Symptom
Drop of RIP packets seen on UDP-default
RP/0/RP0/CPU0:NCS#show lpts pifib hardware entry brief location 0/0/CPU0 | in "UDP|RIP|Type"
Type DestIP SrcIP Interface vrf L4 LPort/Type RPort npu Flowtype DestNode PuntPrio Accept Drop Domain OOS
IPV4 any any any 0 17 any 0 0 UDP-default Dlvr RP0 LOW 12814 877 0-default
IPV6 any any any 0 17 any 0 0 UDP-default Dlvr RP0 LOW 0 0 0-default
Prefixes getting timeout and removed
RP/0/RP0/CPU0:NCS#sh rip trace | i 10.56.56.162
Sep 27 15:05:51.522 rip/events 0/RP0/CPU0 t7660 Route 10.56.56.162/32 expired
Sep 27 15:05:51.522 rip/events 0/RP0/CPU0 t7660 Changing metric for route 10.56.56.162/32: active=1, conn=0, metric=1, new-metric=16, apply-holddown=1
Sep 27 15:05:51.522 rip/events 0/RP0/CPU0 t7660 Route 10.56.56.162/32 entered holddown for 180sec
Sep 27 15:05:51.522 rip/events 0/RP0/CPU0 t7660 Scheduling route 10.56.56.162/32 for RIB delete
Sep 27 15:05:51.522 rip/events 0/RP0/CPU0 t7951 Delete all paths for RIP route 10.56.56.162/32 in RIB batch update
Conditions
Using RIP on NCS5500/NCS540 with high number of RIP Neighbours more than 100
Workaround
Increase UDP-default policer rate
