We're running reboot testing on our system and we are occasionally seeing situations where our system fails to 
initialize and when we look at what's going on, io-pkt-v4-hc is consuming approximately 50% of one CPU and networking 
commands like ifconfig, nicinfo and ping hang (ctrl-C will terminate the commands but it takes 20 to 30 seconds). 
Interestingly, Qnet seems to be OK. I found a forum post where someone had the same problem (see the link below) but 
there weren't any responses. Another data point, if we unplug the network connection and plug it back in, network 
connectivity returns to normal.

Any idea what could be going on? Thanks.

http://community.qnx.com/sf/discussion/do/listPosts/projects.core_os/discussion.newcode.topc15654

Mark