled.
Usage Scenario
If a large number of EVPN routes recurse to the same next hop that flaps frequently, the system will be busy processing changes of these routes, which consumes excessive system resources and leads to high CPU usage. To address this problem, configure EVPN recursion suppression in case of next hop flapping. If you do not care about whether the system is busy processing route selection and advertisement and the possible high CPU usage, run the nexthop recursive-lookup restrain disable command to disable EVPN recursion suppression in case of next hop flapping.
Precautions
The nexthop recursive-lookup restrain disable command can be run in the Global EVPN configuration view and EVPN instance view. Running this command in the Global EVPN configuration view disables the function in all EVPN instances. Running this command in a specified EVPN instance disables the function only in the specified EVPN instance. For an EVPN instance, EVPN recursion suppression in case of next hop flapping can take effect only when this function is enabled in both the Global EVPN configuration view and the EVPN instance view.