Bugzilla – Bug 1744
IPv6 NDisc cache does not report dropped packets
Last modified: 2013-08-06 17:23:51 EDT
Packets dropped by NDisc cache due to internal queue limits are not added to any trace.
This is not a dramatic problem, as the queue limit is much larger for NDisc Cache w.r.t. ARP cache. ARP cache "PendingQueueSize" default is 3 packets for *all* the pending packets, while NDisc queue limit "UnresolvedQueueSize" is 3 packets for each pending request (thus, each destination address).
In order to hit the limit, one should send a batch of 4 or more packets to the same destination. Unlikely happening.
Still, they should be logged.