Symptom
standby RSP and LC see "dropped flood packets"counter increasing when VSM card is in the chassis
RP/0/RSP0/CPU0:ios#show controllers backplane ethernet detail location 0/3/CPU$
Fri Nov 18 06:16:00.177 UTC
Received 15231 broadcast packets, 1867657 multicast packets 780761 dropped
flood packets
RP/0/RSP0/CPU0:ios#
RP/0/RSP0/CPU0:ios#show controllers backplane ethernet detail location 0/3/CPU$
Fri Nov 18 06:16:01.909 UTC
Received 15232 broadcast packets, 1867697 multicast packets 780781 dropped
flood packets
RP/0/RSP0/CPU0:ios#show controllers backplane ethernet detail location 0/3/CPU$
Fri Nov 18 06:16:03.433 UTC
Received 15232 broadcast packets, 1867737 multicast packets 780794 dropped
flood packets
RP/0/RSP0/CPU0:ios#show controllers backplane ethernet detail location 0/3/CPU$
Fri Nov 18 06:16:04.863 UTC
Received 15232 broadcast packets, 1867770 multicast packets 780808 dropped
Conditions
Only when VSM card up in the chassis.
Excessive drops on the channel can result in delayed LC online process or RSP reload.
