Symptom
With high route scale running in 8000 router, when "clear route ipv4 unicast" is issued we see the next logs:
E.g. logging from the linecards:
fib_mgr[243]: %ROUTING-FIB-3-ASSERT_CTX_RL : BCDLdispatch [mpls_lsd_v4 pri=3 low_pri_upds #pre >
fib_mgr[243]: %ROUTING-FIB-3-ASSERT_RL : FIB internal inconsistency detected: route new 4180 backup lsd leaf rib f=0x200000 f2= > : fib_mgr : (PID=5778) : -Traceback= 7f16aae67726 55fb9a9ed47b 55fb9a9e6434 55fb9a9efd2c 55fb9a8ac44e 55fb9a8bf3cb 55fb9a8aacd6 55fb9a8a8579 55fb9a8ae489 7f16aacf35a5 7f16aacfd438 55fb9a8a7561
fib_mgr[153]: %ROUTING-FIB-3-ASSERT_CTX_RL : BCDLdispatch [mpls_lsd_v4 pri=3 low_pri_upds #pre >
fib_mgr[153]: %ROUTING-FIB-3-ASSERT_RL : FIB internal inconsistency detected: route new 4180 backup lsd leaf rib f=0x200000 f2= > : fib_mgr : (PID=5792) : -Traceback= 7fd6602f0726 555b97e0947b 555b97e02434 555b97e0bd2c 555b97cc844e 555b97cdb3cb 555b97cc6cd6 555b97cc4579 555b97cca489 7fd66017c5a5 7fd660186438 555b97cc3561
fib_mgr[179]: %ROUTING-FIB-3-ASSERT_CTX_RL : BCDLdispatch [mpls_lsd_v4 pri=3 low_pri_upds #pre >
fib_mgr[179]: %ROUTING-FIB-3-ASSERT_RL : FIB internal inconsistency detected: route new 4180 backup lsd leaf rib f=0x200000 f2= > : fib_mgr : (PID=5780) : -Traceback= 7f5c3e7a1726 564e954af47b 564e954a8434 564e954b1d2c 564e9536e44e 564e953813cb 564e9536ccd6 564e9536a579 564e95370489 7f5c3e62d5a5 7f5c3e637438 564e95369561
Conditions
+ After issuing "clear route ipv4 unicast" in routers with "high scale".
+ High scale in this context --> Routes ~>>800k prefixes.
Workaround
No workaround known so far.
