Symptom

isis constantly crash at function isis_area_overload_bit_active function

Conditions

this happens if set overload bit on startup is configured and net address is not configured. Below is an example of what could cause the crash. Their is no isis network address below. router isis set-overload-bit on-startup 360 address-family ipv4 unicast

Workaround

config a valid net address under router isis For example router isis net set-overload-bit on-startup 360 address-family ipv4 unicast

Further Problem Description